Set of rules SP-17.13330.2011

"SNiP II-26-76. ROOF"

Updated edition of SNiP II-26-76

With changes:

Introduction

The set of rules contains requirements that meet the goals of Part 6 of Article 3 of Federal Law of December 30, 2009 N 384-FZ “Technical Regulations on the Safety of Buildings and Structures”.

The work was carried out by OJSC "TsNIIPromzdaniy": prof., doctor of technical sciences. Sciences V.V. Granev, prof., cand. tech. Sciences S.M. Glikin, Ph.D. Sciences A.M. Voronin, A.V. Peshkova, N.N. Shcherbak.

1 area of ​​use

This set of rules applies to the design of roofs made of bitumen, bitumen-polymer, elastomeric and thermoplastic rolled materials, mastics with reinforcing gaskets, chrysotile cement, cement fiber and bitumen corrugated sheets, cement-sand, ceramic, polymer cement and bitumen tiles, flat, chrysotile cement, composite , cement-fiber and slate tiles, galvanized steel sheets, copper, zinc-titanium, aluminum, corrugated metal sheets, metal tiles, as well as reinforced concrete tray panels used in buildings for various purposes and in all climatic zones Russian Federation.

The possibility of using other similar materials must be confirmed in accordance with the procedure established by law Russian Federation in the field of technical regulation.

These rules and regulations apply to the reconstruction and major repairs of the roof (roof) with a roof made of the above materials.

2 Normative references

3 Terms and definitions

4 General provisions

4.1 These standards must be observed when designing roofs of buildings and structures for various purposes in order to meet the requirements of the Federal Law of December 30, 2009 N 384-FZ "Technical Regulations on the Safety of Buildings and Structures", Federal Law of July 22, 2008 N 123- Federal Law "Technical Regulations on Fire Safety Requirements" and Federal Law of November 23, 2009 N 261-FZ "On Energy Saving and on Increasing Energy Efficiency and on Amendments to Certain Legislative Acts of the Russian Federation".

When designing roofs, in addition to these standards, the requirements of the current standards for the design of buildings and structures, safety precautions and labor protection rules must be met.

4.2 Materials used for roofs and foundations under the roof must meet the requirements of current documents in the field of standardization.

4.3 Preferred roof slopes depending on the materials used are given in Table 1; in valleys, the roof slope is taken depending on the distance between the funnels, but not less than 0.5%.

Table 1

4.5 The height of the ventilated channels and the dimensions of the inlet and outlet ventilation openings of the channel depend on the slope, roof area and humidity of the inner layers of the roof (Table 2).

table 2

4.6 In roofs made of metal sheets (except aluminum) laid on a continuous flooring, a volumetric space should be provided between the sheets and the flooring diffusion membrane(ODM) for condensate removal.

4.8 The height of the roof railings is provided in accordance with the requirements of GOST 25772, SP 54.13330, SP 56.13330 and SNiP 31-06. When designing roofs, it is also necessary to provide for other special safety elements, which include hooks for hanging ladders, elements for fastening safety ropes, steps, footboards, stationary ladders and walkways, evacuation platforms, etc., as well as elements for lightning protection of buildings.

4.10 When designing roofs in use, the coating must be checked by calculating the effect of additional loads from equipment, vehicles, people, etc. in accordance with SP 20.13330.

4.11 In roofs with a load-bearing metal profiled decking and a heat-insulating layer made of materials of flammability groups G2 - G4, provision should be made for filling the voids of the corrugations of the decking to a length of 250 mm with materials of the flammability group NG at the junction of the decking with the walls, expansion joints, the walls of the lanterns, as well as on each side of the ridge and valley of the roof. If two or more layers of insulation with different flammability ratings are used to insulate the roof, the need to fill the corrugations of the decking is determined by the flammability group of the lower layer of the insulating material.

Filling corrugated voids with bulk insulation is not allowed.

4.12 Transfer dynamic loads on the roof from devices and equipment installed on the covering (roof) is not allowed.

4.13 When reconstructing a combined covering (roof), if it is impossible to maintain the existing thermal insulation in terms of strength and humidity, it must be replaced; If the permissible humidity of the thermal insulation is exceeded, but the strength is satisfactory, measures are taken to ensure its natural drying during the operation of the roof. To do this, in the thickness of the insulation and/or screed or in additional thermal insulation (determined according to SP 50.13330) in two mutually perpendicular directions, channels should be provided that communicate with the outside air through ventilation holes in the eaves, vents at parapets, end walls, rising above the roof of parts of buildings, as well as through aeration pipes installed above the intersection of the channels. The number of pipes and drying time should be determined by calculation (Appendix B).

4.15 In working drawings of the covering (roof) of buildings it is necessary to indicate:

roof design, name and brand of materials and products with links to documents in the field of standardization;

the magnitude of the slopes, installation locations drainage funnels and location of expansion joints;

roofing parts in places of installation of drainage funnels, drainage gutters and junctions with walls, parapets, ventilation and elevator shafts, cornices, pipes, skylights and other structural elements.

The working drawings of the construction part of the project must indicate the need to develop measures for fire protection, monitoring compliance with fire safety rules and safety regulations during construction and installation work.

5 Roll and mastic roofs

5.1 Roll roofs are made of bitumen and bitumen-polymer materials with cardboard, fiberglass and combined bases and bases made of polymer fibers, elastomeric materials, TPO membranes, PVC membranes and similar rolled roofing materials that meet the requirements of GOST 30547, and mastic roofs - from bitumen, bitumen-polymer, bitumen-rubber , bitumen-emulsion or polymer mastics that meet the requirements of GOST 30693, with reinforcing glass fiber materials or gaskets made of polymer fibers.

5.2 Roofs made of roll and mastic materials can be made in traditional (when the waterproofing carpet is located above the thermal insulation) and inverse (when the waterproofing carpet is located under the thermal insulation) options (Appendix D).

5.3 The constructive solution for a roof covering in an inversion version includes: reinforced concrete prefabricated or monolithic slabs, a screed made of cement-sand mortar or a slope-forming layer, for example, lightweight concrete, a primer, a waterproofing carpet, single-layer thermal insulation, a safety (filter) layer, a weight of gravel or concrete slabs OK.

In inversion roofing, only slabs with low water absorption (no more than 0.7% by volume in 28 days), for example, extruded polystyrene foam, should be used as thermal insulation.

5.4 In exploited and inverted roofs with a soil layer and a landscaping system, the waterproofing carpet must be made of materials that are resistant to rotting and damage by plant roots. In roofing materials that are not resistant to germination by plant roots, an anti-root layer is provided.

5.5 The number of layers of waterproofing carpet depends on the slope of the roof, the flexibility and heat resistance of the material used and should be taken taking into account the recommendations set out in tables E.1 - E.3 of Appendix E.

5.6 The following can serve as a base for a waterproofing carpet:

reinforced concrete load-bearing slabs, the seams between which are sealed with cement-sand mortar of grade no lower than 100 or concrete of class no lower than B 7.5;

thermal insulation boards, which must be resistant to organic solvents (gasoline, ethyl acetone, nefras, etc.) of cold mastics and resistant to the effects of temperatures of hot mastics; thermal insulation boards made of polystyrene foam and other combustible insulation materials can be used subject to the conditions of 5.11. Thermal insulation boards made of foam glass, expanded polystyrene and mineral wool slabs may have a factory-made inclined surface that provides a slope to the waterproofing carpet;

monolithic thermal insulation from lightweight concrete, as well as materials based on cement or bitumen binders with effective fillers - perlite, vermiculite, foam granules, etc.;

leveling monolithic screeds from cement-sand mortar and asphalt concrete, as well as prefabricated (dry) screeds from two chrysotile cement flat pressed sheets 10 mm thick according to GOST 18124 or from two cement particle boards 12 mm thick according to GOST 26816, fastened with screws in such a way that the joints of the plates in different layers do not coincide.

5.7 The possibility of using insulation as a base for a waterproofing carpet (without installing a leveling screed on it) should be established based on the loads acting on the roof, taking into account the elastic characteristics of thermal insulation (tensile strength, relative elongation, elastic modulus).

The thickness and reinforcement of the cement-sand screed used as a platform for equipment, parking for cars, etc. and laid on lightweight heat-insulating boards (mineral wool, polystyrene foam, fiberglass) are also installed by calculation taking into account the elastic characteristics of the heat-insulating boards.

5.8 Between cement-sand screed and porous (fibrous) thermal insulation must be provided with a separating layer of rolled material, which prevents the insulation from getting wet during screeding or damaging the surface of the fragile insulation (for example, foam glass).

5.9 Leveling screeds must be provided with temperature-shrinkable joints up to 10 mm wide, dividing the screed made from cement-sand mortar into sections no larger than 6x6 m, and those made from sand asphalt concrete into sections no larger than 4x4 m. In cold pavements with load-bearing slabs in length 6 m these areas should be 3x3 m.

5.10 Along the temperature-shrinkage seams, provision should be made for laying expansion joint strips 150-200 mm wide from rolled materials with gluing along both edges to a width of about 50 mm.

5.11 Thermal insulation boards made of polystyrene foam and other combustible insulation materials can be used as a base for a waterproofing carpet made of rolled materials without a leveling screed device only when the rolled material is laid freely or when using self-adhesive materials, or with mechanical fastening it, since the fire method of sticking with combustible insulation is unacceptable.

If thermal insulation boards and the roofing material laid on the thermal insulation are incompatible, a separating layer of fiberglass or geotextile with a density of at least 100 g/m2 must be provided between them.

5.12 Vapor barrier to protect the thermal insulation layer and the base under the roof from humidification of vaporous moisture in the premises should be provided in accordance with the requirements of SP 50.13330. The vapor barrier layer must be continuous and waterproof.

In places where the heat-insulating layer adjoins walls, lantern walls, shafts and equipment passing through the coating or attic floor, the vapor barrier must be raised to a height equal to the thickness of the heat-insulating layer, and in places of expansion joints it must be placed on the edges of the metal expansion joint and hermetically glued or welded.

5.13 When fastening the roofing carpet with fasteners, their pitch is determined by calculating the wind load (Appendix E).

5.14 In places where there is a difference in heights, where the roof meets the parapets, the walls of the sides of the lanterns, in places where pipes pass, at drainage funnels, ventilation shafts, etc. provide an additional waterproofing carpet, the number of layers of which is recommended to be taken according to Appendix D.

5.15 Additional layers of waterproofing carpet made from rolled materials and mastics must be extended onto vertical surfaces by at least 250 mm.

In accordance with GOST 30693, the adhesion strength of the bottom layer of the roofing carpet to the screed and between layers must be at least 1 kgf/cm 2.

5.16. Hot and cold bitumen, bitumen-rubber, bitumen-polymer and bitumen-emulsion mastics, as well as built-up roll materials, depending on the roof slope, must have a heat resistance not lower than that indicated in Table 3.

Table 3

5.17 On roofs (types K-1 and K-2, Appendix D) with a slope of up to 10% (up to 6°) made of mastic or bitumen and bitumen-polymer roll materials with fine-grained topping, a protective layer should be provided from gravel of fraction 5- 10 mm or from coarse-grained topping (stone chips) with a frost resistance grade of at least 100, embedded in mastic. The thickness of the protective layer of gravel should be 10-15 mm, and that of sprinkles - 3-5 mm. In roofs made of mastic materials, the protective paint layer must be resistant to solar radiation. In the valley of such a roof, a protective layer of gravel or coarse-grained topping should be provided for a width of 1.5 m.

5.18 The protective layer of roofs in use (type K-3, Appendix D) must be slab or monolithic non-combustible materials NG with a frost resistance grade of at least 100, a thickness of at least 30 mm and strength determined by calculation of loads in accordance with SP 20.13330, and in the case of grass cover - soil. In the monolithic protective layer of roofs in use, temperature-shrinkable joints up to 10 mm wide, filled with sealing mastics, should be provided no more than 1.5 m apart in mutually perpendicular directions.

5.20 In operating inversion roofs (type K-4, Appendix D), intended for housing cafes, sports grounds, solariums, parking lots, etc. the protective layer should be made of cement-sand mortar or monolithic reinforced concrete, or from concrete slabs over a layer of cement-sand mortar or on special supports or laid on geotextiles.

5.21 Protective layer of roofs in areas for cleaning industrial dust, snow, storing materials, etc. are provided from cement-sand mortar or slab materials laid on cement-sand mortar in compliance with the requirements of 5.18.

5.22 On unused roofs made of elastomeric and thermoplastic rolled materials made by the free-laying method, a slab or gravel loading layer should be provided, the weight of which is determined by calculation for wind load (Appendix E).

5.23 The maximum permissible area of ​​the roof made of rolled and mastic materials of flammability groups G-2, G-3 and G-4 with a total thickness of the waterproofing carpet up to 8 mm, without protection from a layer of gravel or coarse-grained topping, as well as the area of ​​areas separated by fire belts (walls), should not exceed the values ​​​​given in Table 4.

5.24 Fire belts must be made as protective layers of roofs in use (5.18) with a width of at least 6 m. Fire belts must cross the base under the roof (including thermal insulation), made of materials of flammability groups G-3 and G-4, to the full thickness these materials.

Table 4

5.25 In places where funnels pass through the roof internal drain provide for a decrease of 15-20 mm within a radius of 0.5-1.0 m from the level of the waterproofing carpet and the water receiving bowl.

The axis of the funnel must be at a distance of at least 600 mm from the parapet and other parts of buildings protruding above the roof.

5.26 In an expansion joint with metal expansion joints, the vapor barrier must cover the lower expansion joint, and a compressible insulation is provided in the joint, for example, from glass staple fiber according to GOST 31309 or from mineral wool according to GOST 21880.

5.27 In roofs made of bitumen and bitumen-polymer roll and mastic materials, inclined wedge-shaped sides with sides of about 100 mm can be provided at the junctions with vertical surfaces.

5.28 In places where the roof abuts parapets up to 450 mm high, layers of additional waterproofing carpet can be placed on the upper edge of the parapet, lining the abutments with galvanized roofing steel and securing it with crutches.

In roofs made of TPO membranes or PVC membranes, an additional waterproofing carpet made of these materials can be welded to a drip line made of TPO metal or PVC metal.

5.29 In roofs with a high (more than 450 mm) parapet top part The protective apron can be secured with a metal clamping strip on self-tapping screws and protected with sealant, and the upper part of the parapet is protected with roofing steel, secured with crutches or covered with parapet slabs with sealing of the seams between them.

5.31 In the eaves area with external drainage, it is recommended to reinforce the roof with one layer of additional waterproofing carpet made of rolled material with a width of at least 250 mm, glued to the base under the roof (in roll roofing from bitumen and bitumen-polymer materials), or one layer of mastic with a reinforcing gasket (in mastic roofs). In roofs made of elastomeric materials (for example, EPDM), the waterproofing carpet is glued to the drip edge, and from TPO membranes or PVC membranes, the carpet is welded to the drip edge made of TPO metal or PVC metal.

5.32 On a ridge, a roof with a slope of 3.0% or more is recommended to be reinforced by a width of 150-250 mm on each side, and the valley by a width of 500-750 mm (from the inflection line) with one layer of additional waterproofing carpet made of bitumen or bitumen-polymer roll material (in roll roofing made of bitumen and bitumen-polymer materials) or one reinforced mastic layer (in mastic roofing) according to Appendix D.

5.33 On roofs with grass and inversion roofs, funnels with a drainage ring to drain water and additional elements made of rot-resistant material, for example plastic, should be used.

5.34 Examples of solutions for the details of roll and mastic roofing are given in Appendix G.

6 Roofs made of piece materials and corrugated sheets

In roofings made of piece materials and corrugated sheets, the following are used: tiles, roofing tiles, corrugated, chrysotile-cement, cement-fiber, steel, copper and aluminum sheets and metal tiles. Constructive decisions such roofs are given in Appendix 3.

6.1 Roofs made of cement-sand and ceramic tiles

6.1.1 The slope of a tiled roof depends on the shape of the tiles and the type of installation (Table 5).

Table 5

6.1.2 Additional requirements for roofing made of cement-sand tiles depending on the slope are given in Table 6.

Table 6

Roofs made of cement-sand tiles can have the following design solutions:

the thickness of the thermal insulation is less than the height of the rafters: the diffusion (waterproofing) film is positioned to form two ventilation channels (Table H.1, Appendix H);

the thickness of the thermal insulation is equal to the height of the rafters: the diffusion (wind-hydroprotective) film is located on the surface of the thermal insulation with the formation of one ventilation channel above it (Table H.1, Appendix H);

the thickness of the thermal insulation is greater than the height of the rafters: in this case, an additional layer of thermal insulation can be located below between the transverse frame bars or on top of the rafters between additional bars, the height of which is equal to the thickness of the additional thermal insulation.

6.1.3 The cross-section and pitch of the rafters are established based on the load action according to SP 20.13330. The countergrid should be made of bars with a minimum cross-section of 30x50 mm.

6.1.4 Design solution eaves overhang must ensure unhindered air flow into the roof ventilation ducts.

6.1.5 In gutters, under-roof waterproofing is provided from a waterproof membrane.

6.1.6 Examples of solutions for roofing details are given in Appendix I.

6.1.7 When designing a tiled roof, determine the sheathing pitch (length of the slope) and the length of the roof (Appendix K).

6.2 Roofs made of bituminous tiles

6.2.1 The base for a roof made of bitumen shingles is a continuous deck, which can be made of:

tongue and groove or edged boards coniferous species not lower than 2nd grade (GOST 8486) with a moisture content of no more than 20%;

moisture-resistant plywood grade FK (GOST 3916.2) with a moisture content of no more than 12%;

oriented strand boards (OSB) with a moisture content of no more than 12%.

6.2.2 The pitch and cross-section of the rafters are determined by calculation depending on the existing loads. The thickness of the solid flooring, depending on the pitch of the rafters, is taken according to Table 7.

Table 7

6.2.3 Under the roofing carpet made of bituminous shingles, there must be backing layer made of rolled material, laid under the tiles over the entire roof surface and serving as additional waterproofing on slopes from 20% (12°) to 33% (18°). On large slopes, the lining layer is provided only on eaves and gable overhangs, in places where pipes and shafts pass through the roof, in gutters and at junctions with walls.

6.2.4 Examples of solutions for roofing details are given in Appendix L.

6.3 Tile roofs

6.3.1 Roofing tiles (natural slate, cement-fiber, chrysotile cement, composite) includes a continuous flooring of boards along the rafters, a waterproofing layer of rolled materials on which the tiles are laid.

6.3.2 For fastening roofing tiles, use corrosion-resistant nails (copper or galvanized drawn) or slate pins and screws with a head diameter of at least 9 mm, as well as anti-wind clamps.

6.3.3 Ventilation of tile roofs is provided through ventilated ridges, dormer windows and piece aerators.

6.3.4 It is allowed to use large-format tiles on the sheathing (Appendix M). Details of the junction of the tile roof with walls, parapets and other vertical structures should include metal aprons (for example, made of galvanized roofing steel, copper, lead, aluminum); in these places it is also recommended to provide a lower waterproofing layer.

6.4 Roofs made of corrugated, including profiled, sheets

Structural solutions for roofs made of corrugated sheets, including profiled sheets, are given in Appendix 3, examples of solutions for the details of such roofs are given in Appendices N and P.

Bitumen sheets

6.4.1 Roofs made of corrugated bitumen sheets should be installed on slopes of 20% (12°) or more. For roof slopes of 10 to 20% (6 to 12°), a waterproofing film must be provided under the corrugated sheets.

6.4.2 The base for the roof made of corrugated bitumen sheets should be assigned depending on the slope of the roof.

For a slope of 10 to 20% (6 to 12°), a continuous deck of boards or plywood is required (6.2.1); in this case, the length of the longitudinal overlap should be about 300 mm, and the lateral overlap should be equal to two waves. Transverse joints between corrugated sheets should be sealed with a filler gasket supplied with the sheets.

With a slope of 20 to 25% (from 12 to 15°), the sheathing pitch should be taken equal to about 450 mm, the longitudinal overlap should be about 200 mm, and the lateral overlap should be equal to one wave.

With a slope of more than 25% (more than 15°), the sheathing pitch should be about 600 mm, the longitudinal overlap should be about 170 mm, and the lateral overlap should be equal to one wave.

6.4.3 In the gutter and on the eaves area, it is recommended to provide the lathing for the wall tray in the form of a continuous plank flooring 700 mm wide.

The roof gutter can be provided from galvanized roofing steel or aluminum; corrugated sheets must overlap it by a width of at least 150 mm.

6.4.4 For junctions of a roof made of corrugated sheets to a wall, parapet and chimney corner parts should be used, which are secured with screws passed through the crests of the waves of ordinary sheets; at the same time, they are installed along the slope with an overlap of at least 150 mm, and across the slope by at least one wave.

6.4.5 Fastening of sheets to steel and reinforced concrete purlins should be carried out using galvanized steel hooks or staples, and to wooden bars with galvanized screws in accordance with GOST 1144, GOST 1145 and GOST 1146.

6.4.6 Steel elements for attaching corrugated sheets to the sheathing and purlins must be anti-corrosion protected.

The number of fastenings of sheets to the sheathing with nails or screws, the pitch of the sheathing bars or purlins are determined by calculation for the effective loads in accordance with Chapter SP 20.13330; in this case, the number of fasteners must be at least 4 per sheet, and the number of anti-wind brackets in the cornice row must be at least 2 per sheet.

Chrysotile cement sheets

6.4.7 Chrysotile cement corrugated sheets and products without surface finishing or painted are used for roofing.

6.4.8 Roofs made of corrugated chrysotile cement sheets should be installed on slopes of 20% (12°) or more. For roof slopes of 10 to 20% (6 to 12°), a waterproofing film must be provided under the corrugated sheets.

6.4.9 For roofs of residential buildings, profile sheets SV 40/150 are provided (medium wave, wave height - 40 mm, wave pitch - 150 mm), and for industrial buildings- sheets of profile CE 51/177 (Central European, wave height - 51 mm, wave pitch - 177 mm).

6.4.10 Across the slope, the wave of the covering edge of the corrugated sheet of profile SV 40/150 should overlap the wave of the covered edge of the adjacent sheet, and of the sheet of profile CE 51/177 - half the wave of the adjacent sheet. Along the roof slope, the overlap of chrysotile cement corrugated sheets should be at least 150 mm.

6.4.11 The base for a roof made of chrysotile cement corrugated sheets of civil buildings with an attic can be a lathing made of ordinary bars with a section of 60x60 mm. To ensure a tight longitudinal overlap, all odd-numbered sheathing bars must have a height of 60 mm, and even ones - 63 mm. The pitch of the sheathing bars should be no more than 800 mm. For sheathing bars, coniferous wood is used in accordance with the requirements of SP 64.13330.

6.4.13 In industrial buildings, the base for a roof made of chrysotile cement corrugated sheets is made of steel or wooden purlins.

6.4.14 To interface roofing elements made of chrysotile cement corrugated sheets, chrysotile cement shaped (additional) parts are provided in accordance with GOST 30340. In the absence of chrysotile cement shaped parts, it is allowed to use ridge, corner and tray parts made of thin sheet galvanized steel (including with a polymer coating ) or aluminum alloy.

6.4.15 When the length of a building is more than 25 m, to compensate for deformations in the roof, expansion joints must be provided, located in increments of 12 m for chrysotile cement sheets not protected by a waterproof coating, and 24 m for hydrophobized and painted sheets.

6.4.16. The requirements for roofing parts made of chrysotile cement sheets are similar to the requirements set out in 6.4.3 - 6.4.6.

Cement fiber sheets

6.4.17 Roofs made of corrugated cement-fiber sheets should be provided on slopes of at least 20° (36%), and on slopes of 7-20° (12-36%) an additional waterproofing layer should be provided under the corrugated sheets.

Corrugated cement-fiber sheets are produced in sizes 920x585 mm, 920x875 mm and 1130x1750 mm with a wave pitch of 177 mm and an overlap along the length of 125 mm (the first two); with wave pitch and length overlap - 150 mm (third).

6.4.18 The requirements for the foundation for a roof made of cement fiber sheets are similar to the requirements set out in 6.4.11.

6.4.19 The requirements for roofing parts made of cement fiber sheets are similar to the requirements set out in 6.4.3-6.4.6, 4.6.12-4.6.15.

Metal profiled sheets, including metal tiles

6.4.20 As roofing sheets provide steel profiles with zinc, aluminum-zinc or aluminum coating of the workpiece, protective and decorative paint coating according to GOST 24045, as well as aluminum profiled sheets, metal tiles and composite metal tiles.

6.4.21 Roofs made of profiled sheets are provided on slopes of more than 20% (12°); on slopes from 10 to 20% (6°-12°), it is necessary to provide for sealing of longitudinal and transverse joints between sheets or - a waterproofing layer under the sheets.

The amount of overlap of the corrugated sheet along the slope should be at least 250 mm, and across the slope - by one corrugation.

6.4.22 The base for a roof made of corrugated sheets is wooden bars or metal purlins.

The bearing capacity of the base under the roof is determined by calculation of loads in accordance with SP 20.13330.

6.4.23 Corrugated sheets are attached to purlins self-tapping screws with EPDM sealing washer.

6.4.24 At the junction of the roof made of corrugated metal sheets with the walls, aprons made of steel sheets with zinc or polymer coating are provided. They are fastened with rivets and with a single folded seam between them. Ridge and cornice shaped elements, as well as aprons for finishing roof penetrations, can have a “comb” in the shape of the cross-section of a metal profiled sheet.

6.4.25 Roofs made of metal tiles and composite metal tiles should be used on slopes of more than 20% (12°). On slopes from 10 to 20% (from 6° to 12°) a waterproofing layer must be provided under the metal tiles.

6.4.26 The base for roofing made of metal tiles and composite metal tiles is a decking made of edged boards.

The distance between the sheathing boards depends on the pitch of the tile wave.

6.4.27 In addition to the main parts of the cornice, ridge, drainage tray (gutter), the roof is also equipped with a set of roofing accessories (ridge seal, cap, snow barrier, etc.).

6.4.28 For ventilation of the insulated roof, one or two ventilation ducts must be provided, depending on the design solution (Appendix 3). The exhaust is carried out through a ridge or exhaust pipe, located on the slope. Structural solutions for roofing made from profiled sheets are given in Appendix 3.

6.4.29 On gable overhang roofs should be provided with an end wooden board, which should be higher than the sheathing to the height of the metal tile. The top of the assembly is covered with a metal wind strip.

6.4.30 At the installation site of the gutter, a solid base is provided, the thickness of which is equal to the thickness of the sheathing. The gutter is laid with an overlap of at least 150 mm, and the joint is sealed.

7 Metal sheet roofs

7.1 For roofs made of sheet materials, the following is used: steel (GOST 14918) with a thickness of up to 0.6 mm; copper grade M1 (GOST 859) thickness 0.6 or 0.7 mm, roll width 600 and 670 mm, sheets - 1000 mm; zinc grade Ts-2 (GOST 3640) up to 0.6 mm thick; zinc-titanium 0.7 mm thick, roll width 500, 600 and 670 mm, sheets - 1000 mm; aluminum (GOST 21631) 0.7 mm thick, roll width 500 or 650 mm, sheets - 1000 mm.

7.2 Clamps, fasteners, gutters and pipes, as well as components for lining roof junctions with structures protruding above it must be made of materials in accordance with their compatibility (Table P.2, Appendix P). The height of the roof at the junctions must be taken to be at least 250 mm.

7.3 The base for the roof made of sheet steel and aluminum is wooden sheathing from bars or boards of coniferous species (GOST 24454).

The roof overhang made of sheet steel and aluminum should be provided in the form of a continuous boardwalk with a width of at least 700 mm, and then with a step of no more than 200 mm parallel to the overhang - sheathing bars. In this case, the lathing should alternate with the board on which the lying folds of the joined paintings are located. In gutters, the lathing should be provided in the form of a continuous plank flooring up to 700 mm wide.

7.4 The base for the roof made of zinc-titanium and copper is a solid wooden flooring made of boards with a thickness of at least 24 mm, from moisture-resistant plywood of the FK brand (GOST 3616.2) with a thickness of 22-24 mm or OSB (oriented strand board).

The bearing capacity of the foundation under the roof should be established based on the current loads in accordance with SP 20.13330.

7.5 When choosing materials for the roof, it is necessary to take into account their physical and mechanical properties (Table P.3, Appendix P). Metals such as copper, aluminum, zinc-titanium have high linear expansion rates, so compensation for roof expansion must be provided both along and across the slopes.

The optimal length of a roof slope made of these metals when secured with a sliding clamp should not exceed 10 m. For a longer slope, expansion joints, expansion joints and long sliding clamps should be provided, which are placed along the slope in standing seams.

7.6 The design of transverse connections of sheets (expansion joints) and drainage gutters depends on the angle of inclination of the roof (Appendix C).

The location area of ​​fixed (rigid) clamps on the main plane of the roof (3 m wide) depends on its slope (Appendix C).

7.7 Fixed (rigid) clamps should be provided to secure the roof around structures protruding above it.

When the length of the drainage gutter is over 8 m, the joints of the sheets should be provided in the form of a double lying seam with sealing gaskets.

7.8 It is allowed to provide expansion joints made of elements with elastic strips made of synthetic rubber.

7.9 Fastening of sheet materials should be provided with clamps, which are secured to the base with corrosion-resistant nails or self-tapping screws.

The connection of roofing panels along the slope should be done with double standing seams, and across the slope - with recumbent ones. When the roof slope is more than 35°, a connection along the slope with corner standing seams is allowed.

On the main planes of the roofs, the number of clamps is determined by the calculation of the wind load; the calculated force for pulling out the clamp is about 500 N. At the ridge of the roof and on the overhangs along the perimeter of the building, the number of clamps is doubled.

7.10 When the roof slope is from 3 to 7° (from 5 to 12%), seal the seams with pre-compressed sealing tape (PSUL) to the length of the seam along the slope of at least 3 m from the wall under the eaves.

7.11 Structural solutions for roofs are given in Appendix P (Table P.1), and examples of solutions for roofing details are given in Appendix C.

8 Roofs made of reinforced concrete tray panels

8.1 Roll-free roofs made of reinforced concrete tray panels are provided in buildings with a ventilated attic. Such roofs include reinforced concrete roofing panels, reinforced concrete drainage trays (for internal drainage) protected by a waterproofing layer of mastic paint compositions (from cold bitumen-polymer or polymer mastic according to GOST 30693) and additional elements (frieze panels, support posts, beams, etc.). P.).

8.2 In places where ventilation units, pipes and other passages pass engineering equipment Reinforced concrete panels must have openings with a frame protruding to a height of at least 100 mm.

8.3 Carrying out the eaves of roofing panels during external drainage beyond the edge outer wall must be at least 600 mm, and with internal drainage, at least 100 mm.

8.4 Ventilation openings must be provided in the supporting fascia panels of the walls, the total area of ​​which in each of the longitudinal walls is taken by analogy with requirement 4.4.

8.5 Joints between roofing panels, drainage trays, as well as joints of these elements with ventilation shafts, end fascia panels, risers exhaust ventilation etc. should be located above the main drainage surface of roof panels and drainage trays.

8.6 Drainage trays must be single-span. It is not allowed to pass exhaust ventilation risers, radio and television antenna stands, etc. through the bottom of the drainage trays.

8.7 In roofs with external unorganized drainage, U-shaped reinforced concrete flashings are provided for the ridge joint between the roofing panels (Appendix T), for the junction of roofing panels and drainage trays with end frieze panels - galvanized steel aprons with dowels adjusted to the frieze panel and subsequent installation parapet tiles, and in places where roofing panels meet ventilation shafts - aprons made of galvanized roofing steel with dowels aligned to the vertical plane of the ventilation shafts and a sealing tape laid between the shaft wall and the apron.

8.8 To connect roofing panels with exhaust ventilation risers, metal umbrellas made of galvanized roofing steel with crimp rings can be provided.

9 Roof drainage and snow retention

9.3 In case of unorganized drainage, the projection of the cornice from the plane of the wall must be at least 600 mm.

9.5 On roofs with an attic and in roofs with ventilated air ducts, the inlet pipes of the drain funnels and the cooled sections of the drains must be thermally insulated and heated.

9.6 In coverings with a load-bearing deck made of profiled sheets, pallets must be provided for the installation of drainage funnels.

9.7 For external organized drainage of water from the roof, the distance between drainpipes should be no more than 24 m, cross-sectional area drainpipes should be taken at the rate of 1.5 cm2 per 1 m2 of roof area.

9.9 Drains must be protected from clogging by leaf or gravel traps, and on operating terrace roofs, removable drainage (inspection) gratings must be provided above funnels and gutters.

9.10 The height of the roof junction at the doors exiting to the covering (roof) must be at least 150 mm from the surface of the waterproofing carpet, protective layers or soil of the green roof.

9.11 In places where there is a difference in heights (with cascade drainage) on low areas of the roof, it should be reinforced with protective layers in accordance with 5.18 of these standards.

9.12 On the roofs of buildings with a slope of 5% (~3°) or more and external unorganized and organized drainage, snow retention devices should be provided, which should be attached to the roof seams (without violating their integrity), sheathing, purlins or to the load-bearing structures of the coating. Snow retention devices are installed in the eaves area above the load-bearing wall (0.6-1.0 m from the eaves overhang), above the roof windows, and also, if necessary, in other areas of the roof.

9.13 When using tubular snow guards a continuous sheathing is provided underneath them. The distance between the support brackets is determined depending on the snow load in the construction area and the roof slope.

When using local snow retention elements, their arrangement depends on the type and slope of the roof, which must be provided by the manufacturer of these elements.

9.14 To prevent the formation of ice plugs and icicles in the roof drainage system, as well as the accumulation of snow and ice in the drainage gutters and on the eaves, installation on the roof should be provided cable system anti-icing.

Appendix A
(required)

List of regulatory documents

Appendix B
(informative)

Terms and Definitions

Calculation
drying capacity of a system of ventilated channels and aeration pipes in the combined roof (roof) of buildings

Coverings (roofs) with roll and mastic roofing

Roofing structures made from rolled and mastic materials

Calculation of roofing carpet for wind loads

Examples of solutions for roofing parts made of rolled and mastic materials

Coverings (roofs) with roofing made of piece materials and corrugated sheets

Examples of solutions for roofing details made of cement-sand tiles

An example of calculating the pitch of the sheathing and the length of a roof made of cement-sand and ceramic tiles

Examples of solutions for roofing parts made of bituminous tiles

Examples of solutions for tile roofing details

Examples of solutions for roofing parts made of corrugated sheets

Examples of solutions for metal roofing details

Coverings (roofs) with roofing made of metal sheets

Examples of solutions for roofing parts made of metal sheets

Examples of solutions for roofing details made of reinforced concrete tray panels

Bibliography

MGSN 4.19-05 "Multifunctional high-rise buildings and complexes"

Hans Peter Eiserloh. Insulation flat roofs. Structural systems - materials - technologies - parts. Ed. House "Business Media". - M., 2007, p. 207-247.

Jozsef Koso. "Roofs and roofing". JSC "Publishing Group "Content". - M., 2007, p. 156-271.

Hans-Jurgen Sterli, Horst Böttger, Heino Walter. "All about ceramic tile roofing." Ed. House "Business Media". - M., 2007, p. 310-366.

Chrysotile cement Construction Materials. Application area. Ekaterinburg; AMB Publishing House, 2009

Klaus Siepencourt. Work on the installation of metal roofs and facades. Materials, processing, details. Ed. House "Business Media". - M., 2007, p. 15-36, 43, 139-157.

RHEJNZINK® - Device Manual metal roofing using the folding technique. - M., 2nd edition, 2008.

Design of roofs of multi-storey residential buildings. Method. decree/ Comp. N.V. Kuznetsova. - Tambov: Publishing house. Tamb. state tech. Univ., 2007, 32 p.

SP 23-101-2004. Design of thermal protection of buildings

Fokin K.F. Construction heating engineering of building envelopes, LLC IIP "AVOK-PRESS". - M., 2006, p. 122.

Retter E.P., Strizhenov S.I. Aerodynamics of buildings. - M.: Stroyizdat, 1968.

Handbook on the climate of the USSR, vol. 3. Wind. - M.: Gidrometeoizdat, 1966.

Idelchik I.E. Guide to hydraulic resistance. - M.: Gosenergoizdat, 1960.

Appendix A (mandatory). List of regulatory documents (not applicable) Appendix B (for reference). Terms and definitions (not applicable) Appendix B (recommended). Calculation of the drying capacity of a system of ventilated ducts and aeration pipes in the combined roof (roof) of buildings (not applicable) Appendix D (recommended). Coverings (roofs) with roll and mastic roofing (not applicable) Appendix E (recommended). Roofing carpet structures made of rolled and mastic materials (not applicable) Appendix E (recommended). Calculation of roofing carpet for wind loads (not applicable) Appendix G (recommended). Examples of solutions for roofing parts made of rolled and mastic materials (not applicable) Appendix 3 (recommended). Coverings (roofs) with roofing made of piece materials and corrugated sheets (not applicable) Appendix I (recommended). Examples of solutions for roofing details made of cement-sand tiles (not applicable) Appendix K (recommended). An example of calculating the sheathing pitch and the length of a roof made of cement-sand and ceramic tiles (not applicable) Appendix L (recommended). Examples of solutions for roofing details made of bitumen shingles (not applicable) Appendix M (recommended). Examples of solutions for tile roofing details (not applicable) Appendix H (recommended). Examples of solutions for roofing parts made of corrugated sheets (not applicable) Appendix P (recommended). Examples of solutions for metal roofing details (not applicable) Appendix P (recommended). Coverings (roofs) with metal sheet roofing (not applicable) Appendix C (recommended). Examples of solutions for roofing parts made of metal sheets (not applicable) Appendix T (recommended). Examples of solutions for roofing parts made of reinforced concrete tray panels (not applicable)

Information about changes:

1 Rolled and mastic

1.1 Non-operational

1.1.1 From bitumen and bitumen-polymer roll materials with fine-grained topping:

with a top layer of rolled materials with coarse-grained topping or metal foil

1.1.2 From mastics:

with a protective layer of gravel or coarse powder

with a protective paint layer

1.1.3 Made from polymer roll materials.

1.2 Operated with a protective layer of concrete or reinforced slabs, cement-sand mortar, sandy asphalt concrete or with a soil layer (with a landscaping system)

1.3 Inversion

2 From piece materials and corrugated sheets

2.1 From piece materials

2.1.1 From tiles:

cement-sand, ceramic, polymer-cement

bitumen

2.1.2 From tiles

chrysotile cement, slate, composite, fiber cement

2.2 From corrugated, including profiled sheets

chrysotile cement, metal profiled (including metal tiles), bitumen

cement-fiber

3 From metal sheets

galvanized steel, polymer-coated, stainless steel, copper, zinc-titanium, aluminum

4 Made of reinforced concrete panels with a tray section with a waterproofing mastic layer

* One dimension (%) of the roof slope is converted to another (degree) using the formula: , where is the roof slope angle; x - dimension in %;

** For roofs made of bitumen and bitumen-polymer roll materials, it is necessary to take measures against sliding along the base. It is possible to perform roofing with slopes greater than 25%, provided that the requirements of Table 3 are met.

4.5 The height of the ventilated channels and the dimensions of the inlet and outlet ventilation openings of the channel depend on the slope, roof area and humidity of the inner layers of the roof (Table 2).

table 2

4.6 In roofs made of metal sheets (except aluminum) laid over a continuous deck, a volumetric diffusion membrane (ODM) should be provided between the sheets and the deck to drain condensate.

4.8 The height of the roof railings is provided in accordance with the requirements of GOST 25772, SP 54.13330, SP 56.13330 and SNiP 31-06. When designing roofs, it is also necessary to provide for other special safety elements, which include hooks for hanging ladders, elements for fastening safety ropes, steps, footboards, stationary ladders and walkways, evacuation platforms, etc., as well as elements for lightning protection of buildings.

4.10 When designing roofs in use, the coating must be checked by calculating the effect of additional loads from equipment, vehicles, people, etc. in accordance with SP 20.13330.

4.11 In roofs with a load-bearing metal profiled decking and a heat-insulating layer made of materials of flammability groups G2 - G4, provision should be made for filling the voids of the corrugations of the decking to a length of 250 mm with materials of the flammability group NG at the junction of the decking with the walls, expansion joints, lantern walls, as well as with each sides of the ridge and valley roof. If two or more layers of insulation with different flammability ratings are used to insulate the roof, the need to fill the corrugations of the decking is determined by the flammability group of the lower layer of the insulating material.

Filling corrugated voids with bulk insulation is not allowed.

4.12 Transfer of dynamic loads to the roof from devices and equipment installed on the covering (roof) is not allowed.

4.13 When reconstructing a combined covering (roof), if it is impossible to maintain the existing thermal insulation in terms of strength and humidity, it must be replaced; If the permissible humidity of the thermal insulation is exceeded, but the strength is satisfactory, measures are taken to ensure its natural drying during the operation of the roof. To do this, in the thickness of the insulation and/or screed or in additional thermal insulation (determined according to SP 50.13330) in two mutually perpendicular directions, channels should be provided that communicate with the outside air through ventilation holes in the eaves, vents at parapets, end walls, rising above the roof of parts of buildings, as well as through aeration pipes installed above the intersection of the channels. The number of pipes and drying time should be determined by calculation (Appendix B).

4.15 In working drawings of the covering (roof) of buildings it is necessary to indicate:

roof design, name and brand of materials and products with links to documents in the field of standardization;

the magnitude of the slopes, the installation location of drainage funnels and the location of expansion joints;

roofing details in places of installation of drainage funnels, drainage gutters and junctions with walls, parapets, ventilation and elevator shafts, cornices, pipes, roof windows and other structural elements.

The working drawings of the construction part of the project must indicate the need to develop measures for fire protection, monitoring compliance with fire safety rules and safety regulations during construction and installation work.

5 Roll and mastic roofs

5.1 Roll roofs are made from bitumen and bitumen-polymer materials with cardboard, fiberglass and combined bases and bases made of polymer fibers, elastomeric materials, TPO membranes, PVC membranes and similar roll roofing materials that meet the requirements of GOST 30547, and mastic roofs - from bitumen, bitumen-polymer, bitumen-rubber, bitumen-emulsion or polymer mastics that meet the requirements of GOST 30693, with reinforcing fiberglass materials or gaskets made of polymer fibers.

5.2 Roofs made of roll and mastic materials can be made in traditional (when the waterproofing carpet is located above the thermal insulation) and inverse (when the waterproofing carpet is located under the thermal insulation) options (Appendix D).

5.3 The constructive solution for a roof covering in an inversion version includes: reinforced concrete prefabricated or monolithic slabs, a screed made of cement-sand mortar or a slope-forming layer, for example, lightweight concrete, a primer, a waterproofing carpet, single-layer thermal insulation, a safety (filter) layer, a weight of gravel or concrete tiles.

In inversion roofing, only slabs with low water absorption (no more than 0.7% by volume in 28 days), for example, extruded polystyrene foam, should be used as thermal insulation.

5.4 In exploited and inverted roofs with a soil layer and a landscaping system, the waterproofing carpet must be made of materials that are resistant to rotting and damage by plant roots. In roofing materials that are not resistant to germination by plant roots, an anti-root layer is provided.

5.5 The number of layers of waterproofing carpet depends on the slope of the roof, the flexibility and heat resistance of the material used and should be taken taking into account the recommendations set out in tables E.1 - E.3 of Appendix E.

5.6 The following can serve as a base for a waterproofing carpet:

reinforced concrete load-bearing slabs, the seams between which are sealed with cement-sand mortar of grade no lower than 100 or concrete of class no lower than B 7.5;

thermal insulation boards, which must be resistant to organic solvents (gasoline, ethyl acetone, nefras, etc.) of cold mastics and resistant to the effects of temperatures of hot mastics; thermal insulation boards made of polystyrene foam and other combustible insulation materials can be used if the conditions of 5.11 are met. Thermal insulation boards made of foam glass, expanded polystyrene and mineral wool boards can have a factory-made inclined surface that provides a slope to the waterproofing carpet;

monolithic thermal insulation from lightweight concrete, as well as materials based on cement or bitumen binders with effective fillers - perlite, vermiculite, foam granules, etc.;

leveling monolithic screeds from cement-sand mortar and asphalt concrete, as well as prefabricated (dry) screeds from two chrysotile cement flat pressed sheets 10 mm thick in accordance with GOST 18124 or from two cement-bonded particle boards 12 mm thick in accordance with GOST 26816, fastened with screws in such a way that the joints of the slabs in different layers did not match.

5.7 The possibility of using insulation as a base for a waterproofing carpet (without installing a leveling screed on it) should be established based on the loads acting on the roof, taking into account the elastic characteristics of thermal insulation (tensile strength, relative elongation, elastic modulus).

The thickness and reinforcement of the cement-sand screed used as a platform for equipment, parking for cars, etc. and laid on lightweight heat-insulating boards (mineral wool, polystyrene foam, fiberglass) are also installed by calculation taking into account the elastic characteristics of the heat-insulating boards.

5.8 Between the cement-sand screed and the porous (fibre) thermal insulation, a separating layer of rolled material must be provided to prevent the insulation from getting wet during the screed installation or damaging the surface of the fragile insulation (for example, foam glass).

5.9 Leveling screeds must be provided with temperature-shrinkable joints up to 10 mm wide, dividing the screed made from cement-sand mortar into sections no larger than 6x6 m, and those made from sand asphalt concrete into sections no larger than 4x4 m. In cold pavements with load-bearing slabs in length 6 m these areas should be 3x3 m.

5.10 Along the temperature-shrinkage seams, provision should be made for laying expansion joint strips 150-200 mm wide from rolled materials with gluing along both edges to a width of about 50 mm.

5.11 Thermal insulation boards made of polystyrene foam and other combustible insulation materials can be used as a base for a waterproofing carpet made of rolled materials without a leveling screed device only when the rolled material is laid freely or when using self-adhesive materials, or with its mechanical fastening, since the fire method of gluing when combustible insulation is unacceptable.

If the thermal insulation boards and the roofing material laid on the thermal insulation are incompatible, a separating layer of fiberglass or geotextile with a density of at least 100 must be provided between them.

5.12 Vapor barrier to protect the thermal insulation layer and the base under the roof from humidification of vaporous moisture in the premises should be provided in accordance with the requirements of SP 50.13330. The vapor barrier layer must be continuous and waterproof.

In places where the heat-insulating layer adjoins walls, lantern walls, shafts and equipment passing through the covering or attic floor, the vapor barrier must be raised to a height equal to the thickness of the heat-insulating layer, and in places of expansion joints it must be placed on the edges of a metal compensator and hermetically glued or welded.

5.13 When fastening the roofing carpet with fasteners, their pitch is determined by calculating the wind load (Appendix E).

5.14 In places where there is a difference in heights, where the roof meets the parapets, the walls of the sides of the lanterns, in places where pipes pass, at drainage funnels, ventilation shafts, etc. provide an additional waterproofing carpet, the number of layers of which is recommended to be taken according to Appendix D.

5.15 Additional layers of waterproofing carpet made from rolled materials and mastics must be extended onto vertical surfaces by at least 250 mm.

5.22 On unused roofs made of elastomeric and thermoplastic rolled materials made by the free-laying method, a slab or gravel loading layer should be provided, the weight of which is determined by calculation for wind load (Appendix E).

5.23 The maximum permissible area of ​​the roof made of rolled and mastic materials of flammability groups G-2, G-3 and G-4 with a total thickness of the waterproofing carpet up to 8 mm, without protection from a layer of gravel or coarse-grained topping, as well as the area of ​​areas separated by fire belts (walls), should not exceed the values ​​​​given in table 4.

5.24 Fire belts must be made as protective layers of roofs in use (5.18) with a width of at least 6 m. Fire belts must cross the base under the roof (including thermal insulation), made of materials of flammability groups G-3 and G-4, to the full thickness these materials.

Table 4

5.25 In places where internal drain funnels pass through the roof, a reduction of 15-20 mm is provided within a radius of 0.5-1.0 m from the level of the waterproofing carpet and the water receiving bowl.

The axis of the funnel must be at a distance of at least 600 mm from the parapet and other parts of buildings protruding above the roof.

5.26 In an expansion joint with metal expansion joints, the vapor barrier must cover the lower expansion joint, and a compressible insulation is provided in the joint, for example, from glass staple fiber according to GOST 31309 or from mineral wool according to GOST 21880.

5.27 In roofs made of bitumen and bitumen-polymer roll and mastic materials, inclined wedge-shaped sides with sides of about 100 mm can be provided in places adjacent to vertical surfaces.

5.28 In places where the roof abuts parapets up to 450 mm high, layers of additional waterproofing carpet can be placed on the upper edge of the parapet, lining the abutments with galvanized roofing steel and securing it with crutches.

In roofs made of TPO membranes or PVC membranes, an additional waterproofing carpet made of these materials can be welded to a drip line made of TPO metal or PVC metal.

5.29 In roofs with a high (more than 450 mm) parapet, the upper part of the protective apron can be secured with a metal clamping strip on self-tapping screws and protected with sealant, and the upper part of the parapet is protected with roofing steel, secured with crutches or covered with parapet slabs with sealing of the seams between them.

5.31 In the eaves area with external drainage, it is recommended to reinforce the roof with one layer of additional waterproofing carpet made of rolled material with a width of at least 250 mm, glued to the base under the roof (in rolled roofs made of bitumen and bitumen-polymer materials), or one layer of mastic with a reinforcing gasket ( in mastic roofs). In roofs made of elastomeric materials (for example, EPDM), the waterproofing carpet is glued to the drip edge, and from TPO membranes or PVC membranes, the carpet is welded to the drip edge made of TPO metal or PVC metal.

5.32 On a ridge, a roof with a slope of 3.0% or more is recommended to be reinforced by a width of 150-250 mm on each side, and the valley by a width of 500-750 mm (from the inflection line) with one layer of additional waterproofing carpet made of bitumen or bitumen-polymer roll material (in roll roofing made of bitumen and bitumen-polymer materials) or one reinforced mastic layer (in mastic roofing) according to Appendix D.

5.33 On roofs with grass and inversion roofs, funnels with a drainage ring to drain water and additional elements made of rot-resistant material, for example plastic, should be used.

6 Roofs made of piece materials and corrugated sheets

In roofs made of piece materials and corrugated sheets }