Requirements for external roof drainage and technology for its construction. Flat roof drainage: specifics of construction of internal and external options Organization of drainage from a flat roof

Making a high-quality and reliable roof today is not particularly difficult - the construction market has never known such an abundance of roofing materials and specialists. But why does it and other house structures begin to collapse ahead of time? One of the main reasons is the absence or insufficient design of the drainage system.

Organized roof drainage ensures directed flow of water from the roof, protecting the foundation, walls and eaves. The latter suffers more than others from high humidity, jeopardizing the integrity of the roof. However, you can count on the efficiency of the system only under two conditions:

• a project that takes into account all the features of the roof;
• competent installation.

Types of organized drainage

Organized roof drainage today comes in two types: external and internal.

Outdoor system

Any external drainage system includes gutters and pipes connecting funnels and other additional accessories to each other. Water is discharged precisely through pipes installed on the facades. According to SNiP, the distance between them cannot be more than 24 m, and for the cross-sectional area of ​​the pipe, a coefficient of 1.5 cm 2 / m 2 is used, relating its value to the roof area. The longitudinal slope of gutters should not be less than 2%. External is suitable for roofs covered with small-piece roofing material, steel, copper, corrugated sheets, etc.

Internal

Another system is internal, consisting of pipes laid inside the house. Even in severe frosts, the water flowing from the roof does not freeze in them. It is also provided for mastic roofs.

Water intake funnels are evenly spaced over the roof area: for every 1 cm2 of the funnel section - 0.75 m2 of area. Roof areas limited by expansion joints and walls are equipped with at least two funnels. They are located in the lowest places, and a distance of at least 500 mm must be maintained between them and parapets or any other protruding part of the building. In areas within a radius of half a meter from the installation sites of funnels, the roof is lowered by 15–20 mm.

Material selection

Based on material, drainage systems are divided into two groups: plastic and metal. They are selected according to the type of roofing. , naturally, metal is more suitable, as for other types, then .

The shape distinguishes between rectangular and round profiles.

The choice of colors is quite wide. The most popular among homeowners are shades of red, brown and green to match the roof covering, and white is a bright contrast in the design. Unlike other criteria, color scheme is solely a consumer preference.

How to make a drain correctly: important rules

In order for the drainage system to work reliably, it is made taking into account specific requirements:

• The gutter is installed with a certain slope towards the waste funnel. The slope should be about 10 cm or 1% for each linear meter of length. In a situation where two drainage pipes are fixed to the wall, the slope should be made in both directions, starting from the middle of the gutter. If there is only one pipe and is located in the center of the wall, the requirements for the device are the same, only in the opposite direction;

• Drainage pipes are not recommended to be located at the entrance to the house or near the garage door. During the thaw period in winter, when the snow on the roof melts, water begins to flow down them, and by morning ice forms at the entrance on the porch and paths.

This, however, can be avoided by installing an anti-icing system.

• It is strictly forbidden to install drain pipes in the internal corners of the building. In these areas, the risk that capacity may not be sufficient to cope with the flow of rain is significantly higher. And in this case, among the likely outcomes are water overflow and violation of the tightness of the elements.

Installation of a system made of metal and plastic - differences

Products made from various materials have certain differences in assembly: metal ones are somewhat more difficult to assemble than those made from PVC; the latter have more small parts and features compared to metal ones. In addition, temperature deformation occurs differently for each of them.

When, in contrast to metal ones, shaped parts are used that are specially designed to compensate for the linear deformation of elements. Products made of metal and plastic are mounted on brackets with different spacing: metal - at most 90 cm, and plastic - up to 60 cm.

To assemble all plastic elements, special glue or rubber seals are used.

Whatever material the gutter is made of, it must be protected from falling under an avalanche of snow and ice, which can cause deformation. Therefore, snow holders are installed on the roofs, which must correspond to the type of roof, for example, tubular ones are used for metal tiles, and lattice ones are attached to natural ones.

External roof drainage is an important system for protecting a building from rain and melting snow, because its purpose is to collect water from the roof slopes and drain it into the storm drain. The article discusses what types of drainage systems there are and by what principles they are installed on roofs.

Types of drainage systems

There are three main varieties:

Disorganized external drain. Essentially, this is a roof cornice that extends beyond the wall by at least half a meter.

Outer organized roof drainage. This is a system that includes trays, also known as horizontal gutters, and vertical pipes installed in the form of risers.

Organized internal. This system is only used on flat roofs. We will talk about this variety in a separate section.

Now we will deal with the external drainage system.

External drainage system

As already mentioned, it consists of: gutters located under the edge of the roofing, pipe risers. Both parts of the system are connected to each other by funnels. In addition to these elements, the drain includes:

brackets, as fastening elements for gutters;

clamps, with the help of which pipes are attached to the walls of the house;

couplings which are used to connect gutters and pipes;

pipe bends at 90 and 45 0;

drain pipe branch, used at the very bottom of the drains.

Materials for gutters

Today, manufacturers offer two materials from which drainage elements are made: galvanized steel (painted or coated with a polymer layer), plastic. Note that metal products are more expensive, but will also last longer on the roof. As for installation and assembly technology, both types are no different from each other.

But plastic gutters are not as noisy as metal ones, and they are neutral in mildly aggressive environments. Today, manufacturers offer drainage systems made of polyvinyl chloride and a special type of vinyl. The latter has high performance characteristics. Pipes and trays made from it do not crack in frost, which often happens with PVC. Therefore, they are recommended for use in the northern regions of the country.

It should be noted separately the gutters made of copper. An expensive option with a long service life. And in terms of decorative qualities, it is superior to plastic and galvanization, although the latter two are presented on the market in a huge range of colors. Unfortunately, copper products are rarely used in private housing construction - many people cannot afford it.

How to correctly calculate an external drainage system

This mainly concerns the elements of the system. The number of gutters depends on the length of the roof eaves. For example, if a gable roof is 10 m long, then the length of the eaves is 20 m. Accordingly, the length of the purchased trays, in general, should be 20 m. And since the standard gutter length is 3 m, this means that the quantity is determined as follows: 20:3 =6.6, round up - there will be 7 pieces.

With pipes it's a little different. Firstly, the length of the riser depends on the height of the building wall. Secondly, the number of pipes depends on how many risers will be installed on the roof. Here the ratio is:

if the length of the roof eaves is within 10 m, then install one boner;

if more than this value, then several risers.

But in the latter case, it is taken into account that the distance between the risers should not exceed 20 m. Knowing the height of the wall and the number of pipe risers, you can determine the number of pipes on the basis that one pipe has a length of 3 m.

By the way, the number of risers determines the number of funnels and lower drain pipes. They are equal to each other in quantitative terms. But there will be twice as many bends.

On our website you can get acquainted with the most . In the filters you can set the desired direction, the presence of gas, water, electricity and other communications.

As for brackets for trays, their number is determined by the installation step of fasteners, equal to 50-60 cm. But keep in mind that the first and last brackets are installed from the edge of the grooved structure at a distance of 30 cm. As for clamps for pipe risers, the distance between them – 1.8-2.0 m. But if the wall height exceeds 20 m, then the installation step is reduced to 1.5 m.

These were calculations of the number of elements. But there are also dimensional parameters - the diameter of the pipes and the cross-section of the tray. Since the standard size presented by the manufacturers corresponds to the standard parameters of pipe products, accordingly, the drainage capacity of the drainage elements is different. A simple relationship applies here - the larger the area of ​​the roof slope, the greater the drainage capacity the drainage system should have. And this depends on the diameters of pipes and trays. Therefore, we propose the ratio of the slope area and the diameters of pipes and trays:

up to 30 m²– pipe diameter 80 mm, gutters diameter 100 mm;

30-50 m²– pipe 87 mm, tray 100-120;

50-125 – 100 and 150 mm, respectively;

Over 125 m², pipe 110 mm, gutter 150-200 mm.

Video description

Gutter installation rules

The external drainage system is a gravity flow system, so the gutters are laid at an angle of 2-3 mm per 1 m of the length of the channel route. This important circumstance is taken into account during the installation of brackets. This is done this way if, for example, two risers are installed on the wall at the corners of the building.

Determined middle of the cornice.

He received the label in two different directions lay 30 cm.

In these places mounted on a bracket at the highest point. The two fasteners must be located at the same horizontal level.

For example, if the length of each part is 10 m, then incline grooved design determined according to the following scheme: for each meter 2 mm, it turns out 2 cm for 10 m.

Retreat from the edge of the corner of the house 30 cm and at this point a bracket is mounted, which is 2 cm lower than the one already installed.

Now between two brackets pull a strong thread. It is located at an inclination of 2°.

Exactly according to her install intermediate brackets in increments of 50-60 cm.

So install brackets on both sides from the middle of the roof eaves.

All that remains is to lay the trays on top of the brackets. Today on the market you can buy gutters with a socket connection and with a coupling connection. The first one is simpler, there are fewer additional elements. The design of each gutter has a reduced diameter on one side, which fits tightly into the other side of the tray, where the diameter is standard. It is recommended to treat the junction of two gutters with silicone sealant to increase the tightness of the connection.

Plugs are installed at the edges of the trays. A funnel is installed at the location where the pipe risers are installed. By the way, water inlet funnels for external drainage are presented on the market in two design types: a standard funnel and a gutter with a branch pipe that enters the riser pipe using a socket connection system.

Installation of risers

It’s easier here because the riser is positioned vertically. That is, you need to draw a vertical line from the funnel to the ground on the wall using a plumb line. Then mark the installation of clamps, which are immediately attached to the wall with anchors or self-tapping screws on plastic dowels.

There are several points to pay attention to:

The lower clamp is installed at the junction drain with pipe.

The lower end of the drain pipe should be located above ground level at a distance of 25 cm. This is precisely the starting point of the marking.

Now let’s talk about how to properly connect a pipe riser to a drain funnel for external drains. Since the length of the cornice in different roofs is different, the length from the funnel to the riser will also be different. Firstly, you can’t do without two taps here. Secondly, if the length of the cornice is large, then a piece of pipe from the drain will have to be installed between the branches.

In fact, the installation process is not very complicated if you strictly follow the information provided above. Our craftsmen can easily install the drainage system of one house in one working day. That is, it takes a little time.

Video description

We invite you to watch a video that shows the entire installation process, so to speak, from “A” to “Z”:

All about internal drainage

So, let's move on to the topic - the internal drainage of a flat roof. It is called so because the vertical pipe through which rainwater moves from the roof slope down into the sewer system is located inside the building. And on top of the roof itself a funnel of a special design is installed. It is covered with a mesh filter to prevent debris from getting inside the drain pipe.

There are some requirements for internal drainage:

for every 150-200 m² of slope area install one funnel;

slope towards the funnel lay down at an inclination of at least 4°;

diameter pipes are selected at the rate of 1-1.5 cm² of its cross-section per 1 m² of roof area;

soft roof is laid on the sides of the funnel;

riser must be located in a heated room;

On a note! The riser is connected to a drain pipe, which is laid at a slope of 2-5° towards the storm drain under the house, and the pipe crashes into it;

it is forbidden install a funnel near the wall of the building.

Construction of the internal drainage system begins before the foundation is laid. That is, they lay a drain pipe. If the foundation has already been poured, then a hole is made in it with a hammer drill to the diameter of this pipe, where the latter is inserted. Today, the horizontal drainage section of the drainage system is often laid under the floor of a house on the first floor or in the basement under the ceiling. This greatly simplifies the installation process. But here you will have to make a hole in the foundation anyway. To avoid this in the foundation structure at the stage of its construction, it is better to leave a hole by inserting a piece of pipe of a larger diameter when pouring.

The riser is laid inside the service premises. Therefore, the location of its passage through the floors is determined in advance in the project, in which through holes are left or made. Subsequently, after installing the drain, they are sealed and insulated. The main task of the work manufacturer is to carry out installation with complete sealing of the joints. Therefore, the places where pipes connect to each other, as well as to fittings, must be treated with silicone sealant. At least one revision must be left in the riser. This is in case the drain pipe becomes clogged.

The most important stage in the construction of an internal drain is the installation of a water intake funnel. Here, 100% sealing is required so that precipitation does not penetrate under the roofing material.

Video description

Watch the video to see what requirements apply to the water intake funnels of the external drainage system:

Conclusion on the topic

So, we tried to give complete information on the external drainage system and touched a little on the topic of internal drainage. In fact, this system is not complicated, because it consists of only two sections, and its equipment is not wide. The main thing is to accurately connect the parts of the system to each other. Although this is not difficult to do, because the manufacturers have taken care of maximum ease of assembly.

The drainage system is used to drain precipitation from the roof into a storm drain or other place for collecting water. An organized drainage system protects foundations and walls and prevents the formation of puddles around the house.

Depending on the location, drainage systems can be internal or external. The internal drain is installed inside the building before finishing work is carried out. It is installed on flat roofs, as well as in regions with a high probability of water freezing. External roof drainage is more common. Its installation is carried out upon completion of all construction and finishing work.

The advantages of such a drainage system are obvious:

ease of installation and dismantling;

no need for specialized skills and tools;

ease of maintenance.

Materials for drainage system

Currently, external roof drainage can be made of metal or plastic. For metal systems, galvanized or carbon steel, titanium, copper, and aluminum are used.

The choice of material depends on various factors:

Type of roof. On an elite building, plastic pipes look ridiculous; copper or titanium are more appropriate here.

Easy to install. The easiest way to install a drain is made of plastic.

Resistance to mechanical damage. The best properties are found in steel, copper and titanium.

Weir elements

External roof drainage consists of a number of elements, the number of which depends on the size and design features of the building. Gutters are horizontally installed parts for draining water. By location there are: cornice, parapet, and groove. Parapets are mounted between the parapet beams. The grooves are placed at the junction of several slopes.

According to the cross-sectional option, gutters are divided into semicircular, square and embossed. Square ones are used in areas with high precipitation. Embossed ones serve to protect against debris, leaves, etc. Internal and external corners are designed to outline the roof elements. The gutters are fastened using brackets with a pitch of 50 cm. Plugs are installed at the ends of the gutters.

The second element of the external roof drainage is the drainpipe. Its cross-section must coincide with the cross-section of the gutter. For roofs whose area exceeds 200 m2, it is recommended to use square pipes. According to SNIP, for roofs with an area of ​​up to 30 m2, pipes with a diameter of 80 mm are suitable, for roofs from 50 to 125 m2 - with a diameter of 90 mm, and for an area of ​​more than 125 m2 - 100 mm. The pipes are secured using clamps. The gutters and pipes are connected to each other by drainage funnels. Special nets are installed on them to retain debris. The joining of various elements takes place through couplings.

Organized external drainage from the roof provides for the flow of water into a storm sewer, but it can also simply be discharged onto the ground at least 60 cm from the foundation.

Installation of external roof drainage

The event is held in two stages:

First- development of a drainage system project. It includes drawing up an estimate and plan for future work. At this stage, taking into account the area of ​​the roof, its design features and angles of inclination, the required number of gutters, pipes, funnels and fasteners is calculated.

Second phase- installation of a drain. In addition to the parts of the drainage system and assembly instructions, the following tools are needed: drill, saw, hammer, screwdriver, as well as nylon thread.

Installation is carried out in the following order:

A properly installed drain from the roof of a house will provide reliable protection for the façade of the building from the negative effects of precipitation. The gutter is designed to drain stormwater and melt water from the roof, thereby preventing it from flowing down the walls of the house and undermining the foundation. Installing drainage from pitched roofs is a simple matter; you can cope with the task without calling specialists. Let's look at how this happens in practice.

Why can't the roof be left without a drain? Many houses have rather unusual and beautiful roofs, and their owners want to abandon the arrangement of this important system only because they do not want to spoil the appearance of the roof and the building as a whole. After all, a drain is a system of gutters and pipes that do not look as elegant as, perhaps, the house itself. But making such a decision will be fundamentally wrong - no matter how beautiful and unusual the house is, it needs drainage from the roof.

First of all, The drainage system protects the building from the effects of precipitation on the facades and foundation. Water dripping from the sky is far from the cleanest liquid; it contains a lot of chemicals, and in some regions, literally the entire periodic table. And some building materials, under its influence, begin to quickly lose their appearance and collapse, which is why the structure no longer becomes as strong and reliable as it was originally. And wet walls lose some of their heat-saving properties and look ugly.

On a note! A roof drainage system does not always look simple or unsightly. Now you can make components of any shape and even adjust them to the style of the entire structure, which means they won’t look tacky.

The drainage system operates simply: water that gets onto the roof is collected in one gutter, through which it is directed to a certain point of the so-called safe drainage. And if the system is designed correctly, then it reliably protects both the foundation and walls from water.

Organized roof drainage

Types of drainage

Prices for gutters

Gutters

Drainage from pitched roofs can be organized in three ways:

• unorganized when water naturally drains from the roof under the influence of gravity, falling on the walls and flooding the blind area;
• organized internal when the roof drainage system is located inside the building;
• organized outdoor, consisting of pipes, gutters and funnels located on the outside of the building.

On roofs with slopes, unorganized and external organized drains can be installed. Moreover, the former are used less and less often - builders give preference to the latter, despite the need for additional investments in construction and a certain number of works.

Previously, in Russia there was often no system for drainage from roofs - simply the roof outlets were made larger and the water flowed down them to the ground. More precisely, it was called just an unorganized drain. But in this case, special requirements were placed on the foundation of the building, and the surrounding area around the house had good waterproofing. This method is still relevant and used, but it is still usually installed only in regions with minimal precipitation (no more than 300 mm per year). All possible conditions for its arrangement can be found and read in SNiP 06/31/2009.

SNiP 06/31/2009. Public buildings and structures. Downloadable file (click the link to open the PDF in a new window).

Such drainage can be used if the height of the building does not exceed 5 floors, and the roof itself must have one slope, the slope of which is directed towards the courtyard inside the personal plot. In this case, the roof must be equipped with a canopy that extends beyond the roof by at least 60 cm. Also, under such a drain there should not be any paths for transport or people. The only advantage of such a drainage system is that there is no need to invest in roof drainage work.

Unorganized drainage does not provide protection to the foundation; rather, it will reduce its load-bearing capacity. Also, over time, it will cause destruction of both the finishing of the walls and the base.

The best option for organizing drainage from pitched roofs is external drainage. Thanks to it, the water will be located only outside the building, collecting on the roof, and flowing only to a certain place. And such a drain itself is easy to install and does not require any special costs.

On a note! Internal organized drainage, provided that the roof has slopes, is used very rarely, as it is a complex internal system of channels. This type of drainage can be found in industrial facilities.

Structure of the drainage system

For a roof drainage system to work correctly, it must include all the necessary elements. Despite the fairly simple device, it must contain the following design details:

Table. Materials used to manufacture the system.

System calculation

To cope with the flow of water, the drainage system must have certain sizes and shapes. They directly depend on the amount of precipitation in the region, the size of the building and other factors.

The calculations are based on the drainage area - it is on this that, first of all, the parameters of the gutter and pipes will depend. For example, for small country houses (water collection area less than 30 m2), it is enough to purchase a drain pipe with a diameter of 50-75 mm, and a gutter with a cross-section of about 70-115 mm. For modest cottages (collection area does not exceed 50 m2), a pipe with a diameter of 75 to 100 mm and a gutter with a cross-section of 115-130 mm are suitable. But for buildings with large roofs (collection area - about 125 m2), you will have to purchase drain pipes with a diameter of at least 90-160 mm and gutters with a cross-section of 140-200 mm.

The effective liquid drainage area can be calculated using the formula S=(B+1/2H)xL, where B is the length of the horizontal projection of the edge of the roof slope, L is the length of the roof, and H is its height. All values ​​are used in meters.

When calculating the cross-section of the pipe, the angles of inclination of the drain must also be taken into account, because if they are insufficient, the gutter will quickly fill with water, which simply will not have time to flow down it. And at a large angle of inclination, the funnel of the drainage system will choke. For 1 linear meter of gutter, the slope should be approximately 2-5 mm.

On a note! The distance between adjacent funnels in the system should not be more than 24 m. It is best to place them 8-12 m from each other - then it will be possible to achieve a slight inclination of the gutters.

The cross section of the funnel is also easy to determine. It is enough to estimate that per 1 m 2 of roof in horizontal projection there is about 1.5 cm 2 of the cross-sectional area of ​​this element. It is also important to remember that one funnel can collect water from approximately 10 m of gutter. To simplify calculations, you can use online calculators.

The number of internal and external corners is easy to calculate - only the configuration of the structure is taken into account here. And the number of brackets is calculated depending on the total length of the gutters, and it is important to remember that their installation step is 50-60 cm for metal systems and only 30-40 for plastic structures, provided the gutter slope is up to 1 cm for every 3-4 m. Where the funnel is installed, the fastening elements must be secured at a distance of at least 15 cm from it. The same applies to the junctions of gutters, corners and plugs.

Installation features

The technology for installing a drainage system from a pitched roof is simple, but has a number of nuances that must be taken into account. One of the most important is the correct method of fastening, because this will determine how strong and reliable the system will be. The brackets must be securely screwed to the front board, sheathing or rafters at a certain pitch. Installation is carried out until the final finishing of the roof. If they are not secured correctly, the structure will begin to sag over time, causing the gutters to leak.

An important point is the correct installation of the gutters themselves. They should be positioned so that they are partially covered by the edge of the roof - approximately 1/3. In this case, it will be possible to achieve the most efficient collection of liquid. In this case, the edge of the gutter should be located approximately a couple of centimeters lower than the slope itself - in this case, the gutter will not be damaged when snow and ice melt from the roof.

The connection of two gutters is a moment that also requires special attention. They can be fastened with glue (if they are made of plastic), couplings and seals (for plastic or metal gutters) or by soldering (the method is optimal for copper structures).

On a note! PVC products may change slightly in size due to temperature changes, so it is recommended to connect them so that they retain some mobility. Otherwise they may become deformed.

The drain pipe itself, located vertically, should be located as close as possible to the wall of the house and secured with clamps. This will increase its resistance to wind. Individual sections of pipes, as well as pipes with funnels, are also connected using special connectors.

By the way, as for clamps for drain pipes, in the upper part, near the roof, the pipe is fixed with a rigid clamp, and in the middle or lower with a loose clamp. The distance between them should be approximately 2-2.5 m.

The runoff can be discharged directly into an underground stormwater system through a storm well, if one is available. You can also consider other options for recycling rainwater.

Installation of a drainage system

Let's look at how to install a drainage system manufactured by Vinilon.

Step 1. To install and assemble the system, you will need the following tools: a screwdriver, a miter box, a hacksaw, a bender, a construction level, a tape measure, twine and a marker.

Step 2. Anti-corrosion fasteners are used to secure all parts of the drain. It can be purchased at a hardware store.

Step 3. The drainage system is installed from top to bottom. First, the drainage gutters are attached, only after that the drainage system (drain pipes) is installed. Drainage gutters are installed below the level of the roof slope with a slope towards the funnel of approximately 2-3 cm every 10 meters of the gutter. For ease of work, markings are applied to show the mounting locations of the brackets.

Step 4. The funnel is installed first at the lower mark and the bracket at the upper mark. A string is stretched between them, along the level of which the remaining brackets and couplings are attached. In this case, the brackets are installed so that the distance from them to the edges of the funnel or coupling is no more than 10 cm. There can be a distance of about 60 cm between the remaining brackets.

Step 5. After installing the brackets, the gutter is fixed to them.

Step 6. The joining of two sections of gutters is made using a special coupling.

Step 7 The corners connecting the gutters in the corners of the house (internal and external) are fastened. Plugs are installed at the ends of the gutters.

Step 8 Installation of the drainage system begins. To do this, you will need clamps to secure the pipe. It is rigidly fixed in the upper part, and in the lower part it is fixed with slipping.

Step 9 An elbow is attached to the drain funnel, which, using a piece of pipe, is connected to another similar elbow, but oriented in the other direction. This will bring the drain pipe as close as possible to the wall of the house. The second elbow is fixed to the wall using a clamp attached to it. This section is being assembled.

Step 10 Clamps for the drain pipe are attached to the walls at a distance from each other (maximum 1.7 m).

Step 11 The drain elbow is attached at a distance of 25-30 cm from the ground. All parts are installed strictly vertically according to the building level.

Step 12 Pipes from the top of the couplings and drain are always installed until they rest against the internal stop of the element, from below - to the line marked on the system.

Step 13 After installing all pipes, intermediate clamps are installed and all elements are tightened.

Video - Drainage device

Do-it-yourself drainage installation from sewer pipes

A country house can be equipped with a drainage system made from ordinary sewer pipes. Let's see how it's done.

Step 1. A pipe 4 m long, having a fairly large cross-section (about 110 mm), is cut lengthwise into two halves. The most convenient way to do this is with a grinder.

Step 2. The pipe halves are connected to each other and fastened with self-tapping screws.

Step 3. A drain funnel is formed. To do this, connect a piece of pipe and a cross with an elbow. After fixing, markings are applied in the middle of the pipe and continued onto the cross. The assembled elements are cut according to the markings.

Step 4. To fix the gutters under the roof, you can use factory brackets or make them yourself from metal. They are screwed to improvised gutters.

Step 5. The gutter is installed along the roof slope.

Step 6. The drain pipe is assembled, connected to the gutters and fixed to the wall of the building.

Prices for popular models of screwdrivers

Video - Creating a drain from pipes

Installing a roof drainage system is not as difficult as it seems at first. In the construction industry, there are much more labor-intensive and time-consuming activities. Here, if desired, you can quickly manage to ensure proper drainage of water from the roof.