home · Measurements · Protective cap for ceramic chimney. A cap for a chimney pipe: how to make it yourself or choose a ready-made one. Based on these indicators, they select

Protective cap for ceramic chimney. A cap for a chimney pipe: how to make it yourself or choose a ready-made one. Based on these indicators, they select

A cap (smoke, weather vane, head, umbrella) is an additional protective device for brick pipe chimney. The design serves as a decorative part and serves as protection against weather factors, precipitation and accumulation of debris. The chimney increases the draft in the pipe and the proper removal of combustion products from the chimney. The caps are made from any type of metal - steel, zinc, copper, aluminum, which last 8-10 years. In great demand They use forged umbrellas with different figures on the lid.

What is the cap used for and how does it work?

Smoker for brickwork- a universal device that is attached to the chimney head, providing an aesthetic appearance. The head may have different design and performs the following functions in the smoker’s work:

  • Protection of the chimney pipe from the influence of precipitation. When there is a large amount of water or snow, condensation accumulates on the inner walls, which can form a plug. The weather vane reduces the likelihood of precipitation getting inside.
  • Maintaining the strength of brickwork. Due to protective cap the impact of atmospheric changes on brick is reduced. Inner material the channel is less susceptible to weather influences and lasts 2 times longer.
  • Filter. Modern weather vanes are made with a special recess and with a protective mesh fastening, which prevents debris, branches, birds and various debris from entering the smoker channel.
  • Increased traction. There are many attachments with a built-in deflector to increase traction, but even the ordinary mushroom shape helps to increase it.
  • Preservation of heat in the house. Due to the closed head, the calorific value is preserved quite long time, wandering of the draft in the channel is minimized.

Types of hoods


Designs can be found on sale rectangular shape.

The design of the chimney is selected according to the size of the smoker pipe. The nozzle varies in shape: round, square and rectangular. The main options are a roof with a flat umbrella, a chimney with a hipped or semicircular roof, a cap with a cone-shaped umbrella, a roof in the form of four gables, and weather vanes with an opening lid. A forged cap is often made with an ornament, a spark arrester and is complemented by various types of figures.

How to choose the right type?

Caps differ in size, structure, material and depend on the type of outlet design. When choosing a chimney cap, you need to know the pipe structure and dimensions. For brick smoker with solid fuel system Any design is suitable for heating, but they often choose a chimney with a hipped roof. The best option A three-layer structure is used, because the presence of such a model carefully protects the chimney from precipitation, and moisture is collected in a special collection box. A cap with a cone-shaped umbrella is more suitable for a pipe with a round cross-section.

When choosing a weather vane with a built-in weather vane, a special damper is inserted, which in windy weather facilitates uninterrupted smoke removal and also facilitates cleaning of the smoker. But it is also advisable to install a protective mesh under the umbrella to prevent various debris from getting into the pipe. Important Tips when choosing:


To make the channel ventilated more efficiently, you can purchase a two-story type product.
  • Painted chimneys are not suitable for pipes wood stoves due to the rapid fading of paint.
  • Double-decker hood models allow for better ventilation in the channel.
  • A device with a built-in deflector provides the greatest draft in the smoker.
  • Double-sealed hoods provide excellent tolerance high temperatures air.
  • The chimney with a hinged lid makes the pipe easy to clean.

When choosing a hood, it is necessary to select the correct dimensions, then the smoke hood will be installed correctly and will perform its functions normally.

A mixture of gases with fuel combustion products from fireplaces, stoves and heating boilers exits through the chimney into the street. Looking at private houses, you will notice that the head of the pipe is crowned with a special canopy or umbrella. At first glance at these devices, decorated with figured forging, intricate patterns and figures, one gets the impression that they are just a decorative element. In fact, the chimney cap is important element smoke removal systems, the correct design and installation of which affects the efficiency of its operation. This article will tell you about the principles of operation, types and methods self-made do-it-yourself deflectors.

A chimney cap is a device that resembles an umbrella or canopy in appearance and is installed on the head of the chimney to protect against moisture. There are a huge number of variations in the appearance of weather vanes, depending on the shape and size of the smoke exhaust duct. The design of all types of hoods consists of the following elements:

Important! For the chimney, you can make a cap with your own hands from sheet metal, however, more complex models easier to buy or order. The most convenient type to maintain and operate is a protective umbrella with an opening lid. Due to the mobility of this element, the protective visor is not removed during.

To make a durable cap, sheet metal that is not subject to corrosion is used. DIY production from galvanized steel, copper or aluminum is common. An umbrella with a copper head has a noble shade, it looks respectable, but often becomes a “victim” of non-ferrous metal collectors.

Varieties

The abundance of shapes and types of chimneys force manufacturers to produce caps of various shapes, styles, and sizes. In construction stores you can find the following types of products:

  • Standard weather vane. Her umbrella is a pyramid made of sheet metal, attached to a drip apron using brackets.
  • Four-slope weather vane. The top of such models resembles a hipped hip roof. As a rule, they are used for rectangular brick pipes.
  • Wind vane with a semicircular umbrella. It is used for installation on the roofs of European-style houses. In terms of increasing traction, it has low efficiency, however, looks beautiful on a slope.
  • Flat weather vane. It is equipped with a flat rectangular umbrella and is used for buildings in the minimalist and modernist styles. Flat cover The cap does not allow snow to roll off, which is why the brackets of such models experience increased load and sometimes become deformed.
  • Round weather vane with a cone-shaped umbrella. Used to protect pipes round section made of stainless steel, such models are not equipped with a drip.

Note! Wind vanes are equipped with additional functional elements: dampers, double roofs, folding doors. Don’t get carried away with elaborate details, because the main thing in choosing a deflector is durability and efficiency. An ill-conceived shape can cause noise or vibration in the pipe.

Operating principles and functions

The chimney cap not only protects against debris and water getting into the smoke exhaust channel, it affects the draft force. Air flow, moving horizontally or at an angle, splits and goes down, this causes a “suction” effect. Thanks to this, a zone with reduced pressure is created, into which smoke from the firebox rushes. The protective deflector performs the following functions:

  1. Prevents moisture from penetrating into the chimney pipe. Dampness in the chimney increases fuel consumption and creates favorable conditions for the spread of fungus.
  2. Closes the pipe opening from branches, leaves, debris, as well as nesting birds. An umbrella reduces the risk of fire and blockages. Thanks to it, the chimney becomes less clogged and functions more efficiently.
  3. Optimizes the operation of the chimney. A correctly selected canopy increases the efficiency of the chimney by 10-15%. And with the help of special aerodynamic deflectors with turbines they solve the problem of lack of traction.

Important! Although a chimney protective umbrella is considered a decorative element, it is primarily functional element smoke removal. A properly selected deflector should not create noise or vibration inside the chimney duct.

DIY making

To make a chimney canopy with your own hands, it is better to choose a simpler model. To work you will need galvanized steel sheets, metal scissors, bends, a marker, cardboard, welding machine. The process is performed in the following order:

Important! The easiest way to make a chimney cap with your own hands is to make it from a sheet of metal curved in an arc. When creating a drawing, keep in mind that winter period the brackets bear the weight of the snow cap, so choose metal of sufficient thickness and strength.

When making your own umbrella to protect the chimney from moisture penetration, accurately measure the dimensions of the pipe. A correctly selected deflector model improves the appearance of the roof and optimizes the operation of the smoke removal system.

Video instruction

The cap on the chimney pipe retains its durability and reliability for a long time; it can be made with your own hands or purchased at finished form. When choosing the first option, you need to determine what product you need to get. This can be a complex design with creative design and many additional functions or a simple model.

Choice of shape and material

The chimney cap was invented quite a long time ago. It solves several practical problems:

  • protects the chimney from external factors: rain, snow and wind;
  • acts as an additional roof decoration.

It is important to provide, first of all, protection from wind and precipitation, otherwise the walls of the chimney will be destroyed under the influence of weather conditions.

TO The cover should be selected in accordance with:

  • channel type;
  • hole diameter.

Based on these indicators, select:

  • a cap made of chrome and nickel if the house is heated with gas;
  • a removable product if the apartment is heated by a fireplace, solid fuel boiler or wood stove.

The main types are models with a round and square base, stationary or folding, made of tin - chromium-nickel or black. Many modifications are unfounded. They are fixed directly to the chimney duct.

Today, chimneys made of galvanized or stainless steel and copper have appeared. It is also possible to select modifications so that the shade of the cap matches the color of the roof. The selected option must correspond in functionality to the specific type of pipe. It should also match the style of the building.

Architectural form

Concerning architectural form cap, then a multi-slope weather vane can perfectly protect against precipitation and snow. This chimney looks very impressive, especially if you place figures of any animals made of metal on top.

Models with a flat surface are more often used. There are caps with an opening lid, which are also popular. They are convenient for preventive maintenance and unhindered maintenance of the chimney. The deflector, which has a ventilation hole in its body, significantly improves traction.

But the smoker is not always used. There is virtually no need for it in areas where there is rarely precipitation and virtually no wind. But for Russian latitudes it is a necessity.

Chimney umbrella

A chimney hood can be installed for several reasons:

Installing the hood

Here you should focus on safety and practicality. The last thing you need to think about is the external attractiveness of the structure. It is important to consider the following recommendations:

It is recommended to install hip or gable hoods on smoke exhaust blocks made of brick and equipped with side vents. Thereby top part the masonry will be protected from precipitation and wind. In this case, contact with the gas duct openings on the sides will be excluded.

For guard brick block, where the chimneys and exhaust pipes, you can make a box with several through pipes. They, in turn, are inserted into the specified channels. Conventional mushroom-shaped caps are installed on top of the ventilation terminals, while conical nozzles must be installed on gas terminals.

Making a visor

You can make a cap for the chimney pipe with your own hands. The drawings will help you navigate this, but it is important to follow all the parameters specified in it. First of all, you need to determine the external dimensions of the head. The umbrella will be attached here. Following this, you need to sketch a sketch depicting the future structure. To do this correctly, you need to consider the following points:

  • the diameter of the product must be more sizes pipes by 10 cm so that the edges protrude on all sides up to 50 mm;
  • slope angles should vary from 30 to 45 degrees;
  • from the chimney cut to the fungus minimum height should be 100 mm.

The umbrella is traditional solution . There are other design options:

  • rotating weather vane;
  • deflector.

The latter makes it possible to increase traction through wind pressure. Thanks to it, a vacuum is created in the cylindrical body, where it passes smoke channel. In calm weather, this device retains all its positive traits. At the same time, it reduces the traction force in the pipe, which results in increased resistance at the exit of combustion products.

A semi-cylindrical weather vane is often popularly called a “sycophant” because it turns with the wind. It is mounted on a special bearing and consists of several components. This is one of best options, but doubts arise about the reliability of the bearing, and the price of such a design is high. It is especially good to install such a model on a round chimney, as it protects the mouth of this device from precipitation and blowing out.

To make a chimney for a canopy with your own hands, it is better to use painted or galvanized metal, the thickness of which is at least 0.5 mm.

Making a Simple Round Umbrella

To perform such work, you need to prepare tools: a drill, metal shears, a hammer and equipment for installing rivets. Once the size of the fungus is determined, perform the work in the following order:

Using steel strips, legs for the fungus and a clamp encircling the pipe are created. They take thin sheets that are bent several times. These parts are similarly secured to the umbrella with rivets.

Gable model

To make a gable weather vane, you need to use a machine called a sheet bender.

Just as in the previous case, first take measurements of the outer surface brick chimney. Calculate the pattern and make the corresponding diagram. Next, the cap is assembled using a simple algorithm.

You need to cut the metal and bend it following the dashed lines. The resulting parts must be connected with rivets. The function of rigid racks is performed by ready-made painted metal corners, the thickness of which varies from 0.5 to 0.7 mm.

European cap

This model is more designed to prevent the formation of condensation and has rounded look. A chimney of this type can be made independently using a steel sheet and hand-made holders.

How to make a European cap:

It is permissible to use a regular chimney pipe clamp to mount such a cap on the pipe.

To make a European cap, all you need is a piece of sheet metal and a grinder disc.

With spark arrester

Sometimes a standard hood is equipped with a mesh with a spark arrester. It acts as a bonus to the main functions of the object. Thanks to this component, birds cannot get inside the chimney. This creates a barrier for wind-blown debris. But the mesh must have fairly large holes so that the smoke can easily escape from the pipe. Spark arrestor caps made of copper look especially beautiful.

Installing the deflector

Its effectiveness has been proven by many owners of houses and cottages who have used this model. Despite the fact that the price of such products can reach up to $140 for standard designs, the demand for them remains constant.

In order not to overpay, you can make the described device yourself. The whole process will take no more than 3 hours. It all depends on the skills of the collector. At the first stage, a drawing is created, after which the blanks are made. Next comes the assembly of the device and its installation on the chimney, followed by fastening.

Before drawing drawings, you should calculate the diameter of the outlet pipe and the diameter of the cap. It is also important to measure the height of the deflector itself. To prevent mistakes at this point, special formulas will help:

  • height=1.6−1.7 x diameter;
  • diffuser width=1.2−1.3 x diameter;
  • cap width=1.7−1.9 x diameter.

After drawing the outline of the blanks on paper, you can proceed to creating metal blanks. It is better to take stainless or galvanized steel, the thickness of which varies from 0.5 to 1 mm.

After preparing the metal pattern, you can begin the assembly stage of the product. You will need a drill for this. , riveter or welding. If preference is given last option, you must be as careful as possible so as not to burn through the deflector section.

The cap is secured to the base with legs, which are drawn in the same way on paper and then cut out from a sheet of stainless steel. When all these stages have been completed, only the most crucial moment remains - installation on the chimney.

Drill holes on the pipe to secure the deflector. Rivets are fixed. After this, you need to check whether there is a slope in different directions installed device. Installation of a clamp will be required if the deflector is loose. If the pipe is not made of brick, this option will come in handy. If we are talking about a ceramic pipe, then you will have to use special adapters.

Caps on chimneys They perform not only a decorative function, they are needed to protect the pipe from precipitation. Also, such designs allow you to increase draft in the chimney. But to protect the chimney, you need to choose the right deflector. Installing caps on pipes helps protect them from debris and enhance traction.

Types of hoods

In stores you can find the following types of products:


Important! Wind vanes can be equipped with additional elements.

For example: when choosing a pipe cap for your stove, first of all, you should pay attention to its reliability. A beautiful, but ill-conceived shape of a product can cause noise and vibration.

Caps for brick kiln

The design of chimneys can be different, but most often pipes are created whose cross-section is rectangular or square. It is worth noting that they are less effective, since turbulence is formed in them, which helps reduce traction. When there is wind, smoke can enter the room. When purchasing a cap for a brick pipe, you can choose one of many options, since there are many such products with different appearances.

It is also worth noting that the rough surface of the brick causes the accumulation of soot and dust. This can cause leaves and other debris to get into the pipe. Because of this, the lumen of the pipe gradually becomes overgrown and the draft is greatly deteriorated. That is why it is necessary to install a cap on the pipe, which will not only protect the pipe, but will also help improve traction.

The deflectors create a vacuum in the upper part of the pipe and therefore the draft is significantly enhanced. Different types You can make deflectors with your own hands.

Deflectors for solid fuel boilers.

Chimneys for coal and wood boilers are usually made of stainless steel or ceramics. Their inner surface is smooth, which enhances traction. Precipitation and condensate in ceramic and stainless steel pipes flow into the condensate collector. If a cap is created with my own hands, it is necessary to make the design according to the instructions, otherwise it will be less effective.

The traction force and its stability are most influenced by the choice of pipe, therefore, before purchasing or creating a deflector, it is necessary to accurately calculate the required length. For coal boilers, pipes up to 8 meters long are usually installed. By installing a deflector, you can shorten the pipe by about 20 percent.

It is worth noting that wood-burning boilers operate in the same way as coal boilers, so they are equipped with a deflector, which is closed with a lid on top. It is worth noting that the exceptions are pyrolysis boilers. The efficiency of such products is up to 92 percent. In the pipes of such boilers, the smoke temperature can reach 180 degrees. This causes the formation large quantity condensate Because of this, ice may appear on the pipe, and soot may accumulate in warm weather. That is why it is recommended to install caps with an open nozzle on this type of boiler. Such structures prevent precipitation from entering the chimney, but do not prevent low-temperature smoke from escaping.

Deflectors for gas and diesel boilers

In these boilers, combustion occurs almost completely, which is why the smoke temperature reaches only 150 degrees. At long-term use In boilers, condensate appearing in the pipe can cause corrosion of the metal, since it has an acidic reaction and is quite aggressive.

Considering the peculiarity of using gas and diesel boilers, it is necessary to install deflectors with an open nozzle on the chimney. Using another type of product is impractical, since gas equipment is equipped with forced draft and additionally created vacuum is not needed. If desired, you can make a cap for the described type of boiler with your own hands.

The working principle of the pipe hood and its functions

Deflectors help protect the chimney from outside air flows, which can contribute to the creation of reverse draft. At the same time, a vacuum is created in the upper part of the pipe, which increases draft and smoke is removed more efficiently.

The deflector performs the following functions:

  1. Protection of the chimney from moisture penetration. As dampness increases in the chimney, favorable conditions are created for the spread of fungus. At the same time, dampness also affects the increase in fuel consumption.
  2. Protection against debris getting into the pipe. The cap protects against various objects getting into the chimney, which reduces the risk of fire and blockages.
  3. Optimization of chimney operation. A properly selected product for a pipe increases efficiency by about 15 percent. With the help of special aerodynamic deflectors, the thrust in the pipe can be significantly increased.

Important! A pipe cap is primarily a functional element, so when choosing or creating such a product, you should not give preference to a model that can create vibration or noise.

Making a cap with your own hands

You can make a chimney canopy with your own hands if you follow certain instructions. But it is worth remembering that in the absence of experience it is better to assemble a simple, but efficient design. To manufacture the described structure, it is necessary to purchase galvanized steel sheets. To work, you will need tools such as metal scissors, a welding machine, a marker and bends.

You can make a cap for a chimney pipe with your own hands quite simply:

  1. At the first stage, measurements are taken from the chimney.
  2. Then a pattern of the future cardboard product is created. During work, you need to take into account that the umbrella should be put on the chimney easily, so a gap of approximately 4 mm is added to the dimensions of the pipe.
  3. After this, the drawing is transferred from cardboard to metal using a marker. Using metal scissors, the umbrella blank is cut out.
  4. At the next stage, the necessary elements are cut out from the metal plate, as well as the material is bent. In places where the edges will connect, it is necessary to make holes, the distance between which should be about 15 cm. After this, the visor is fixed with rivets.
  5. Then the pattern of the drip apron is transferred to metal and cut out. During work, it is important to correctly cut the material to size so that the product effectively performs its functions.
  6. Next from metal plates Brackets are created, which are then welded to the apron and umbrella. After completing such work, it is necessary to treat the welding areas with a metal primer.
  7. On final stage application occurs anti-corrosion coating and paints. After this, you need to wait about 2 days for the coating to dry completely. This completes the creation of a chimney cap with your own hands.

Good afternoon, dear reader! To vent the mixture of gas and fuel combustion products outside, stoves, fireplaces and boilers must be equipped with smoke exhaust ducts. Their head is covered with a special visor or umbrella. At first glance, these products seem to be only decorative elements. But in fact, the cap on the chimney pipe performs a very important function in the chimney system. It can greatly improve energy efficiency heating system in general, and also eliminate any risk of smoke in the home.

The cap is metal structure outwardly similar to an open umbrella, canopy or canopy, which is installed on the head of the chimney duct to protect it from precipitation, debris and birds.

Cap device

The classic cap model is assembled from several parts:

  • - in the shape of a pyramid, cone, mushroom, hemisphere or other, more complex configuration. It performs the function of protecting the pipe from moisture and foreign objects;
  • apron - drip. This part of the cap serves to protect the head of the chimney from drops flying from the umbrella. It helps to increase the service life of the chimney, prevents destruction of brickwork and corrosion metal parts, the appearance of dampness and fungal deposits on the surface of the pipes;
  • brackets - metal plates used to connect the canopy to the apron. Their number is selected depending on the size of the chimney and the weight of the umbrella. The welding method is used to fasten products.

Principle of operation

Installing a cap on the chimney will not only protect against water and debris getting into the chimney pipe, but also allows you to optimize the draft in heating device. This happens as follows:

  • the air flow rests against the wall of the upper cylinder and is forced to go around it from all sides;
  • sliding along the surface of the cylinder, the air stream turns upward, at this time the smoke coming out of the channel is sucked in;
  • the air movement inside the chimney becomes more intense, a zone with reduced pressure is created at the top of the chimney, where smoke from the combustion chamber rushes;
  • if the wind jets are directed vertically or at an angle, they penetrate into the upper cylinder through the gap and suck gaseous combustion products into the pipe.

Advantages and disadvantages

The advantage of installing a cap on the chimney is:

  • more aesthetic appearance of the chimney duct;
  • protection of the internal space of pipes from ingress foreign objects and various garbage;
  • protection of the chimney material from the effects of precipitation;
  • the chimney covers part of the mouth, preventing the wind from overturning the draft.


There are not many disadvantages to installing an umbrella on a chimney, but they are quite significant:

  • the product is installed in the path of combustion products exiting and serves as some obstacle to their free outflow. An incorrectly selected and installed model can reduce draft and lead to smoke in the room;
  • The water vapor generated during fuel combustion exits along with the smoke through the pipe to the street and condenses, coming into contact with the cold metal of the cap, and then freezes when the temperature drops below 0º. As a result, icicles freeze on the chimney, blocking the passage opening of the pipe and preventing the smoke removal process.

Types and designs of caps

Variety of shapes and types smoke exhaust ducts forces manufacturers to develop caps of any size, configuration, appearance. In specialized stores you can buy a chimney of the following shapes:

  • gable;
  • hip;
  • tent;
  • spire-shaped;
  • with a flat lid.

Photo different types chimney caps:


For the manufacture of caps, one of the following materials is used:

  • stainless steel;
  • copper alloy;
  • roofing galvanized sheet;
  • galvanized steel with powder coating;
  • titanium and zinc alloy.

The chimney design may have:

  • an opening lid, which greatly simplifies chimney maintenance;
  • ventilation hole providing free exit for combustion products;
  • spark arrester - designed for solid fuel stoves heating houses with roofing covering from flammable materials.

Often smokehouses are equipped with weather vanes in the form of heraldic symbols or stylized as images of animals, birds, heroes of fairy tales, myths, and decorated with forging and carvings.

Make it yourself or buy it

A standard weather vane that looks like a house with hipped roof, you can make it yourself from galvanized steel. It is easy to cut and bend with simple tools.

If you do not have any skills and tools for the manufacture of such metal structures, then you can buy a ready-made device that is in harmony in style with the overall appearance of the roof.

The approximate price of the simplest cap model starts from 1100 rubles. The cost of TsAGI, Volpert-Grigorovich or Khanzhenkov galvanized deflectors does not exceed 3,500 rubles.

It will cost a lot more rotary model made of stainless steel - from RUB 8,000. Well, the most expensive ones are exclusive forged products.

When choosing a hood design, you should take into account what material the chimney pipe is made of and the type of fuel used to operate the heating device.


This is due different temperatures flue gases and heater efficiency:

  • For brick oven with a chimney of square or rectangular cross-section, also made of brick, a special cap - a deflector - is suitable. Feature chimneys This shape poses a risk of the formation of vortices, which impair traction. In addition, it is deposited on rough surfaces of brickwork. large quantity soot, soot and dust, narrowing the lumen of the pipe, which can greatly impair traction, even to a complete stop. The deflector will protect the chimney walls from excess moisture, thereby reducing the adhesion of combustion products and acting as a draft amplifier. It will create a vacuum in the upper part of the channel and promote the outflow of air from the firebox;
  • solid fuel boilers are usually equipped with ceramic pipes or chimneys made of “sandwich” - pipes with a double wall. They have more smooth surface than brick structures, they are equipped with a condensate collector into which condensate and precipitation flow, so they have much less soot deposits on the inner walls. The stability of the draft of such boilers depends on the height of the chimney. If you don't organize forced draft, then you need to install very tall pipe(up to 8 m). When installing a deflector, the height of the chimney can be reduced by 15-25%, while the stability and draft force will remain at the same level, and installation of the reduced pipe structure will be less complicated. If you have a boiler whose operation is based on the principle of pyrolysis, it is better to install a cap with an open nozzle on the chimney pipe. It will be able to protect the channel from debris and precipitation, but will not become a barrier to the exit of low-temperature smoke;
  • For gas and diesel boilers, it is also recommended to use a hood with an open nozzle. In them, the draft is forced, so there is no need to use a smoke vent - a deflector.

Making and installing a hood with your own hands

When assembling a simple model of a cap at home, you can do without special rolling machines, just simple tools and devices.

Required tools and materials

Set necessary tools for the manufacture and installation of a weather vane, it must consist of:

  • metal ruler;
  • marker;
  • wedge-shaped mallet;
  • metal scissors;
  • electric drill;
  • special clamp;
  • sheet bender;
  • mandrels;
  • small hammer.

Materials you will need:

  • sheet of cardboard;
  • sheet metal;
  • metal plate;
  • screws;
  • primer for metal;
  • dye.

Drawings and diagrams

A simple cap made of galvanized sheet metal 0.6 - 0.8 mm thick for square or rectangular pipe You can easily make one out of brick with your own hands. It has a pyramid-shaped lid and is cut using a pattern from a single sheet of metal.


For chimneys and ventilation shafts of circular cross-section, a TsAGI deflector is used. It is called so because it is an invention of the Central Aerodynamic Institute. It can be made from a sheet of thin stainless steel or galvanized steel.



Size calculation

The chimney must cover all planes at the end of the pipe, and if the design includes a head, then the cap must cover it too horizontal surfaces.


The future product should be quite easy to put on the pipe, so each of its length and width needs to be increased by 4-5 mm.

The wings must be of such a size that they cover the horizontal surfaces of the head.

Work progress

The process of assembling and installing the hood consists of the following steps:

  • Making a pattern from cardboard according to the calculated dimensions.


  • Transferring its contours to a sheet of metal and cutting out the umbrella blank using metal scissors.
  • Placing the workpiece on the workbench with the markings facing up, so that it is more convenient to bend first the lines marked in the drawing with a dotted line up to right angle, and then the lines labeled "d".
  • Rolling a cone. The connection point must be secured with rivets.
  • Making a dropper. The contours of the apron-drip parts are drawn according to the pattern on a sheet of metal and cut out. Bends along the edges of the elements are made using a sheet bender. Rivets are also used to connect parts.


  • Attaching the brackets. They must first be cut from metal plates, and then welded at one end to the apron and umbrella. To treat welding areas, use a metal primer.
  • Cap finishing. All surfaces of the chimney are covered with 2 layers of paint, which will protect the metal from corrosion and give the product a more aesthetic appearance.
  • Installation of the cap on the head of the smoke exhaust pipe. The mounting option for the product is selected depending on the type of pipe. In some cases, screws are used or an additional clamp is installed.

Installation video

The manufacturing technology is clearly visible round umbrella presented on video.