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Chimney cap: how to do it yourself or choose a ready-made

The chimney is one of the key integral parts stoves and fireplaces... An equally important element is the cap for the chimney pipe, which performs not only an aesthetic function, but also a protective one. It ensures an unobstructed and stable removal of combustion products.

The cap gives the structure a complete look

The content of the article

1 Why do you need a cap on a chimney pipe
2 Purpose and application of deflectors
3 Do-it-yourself chimney deflector drawings and photos
4 Chimneys for brick pipes and forged hoods for chimneys: features and prices
5 Expert recommendations
6 Outcome
7 Video: do-it-yourself weather vane, cap and chimney on the chimney on the roof

Why do you need a cap on a chimney pipe

First of all, the chimney is installed in order to increase the draft by diverging air flows. There are several functions of the device:

Protects the device from water and snow penetration. With heavy downpours, a huge amount of precipitation can accumulate in the structure, which, in contact with flue gases, form acidic compounds. The cap on the chimney, in turn, protects the pipe mouth from the ingress of unwanted moisture;
Prevents unwanted objects from entering the structure;
Improves traction. For this purpose, deflectors of various variations have been thought out.

Note! State-of-the-art devices are equipped with individual grooves that serve to drain the condensate formed on the steel surface in contact with heated air.

Chimney cap - materials of manufacture

For trouble-free functionality of the device, it is necessary to take a responsible approach to the selection of material for direct production. Copper is one of the most popular materials because it is durable and aesthetically pleasing. If the cap for the chimney pipe is made of any other building material, then all mounting elements must be brass.

Helpful information! For the manufacture of such devices, it is better not to combine materials.Since copper, in contact with other materials, oxidizes. Consequently, the service life of the chimney is significantly reduced.

The weather vane looks impressive on the chimney, made of stainless steel or galvanized. The most popular is a stainless steel device with polymer sheathing. The service life of such a device reaches 20 years. The polymer coating makes it possible to match the hood to match the roof.

Beautiful forged weather vane will become a real roof decoration

A variety of chimney caps

The type of weather vane is based on the structure of the pipe and the external shape.

Varieties of chimneys:

Generally accepted. This type of weather vane looks like a hut at the top of the pipe. This kind of structure can have a variety of configurations;
European chimney fittings. A key feature of the structure is the rounded cap. The main task of the product is to prevent the formation of condensate and ventilate the room;
Multi-slope dome device. The advantage of the design is that there are two slopes. This kind of product contributes to the maximum saving of the pipe from precipitation;

Chimney with multi-slope hood

Cover with weather vane. The structure is equipped with various figures on top;

Vane for a brick chimney

With opening lid. This structure allows you to quickly perform all the necessary manipulations regarding pipe maintenance. Dimensional ventilation is key;
With deflector. This design can be additionally equipped with an opening cover. Provides a direct effect on traction power.

Related article:

Chimneys for a gas boiler in a private house. Selection rules and requirements for the installation of chimneys, their varieties and installation nuances in a special publication.

How to choose and buy a chimney cap, given its structure?

When choosing a product, it is necessary to take into account the direct structure of the chimney. The ideal option is a three-layer device of modular sandwich panels... With such a device, you don't have to worry about protecting the chimney from precipitation. Since, all the moisture that gets inside the structure is collected in the collector.

When it comes to gas devices, in this case, the nozzle is preferable. The best option for a solid fuel system is a vane deflector.

There are no contraindications for brick pipes in conjunction with a solid fuel system and you can give preference to any cap you like.

Note! When using gas systems, the installation of umbrellas is strictly prohibited.

Chimney system installation diagram

Making a visor with your own hand

To correctly make a cap on a chimney with your own hands, you should use drawings of simpler samples.

To work, you need the following devices and materials:

Galvanized steel, copper or stainless steel;
Scissors for metal;
Pliers, mallet, vise.

Galvanized steel swivel hoods

Helpful information! Use a ruler and metal angle for measurements.

Work execution algorithm:

The manufacture of the visor must begin with measurements of the chimney.
Formation of the scheme on paper. It should be borne in mind that the device must be put on the pipe freely. Therefore, a gap of about 2-3 mm is added to the existing dimensions of the pipe.

Chimney hood scheme

The finished drawing must be transferred to the building material and cut;
The sides of the workpiece are bent along the dotted line "a" to an angle of 90 degrees. Then a similar procedure must be performed with the straight lines marked with the letter "d". At the points of attachment, it is necessary to make 3 through holes (step 15-20 cm) and fasten the structure with rivets;

Drawing of a dropper apron with markings

The apron-drip pattern should be moved to the material and cut out. All sides of the product are bent and fastened together with rivets.

Apron design options

It is necessary to make supports of the appropriate length from the plate by welding them to the apron and the cap. The formed seams must be treated with a metal primer.

Useful advice! An anti-corrosion agent should be applied to the manufactured cap and painted in several layers.

Purpose and application of deflectors

The deflector is a structure that is designed to improve traction while creating a vacuum in the chimney.

Deflector with apron

There are a number of generally established forms:

TsAGI type;
Rounded type;
Grigorovich's device;
Opened and H-shaped.

Do-it-yourself Volpert-Grigorovich deflector

The structure contains several separate parts:

Bottom type cylinder;
Diffuser;
Umbrella.

Diffuser has a cylindrical shape, located in the upper part of the building, and the umbrella implements protective functions. Products of this kind are made of galvanized steel, which eliminates the corrosion procedure, preventing the pipe from clogging with debris.

Do-it-yourself chimney deflector drawings and photos

To make a deflector, first of all, it is necessary to develop drawings of the future device, which are integral elements of the work.

Variety of chimney hood configurations

To make correct calculations regarding the design parameter, it is necessary to know the inner diameter of the chimney.

Table for the correct calculation of the chimney deflector.

Chimney inner diameter d, mm	Deflector height H, mm	Diffuser width D, mm
120	144	240
140	168	280
200	240	400
400	480	800
500	600	1 000

Algorithm for making manipulations:

All elements of the drawing are transferred to paper;
The paper elements of the building are pre-connected as they should be in the final form;
From paper, all elements are transferred to the building material and cut out;
To manufacture the diffuser, the metal is rolled into a cylindrical structure. The edges of the structure are held together;
The outer cylinder is manufactured in the same way;
Strips (3-4 pcs.) Are made of metal material, about 20 cm long and 6 cm thick. The elements are attached to the cap;
The umbrella is attached to the diffuser and integrated into the outer cylinder.

Useful advice! In places where the structure is bent, the metal should be bent and tapped to make it thinner.

Cap for rectangular pipe

Chimneys for brick pipes and forged hoods for chimneys: features and prices

On the open spaces of the Runet, there are many tips and videos on how to make a visor for a chimney with your own hands. However, not everyone has a desire to manufacture their own design, and many prefer to purchase a finished device.

It is possible to purchase chimneys for brick pipes within the range of 700 - 7,000 rubles, depending on the complexity of the structure. To buy a cap of the simplest design, you will have to spend about 400 rubles.

Expert recommendations

It is not recommended to install a deflector on the chimney of gas equipment. Since the low temperature of gases in winter can lead to the fact that the horizontal part of the outlet on the chimney will freeze, and the deflector contributes to strengthening this kind of tendency.

Experts do not recommend weather vanes, as their rotating elements fail quite quickly. In winter, due to the formation of condensation, they are covered with ice, which leads to loosening of the pipe masonry. Therefore, visors are the best option for chimneys.

Example of a "smart" deflector with a swivel hood

Which design to choose a visor depends on the section of the pipe. For example, for a round type chimney, most often the visor is identical in shape, and for a rectangular structure it can have a large number of types.

Outcome

High-quality draft formation is the key to the trouble-free operation of the heating system. Therefore, you need to think about the correct installation of the hood on the chimney. This type of device will help ensure the correct functioning of the entire system and eliminate weak draft in the pipe.