Brick pipe insulation. How to isolate a metal chimney pipe - we make a box and other methods

The construction of a chimney channel in a private house involves compliance with the rules of sealing and fire safety. When constructing a chimney in a house or at the outlet of a metal chimney in a bath through the roof, chimney insulation is the main indicator of the correct organization of this block of work.

The junction of the chimney with the ceiling and roofing materials remains a vulnerable area due to possible overheating and fire of the roof. To eliminate the possibility of a fire, it is important to organize the insulation and sealing of the roof in accordance with all the rules.

Pipe insulation at the joint

The release of new building materials and the development of advanced technologies are a guarantee of effective thermal insulation. The choice of materials for this purpose largely determines the shape of the chimney, the method of wrapping the pipe that removes hot gaseous substances during fuel combustion.

The main difficulty is to prevent the materials adjacent to the chimney from heating up excessively so that they do not ignite in any type of building.

Most buildings in private households have a chimney coming from:

solid fuel boiler;
fireplace;
furnaces;
plates for cooking.

They have different degrees of load and the level of heating to the maximum temperature, but insulation is needed in each case. A prefabricated or modular chimney, produced as a sandwich system, involves ready-made insulation of double pipes with a layer of basalt wool. It is effective both for insulation, to reduce the likelihood of condensation, and as protection against overheating of roofing materials at the exit through the roof. It remains to properly organize the tightness of this passage so that moisture does not enter the house.

Ceramic chimney kit

Before insulating a pipe in a bathhouse or residential building, you should choose the option that is most suitable for your design. A ceramic chimney is no less efficient and durable; it is used for a fireplace or a bath. The assembly of the finished structure includes components made of fire-fighting materials. Some of them adjoin directly to the pipe or cover it, others are designed to seal the passage through the roof.

The choice of location for the chimney outlet should be such as to facilitate the insulation work. But the pipe should rise 30-40 cm above the ridge, in order to avoid reverse thrust in strong winds, so the pipe is often led out through the ridge.

How to choose the right chimney outlet

Example of an external chimney outlet

In the houses of the old design, when all the stove chimneys were made of brickwork, round pipes are led out through a square ceiling opening. The passage section in the ceiling is equipped with a special box made of wood or metal, keeping a sufficient distance to the chimney.

It is important to properly insulate this "window" so that all gaps are filled, and the materials at the junction are protected from fire. This gap is filled with mineral wool, and special fire-resistant plaster is used. Basalt and asbestos blocks are also used in a brick chimney.

The safe and secure exit of the chimney pipe through the roof opening is solved in 2 directions:

fire protection of the roof truss frame at the pipe passage;
waterproofing the hole from the penetration of precipitation with those materials that will help insulate the pipe and are most suitable for the type of roofing material and its color.

Conclusion of the pipe through the roofing pie in accordance with all fire safety standards

Separation of the chimney and multi-layer roofing cake (with insulation, hydro and vapor barrier) is carried out according to all modern standards:

for double metal pipes, internal insulation with mineral wool is provided;
a single pipe is covered with a finished insulating shell of the required diameter and protected from the outside;
in brickwork, it is important to increase the wall thickness of the order (38-40 cm) and protect the contact surfaces with special plaster.

The box for the outlet of the chimney is constructed from a transverse beam and rafters, keeping a distance of at least 15 cm from the wooden structure to the metal chimney. The gap between them is filled with basalt wool.

The fire regulations state that the temperature in the contact circle of the chimney should not exceed 50ºС. The film membranes inside the roofing cake can be made of flammable materials, so a gap and additional insulation with non-combustible mineral wool is required between them and the pipe.

The membranes of the roofing pie, cut at the exit of the pipe, must be carefully cut and wrapped. Then they are pressed with a crate and fixed along the edges of the box with nails. For complete tightness of the roof, the pipe in this place must be wrapped with a special one.

When the chimney goes through an unheated attic, and not in a residential attic, the risk of overheating of the roof elements is reduced. Complete tightness of the insulation is necessary in any case, but it is better to additionally wrap the pipe with a special tape. Proper installation of the internal waterproofing and the outer hood will ensure reliable sealing after the thermal insulation of the chimney is installed in the roof opening.

Pipe exit through the roof

Chimney insulation options

In most cases, well-organized chimney insulation on the roof counteracts the leakage of precipitation. But there are 2 types of possible leaks:

from above, when the insulating cap is incorrectly installed above the roofing materials;
from below when the waterproofing agents are incorrectly laid under the deck.

The simplest way to externally insulate a chimney is to install a ready-made insulating apron or cap.

Try to cut a similar device from a galvanized sheet yourself to fix a leak in an old roof, this will save money. With this method, no adjustment is needed - all the design features of the roof and the pipe coming out of it are taken into account.

Products of this type are also produced from different materials. It is important to choose an insulating cap (apron) that fits the width of the metal chimney pipe. Or a complete roof passage is selected, which is purchased along with a sandwich pipe.

Any building and roof gradually shrink, so rigid fastening of waterproofing is not always effective. Visually, the integrity of the roof is preserved, and signs of depressurization gradually appear at the joints. Experts recommend reinforcing the insulation at the places where the cap is attached - with an elastic heat-resistant gasket.

Among the most reliable structures for the passage of a pipe through the roof is a specially made box - like a truss system. Instead of wood, which belongs to flammable materials, it can be made of galvanized roofing, but in the same way.

The design of modular chimneys has ready-made thermal insulation, but they differ in configuration. For example, there is a double pipe with a layer of basalt wool or a special ceramic core and an outer casing made of concrete. The assembly of modular blocks is quite simple - the diagram is attached with the purchase.

It is possible to install a gasket made of asbestos, followed by sealing with asbestos mortar. Each new block of the module is attached above the previous one with the same composition of the mixture. After installation is completed, the pipe is isolated from leakage in the roof window in any way described.

Modern roofing with corrugated board has its own characteristics - here it is better to make the chimney window a little wider. All mating surfaces are also filled with materials with thermal insulating properties. The chimney, before being wrapped with basalt wool, is placed in a steel box. Carefully cut the film layers of vapor and waterproofing, fix them by the edges of the box. Between it and the pipe, it is imperative to make a heat-resistant filling.

Roof penetration

Next, external waterproofing is carried out - a sealing cap material corresponding to the size of the chimney pipe is put on top, the edge is fastened with a clamp on glue. The lower edge is tightly fitted to the roofing material, rigidly fixed with a sealant. A steel cap is often included in the package of such a chimney. They are put on round pipes. The installation is recommended when the smoke from the solid fuel boiler at the outlet has a temperature of more than 100°C.

If you properly insulate the chimney pipe, then you will not be threatened with dampness and rotten ceiling.

To carry out work on the thermal insulation of chimney pipes, you will need to select the most suitable materials and properly insulate them. What is the best way to do this? Beginning stove masters will find the answer to this question in our article.

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Why is chimney insulation needed?

First, we will try to answer the main question - why do we need non-combustible thermal insulation for chimneys?

Ways to insulate furnace channels

The choice of materials and technology for performing work on the thermal insulation of the chimney with your own hands depends on several factors. Let us analyze the main ones in more detail, indicating the positive and negative qualities of heat insulators.

Basalt wool insulation

One of the most common thermal insulation materials - this is due to its advantages:

low thermal conductivity. According to this characteristic, the material is equated to polystyrene, rubber and cork;
high level of waterproofing of basalt fiber. Water easily wets the outer layer of the material, but cannot get inside. It is possible to work in conditions of premises with constant air humidity, while maintaining the main characteristics;
high rates of fire resistance. Cotton wool withstands heating over 10,000, without loss of quality of the thermal insulation layer;
inside the material, the fibers are arranged longitudinally and vertically, this feature allows you to withstand high compressive loads. The maximum allowable layer deformation is 10%.

Among the manufacturers, according to customer reviews, several companies are leading:

"Rockwool" - thermal insulation from Danish manufacturers. It is ahead of its competitors in a number of characteristics, which allows it to provide high-quality work of the layer with minimum thickness dimensions. It is recommended to use for insulation of ceramic chimneys and fireplaces;
URSA is an Italian brand that has been operating in Russia for a long time. Products are produced for the whole range of works in industry and private housing construction;
"Izovat" - plates of this company are produced with different levels of strength. They are produced with a thickness of 30-200 mm and can be installed on a small chimney for a sauna stove or for industrial boiler installations;
"Paroc" - Swedish stoves have been produced since the middle of the last century. Launched throughout the European continent. The characteristics of the material allow the use of wool to protect steel pipelines. The product series "Paroc Pro Section" and "Paroc Pro Bend" with an outer layer have high performance in thermal insulation and protection of steel pipelines and surfaces.

Application of kaolin

Such material is produced using advanced scientific developments. Inorganic binder additives are added to the mullite-silica base in vacuum and subsequent drying of the material. To increase the strength, a clay binder is added to them.

Kaolin fibers have a number of advantages:

safe for human health. Do not contain asbestos and do not emit harmful substances when heated;
high level of safety from fires;
thermal energy losses are reduced;
the material is guaranteed not to be destroyed even at the 2001 start or stop of the furnace. Can be used in a country house with occasional use of the stove;
plates are easily processed and mounted;
low density with high thermal insulation performance affects the size of the plates and allows you to reduce the thickness while maintaining performance.

Warming with mineral wool

Such thermal insulation has several advantages:

properties allow you to maintain the optimum flow temperature in different periods of the year. The temperature of the heated gases leaving the furnace and inside the room itself can vary significantly. This property is achieved by the composition and characteristics of the material. It can be used for thermal insulation of walls and pipelines.
the substance is absolutely non-flammable. Able not to ignite even at a temperature of 1000 0 and above. Such a layer does not allow the fire to develop and protects from open flames. Some binders begin to evaporate at lower temperatures;
at high heating temperatures, the thermal insulation layer retains its shape and is able to withstand small mechanical forces. This feature is achieved by making certain additives;
high levels of sound insulation. Such material prevents the passage of sounds through the surfaces of the protected walls. Between the fibers, air layers are formed that do not allow sounds to pass;
the top layer of wool can get wet, but water does not pass to the pipeline and does not freeze at low temperatures. This feature does not allow colonies of fungi and mold to develop;
environmentally friendly materials are used for production. There is no harmful effect on the atmosphere and human health.

The disadvantages of this material include several characteristics:

material is not the cheapest. If you are offered expensive material at a bargain price, it means that they are trying to sell you a marriage or a fake from low-quality materials and produced in artisanal conditions;
large emission of dust during the production of works. It is recommended to work in protective suits and respiratory protection.

Among the manufacturers, there are products of several companies:

"ROCKWOOL" - stone wool of this company is in demand among domestic and foreign consumers. Among its advantages, several characteristics are distinguished - a high level of strength and a long service life (at least 15 years). To this we add the application of an additional protective waterproofing layer and increased characteristics for soundproofing housing;
mineral material from the company "TechnoNIKOL". For its manufacture, basalt rocks are used. It has an increased level of heat and sound insulation of residential premises. Light weight and ease of cutting allows you to reduce the time of work and do such a chimney protection with your own hands;
the well-known insulation from the URSA company is probably known to every consumer. The material is rolled into rolls - this facilitates its transportation and reduces the amount of waste during installation. The material does not contain formaldehyde. Recommended for use in residential, children's and school buildings and hospitals.

What material to choose?

There is no definite answer to this question. It all depends on the amount of investment that you can allocate for the purchase of materials and components. The price of thermal insulation materials can vary significantly, depending on the region. But the average price cannot be ignored when buying. This quality will avoid buying a fake. If it is very difficult to choose - take mineral wool.

Conclusion

The work is not complicated, but the safety of your home from fires, damage to the finishing layer of a wall or ceiling depends on their careful implementation.

Responsibly select materials, do not save when purchasing them. Only by observing all these simple rules and do-it-yourself technology, you can not only save a lot, but also make the atmosphere of your home comfortable and cozy.

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If you decide to build a bath, then do not forget about the high-quality insulation of the stove, chimney, walls and ceiling. Otherwise, you may have serious problems with the ignition of the ceiling of the building. Therefore, we will try to dwell in more detail on the topical problem today - do-it-yourself pipe insulation in the bath.

Protective materials for wooden structures

Due to the fact that the chimney and the furnace heat up quickly, a fire can occur. Moreover, according to tradition, wood is the material for the bath. Back in the old days, it was customary to insulate walls, a ceiling, a stove, a chimney with an asbestos layer, clay and other available materials that conduct heat energy rather poorly and are resistant to elevated temperatures.

So how to overlay the pipe from the stove today? Insulation of the chimney structure is necessary both for the purpose of fire safety and protection against condensate, so that cooling is slower and the smoke exhaust system lasts longer.

It is a mistake to think that a few metal sheets will be enough to isolate from fire, with which the ceiling around the chimney is upholstered. After all, the metal also heats up quickly, so it will not protect against fire, and as a heat insulator it will also not work.

Red brick is not always needed for pipe lining, although it is endowed with excellent thermal insulation properties. The reason is that such a design is not suitable for every bath in design.

To better understand how to wrap a chimney pipe from fire, consider two options for insulating materials in the form:

thermal insulation;
folgoizola.

Furnace pipe insulation: thermal insulation

This is a unique material, the structure of which includes foamed polyethylene, located between a pair of foil sheets. With the help of thermal insulation, you can qualitatively insulate the chimney, and on your own.

The thickness of the thermal insulation varies from 2 to 10 mm, and the thicker the material, the greater its resistance to high temperatures.

The top layer of the foil serves as a reliable protection of the pipe from significant overheating. With the help of a wire or adhesive tape of a metal craftsman, a thermal insulation is attached, which is then wrapped around the chimney.

You can wrap the chimney with foil insulation

Modern material includes two layers: heat insulator and foil. The second - plays a reflective function and can save up to 90% of the thermal energy in the building. Folgoizol is a harmless material compared to other analogues, since compacted food acts as a foil. The material is resistant to ultraviolet and elevated temperatures within the range of -65 to +175 degrees Celsius, a good insulator.

Who still does not know how to insulate the chimney pipe in the sauna, we recommend covering the steam room ceiling, walls and chimney with foil insulation. As a result, you will get a room that is similar in design to a thermos. In the sauna, heat will remain, and the bath will quickly gain temperature, and then slowly cool down. Sometimes a mesh is installed on the pipe for stones in the bath, which is very convenient and practical.

Help - sandwich pipes

For those who wish to equip a safe chimney in the bath, we suggest using a sandwich pipe. This design includes several sections that are easily placed into each other, i.e. looks like a layered cake.

Here are the main components of a sandwich pipe:

stainless steel layer (inside);
insulation in the form of basalt / mineral wool (in the middle);
steel with zinc coating (outside).

This creative design represents the insulation of a chimney built into a common system and is designed to solve two problems at the same time:

protection against soot accumulation inside;
maintaining the optimum outside temperature.

It is easy to assemble a sandwich pipe on your own and use it for a sauna with an iron stove or a bath. What to do if you built a Russian steam room with a brick stove? Below we will consider how to overlay the pipe in this situation in order to protect it from ignition.

Pipe insulation in a traditional Russian bath

At elevated temperatures, refractory red brick retains its operational properties, therefore it is in demand when building a chimney in a bath with a stone stove. In this case, you are guaranteed protection of the pipe from fire and long-term preservation of heat.

The service life of the structure depends on how competently the brick pipe is folded. Do not save on materials during the construction of the chimney, because. then the repair will cost you much more.

Let's take a closer look at how to isolate the pipe in the bath from the ceiling:

With the help of asbestos, overlay the outlet of the pipe on the ceiling and through the roof.
Using galvanized material, insulate the walls from the inside of the pipe. Standard iron sheets are completely unsuitable for this purpose due to their tendency to corrode.
Run a box around the pipe at the points of its passage through the ceiling.
Pour expanded clay inside the box to retain heat and protect wooden floors from ignition.

You professionally wrapped the pipe, but the work on arranging the chimney did not end there. The next step is to insulate the furnace, ceiling and walls of the bath.

Protecting the oven from fire

Modern metal stoves are mounted on a foundation, while sheathing with sheets of the same material at the back and side of the wall. If you yourself beat the furnace only with metal, then its appearance will not be very aesthetic. It is better to make the outer masonry with red brick, which isolates the stove from fire and retains heat in the bath.

Due to the fact that asbestos releases toxic substances at elevated temperatures, it is not recommended to use it in a steam room. Natural felt is considered harmless, which, moreover, is a good insulator. At a price, this material is more expensive than asbestos sheets, and when smoldering, it emits a specific smell (felt does not light up), which can be immediately felt.

If you intend to install the stove on a wooden floor, then first it is better to lay a felt material in a couple of layers, then lay out a brick in three rows. For walls and floors, it is advised to lay sheets of metal as an insulator, the height of which varies from 50 to 70 cm.

Almost every private house has a stove or fireplace, which are necessarily equipped with a chimney to remove combustion products. The temperature of this element can reach several hundred degrees, and the only thing that separates it from the room is the wall of the chimney.

During construction, the most important aspect of the work is compliance with the rules of fire safety at home. The most vulnerable areas from the point of view of ignition and overheating are considered. Therefore, special insulation techniques depending on the type of chimney, floor and roof material.

Fire insulation

Chimney insulation carried out in order to resist the heating of materials adjacent to it. Passing part of the chimney through the ceiling or roof, the distance to it must be more than 10 cm. This free space is filled with refractory material with low thermal conductivity ( basalt wool or fabric, asbestos fiber).

The box is made from steel or wood. in places of overlapping and junction with the roof they have fluff (over 40 cm) with a large number of layers of bricks, but even with this it is necessary to additionally isolate the adjacent parts. For this use asbestos or basalt slabs, which are attached to the walls of the chimney.

If the chimney has a prefabricated structure (steel, ceramic), then the kit must necessarily contain special elements that already have increased fire performance. Such modules are attached to the pipe, may have an additional reinforcing frame and a waterproofing apron for the roof. Sometimes round pipes insulated with brickwork, for this, a window is cut in the ceiling, lined with bricks in one or more layers, the distance to the pipe is clogged mineral wool.

Roof chimney waterproofing

Chimney insulation from moisture infiltration into the room- a very important stage of construction work. The roof of the house can be made of different materials, but the chimney in any of them is a vulnerable point for moisture penetration. For this reason, it is necessary to properly waterproofing measures, in addition to thermal insulation work.

Read also: How to deal with condensate in the chimney

Increasingly, corrugated board is used as a roof in houses, as it is a reliable material that is easy to install and does not require repair for a long time.

Elastic apron

It is best if the chimney is insulated before the roof is covered with corrugated board. Chimney opening in the roof make a few centimeters wider, the joint is filled with heat-insulating and preferably hygroscopic material. Next, the chimney is placed in a steel box. Heat-resistant material is laid between the pipe and the box and the first layer of waterproofing is made of a film sheet and it is tightly fixed.

When the corrugated board is already in place, external waterproofing work is carried out. For this use finished sealed elements, Or everything is done manually. The sealed material is adjusted to the size of the pipe and put on from above, its upper edge rises to the walls of the chimney and fastened with a clamp and adhesives, and the lower one is pressed against the roof with the help of hard sealant.

metal apron

Brick pipes passing through the roof have expanded masonry ( fluff) and ledges ( overlap), which perform the functions of a heat and moisture insulator. The insulation of a brick chimney from moisture is carried out using a steel, lead apron, which is worn on roof section. Previously, a layer of roofing material with an edge raised to the wall is laid on the space in front of the pipe. Creeps

Having your own country house, you need to take care of warming up the rooms in the cold season. A stove or other heating system needs a chimney to be installed. The smoke exhaust pipe is the main element of the heat supply communications. For its effective functioning, it is necessary to insulate the chimney from the outside.

The relevance of thermal insulation

Moisture and smoke generated during the combustion of fuel are aggressive factors affecting the brick chimney. The temperature difference in the cold season and the accumulated moisture settling on the walls fills the microcracks with water, and the stone structure collapses from the inside. Small ice crystals press from the inside and destroy it. An insulated chimney allows this to be excluded.
During combustion, condensate is formed on the surface of the flue, which includes a chemical series of oxides. Interacting, the elements form weak acids (carbonic, sulfuric, etc.) that can destroy the metal surface. It is for this reason that chimney insulation is necessary.
Proper installation of thermal insulation helps prevent fires inside the premises and will not allow the roof to ignite. Well-heated chimney pipes improve draft in the fireplace, boiler and stove, there is less tar and burning deposits in it. The efficiency of the heating unit is significantly increased.

Positive factors of an insulated chimney

Before answering the question - how to insulate the pipe, it is necessary to highlight the advantages of an insulated chimney.
An insulated gas outlet provides protection for the heating system from the effects of the external environment and combustion products. Of course, thermal insulation cannot completely protect the structure from destruction, but it will extend its service life. This happens due to the following factors:

Pipe insulation allows maintaining thermal balance in the middle of the structure, eliminating the possibility of aggressive acids and condensate falling onto the walls. The products of combustion are completely volatilized together with the smoke stream.
Chimney insulation minimizes the possibility of a temperature difference between the cooled flue and hot steam.
Increased energy-saving properties that contribute to fuel economy.
The strength of the steam outlet structure increases due to the reinforcing frame.

Properly selected chimney insulation increases the frost-resistant properties of the system, ensures long-term preservation of the appearance and increases the service life, which is very important.

The choice of material for thermal insulation

The main question of the owners of country houses with an autonomous heating system is how to insulate the chimney. In order to reliably insulate the outlets for the furnace or boiler, materials with a high degree of thermal insulation are used to ensure the thermal balance of the chimney on the roof.

Basalt insulation

Relevant for the insulation of the chimney mineral wool or basalt. Insulation is obtained from a melt of volcanic rock - gabbo-basalt. It is converted into fibers, due to which the insulating material has the advantages of:

retains up to 95% of heat;
characterized by good permeability of the outgoing steam;
different chemical and corrosion resistance;
prevents the growth of fungus and mold on the surface of the chimney on the roof;
vibration and heat resistant;
made of ecological materials;
not subject to destruction under the influence of ultraviolet radiation.

Stainless steel casing

Metal "armor" in the form of a pipe made of stainless steel is used as an option for insulation. It is able to provide full protection against mechanical damage, moisture and other aggressive factors.
The casing for the chimney is mounted on a pipe on the roof. The annular space is filled with basalt wool, covered with insulation from the outside, 5 cm thick. An asbestos chimney can be wrapped with this insulation.

Wooden shields

Wooden shields are considered one of the simplest options for insulating a chimney pipe. Thermal insulation is made in the form of a wooden frame from plates of the appropriate size. On top of it, slate or other flooring is fixed, from which the roof of the dwelling is made.
After the pipe is completely covered with wood, the empty cavity is filled with felt, slag, sand, mineral wool. Frame seams are necessarily covered with a waterproofing compound.

Slag-reinforced concrete insulation slabs

Insulation of the chimney in a private house using iron and cinder concrete slabs provides the smallest distance between the joints on the structure. The space inside and the corners are reinforced with mesh or wire, gypsum, clay and sand are poured in the form of a solution. Plaster is applied over the tiled insulation.

The specifics of insulation work

When insulating the chimney with your own hands, we take into account that during the operation of the heating boiler, the temperature in the smoke exhaust duct can reach 200 -300 degrees.

As insulation, it is better to choose a material with high heat-resistant properties: glass wool, mineral wool, basalt.

In the building materials market, thermal insulation is sold in the form of finished cylinders with a special foil screen. With their help, they make out the gas duct and adjacent roof elements - protecting them from fire and cold air. Tubular structures are sold in different diameters, which allows you to wrap different-sized smoke outlets.

Regulatory requirements for the installation of thermal insulation

Before insulating the chimney pipe, you must make sure that it is installed correctly.

The flue is carried out in accordance with the technological standards specified in GOST 52953-2008

The combustion products outlet pipe must be 5 m high. This indicator ensures optimal draft in the heating system.
A distance of at least 250 mm is required between the roof slab and the outer element of the boiler room.
If the building is covered with combustible materials, in particular, slate, roofing material, ondulin, then the insulated smoke exhaust structure must be equipped with a spark arrester.

After making sure that the system is installed correctly, you can proceed to subsequent work on winding with thermal insulation.

The main methods of insulation

The metal chimney pipe is insulated using various methods.

Steel chimney insulation technique

The chimney is insulated using a special solution. The composition is prepared from a dry mixture and water. The solution is applied with a spatula to the surface, spreading over the entire area. Then a fiberglass reinforcing frame is fixed on it, on which plaster is applied.

Gas boiler chimney insulation

Insulation for pipes of a gas boiler must have a number of increased heat-insulating and heat-resistant qualities.

Sandwich structures block condensate from settling on the surface, saving energy at the same time.

Sandwich chimney consists of a layer of mineral wool and two metal pipes. The upper element, with a large diameter, is the main sleeve, the smaller one is part of the steam outlet channel.
How to isolate such a chimney pipe with your own hands? You must follow the recommendations:

In the roof of the roof and ceilings, holes are made with a diameter of 25 cm larger than the chimney channel.
At this stage, it is necessary to insulate the chimney pipe with a layer of basalt wool. The thickness of the winding must be at least 5 cm.
The insulation around the pipe is fixed with steel wire.
A larger casing is put on top.

Upon completion of the work, the chimney is connected to a heating source and the surrounding riser is filled with expanded clay, clay or asbestos.

Sauna chimneys

Insulation of the chimney in the bath is aimed at improving the heat transfer of the heating source, which is a stone stove.

You can isolate the chimney in the steam room using the following options:

thermal insulation - a material made of foamed polyethylene, hidden between sheets of foil. Insulation rolls with a thickness of 2 - 10 mm are offered on the market. The foil surface reduces overheating of the pipe. The insulation is wrapped around the chimney, fixed with wire or metallized tape;
Filgoizol consists of two balls: a foil that saves more than 90% of the heat in the room and a heat insulator. The material is used to cover the walls and ceilings of the sauna, providing the effect of a thermos;
sandwich pipe, consisting of several sections. This option is suitable for saunas and baths with an iron stove.

To insulate a metal pipe means to ensure the optimal functioning of the heating system. Proper installation of chimney insulation with your own hands allows you to increase the operational life of the structure and the heat generator, and also prevents fire.

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