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When installing gas or stove heating in a house, it is important to take care of the chimney insulation. This will allow you to achieve effective heat savings and protect the structure from temperature changes. Consider how to properly insulate a chimney.

Why do I need to insulate a chimney?

Chimney insulation can avoid many problems with the heating system. First of all, it prevents the formation of condensate on the walls of the boiler, which accumulates and begins to destroy the pipe.

In addition, the insulation of the chimney of a solid fuel boiler reduces the need for frequent cleaning, due to the fact that soot burns well and does not accumulate on the walls of the structure. The chimney warms up better, and the draft in it improves.

Pros and cons of chimney insulation

Do-it-yourself chimney insulation has several advantages:

Condensate does not accumulate on the walls of the equipment. This avoids their destruction.
1. After fuel combustion, harmful vapors can evaporate faster.
2. The strength of the boiler is significantly increased.
3. Temperature drops are reduced. This is especially true for the part of the pipe that is located outside the building.
4. Heat loss is reduced. This makes it possible to save on fuel.
5. Insulation becomes a kind of frame, strengthens the pipe placed on the street.

There are practically no disadvantages to insulation. And those that can be identified are conditional:

Insulation requires financial costs. As a result, the budget for the creation of a heating system will have to be increased.
1. A thick layer of insulation makes the structure more massive and heavy. This provokes an additional load on the foundation and roof. To avoid their damage, the issue of creating insulation must be thought out in advance.

How to insulate a chimney?

The method and material for chimney insulation will depend on what material the chimney is made of. Let's take a closer look at each of them.

How to insulate a brick chimney?

There are several ways to do this:

plaster the surface of the pipe;
• use mineral wool.

The easiest way is to apply plaster mortar. It is applied in several layers to the reinforcing mesh, which is attached directly to the pipe. When the mortar is completely dry, it is grouted, cracks are filled, and, if necessary, paint is applied. This method allows to reduce heat loss by 25%.

More expensive is the insulation of the chimney with mineral wool. The insulation process is as follows:

The outer side of the brick wall is cleaned.
1. The crate is being installed using a metal profile.
2. The guide profile is fixed at the top and bottom. Racks and guides are attached to it.
3. Mineral wool is placed between the resulting grids so that there are no gaps between its individual parts.
4. The insulation is covered with a layer of vapor barrier. The joints are glued with tape.
5. A plaster mesh is applied to the vapor barrier.
6. Top is plastered with cement mixture.
7. At the final stage, the insulation is lined with siding or dry plaster.

How to insulate a chimney from an asbestos pipe?

Works on the insulation of a chimney made of this material are carried out in places where the pipe is in contact with cold air (uninsulated attic, street). It is also worth insulating the ventilation ducts.

The material used for insulation must meet certain requirements. It should not melt or burn. Mineral wool is an ideal option in this case. The process of insulation with this material is similar to its use on a brick chimney pipe.

Insulation of a stainless steel chimney

The material for insulating a stainless steel pipe can be mineral wool, plaster solution, glass wool, cinder concrete pipes or foil for chimney insulation.

The easiest way to insulate a metal chimney is to use a «shell» from a larger diameter pipe. It is created as follows:

Holes are created in the roofing, 20-30 cm larger than the diameter of the chimney.
1. When performing the winding, a small overlap is made. For this purpose, mineral wool with a thickness of 6 cm or more is used.
2. Wire is used to fix the cotton wool.
3. A casing made of a larger diameter pipe is put on top. If necessary, it is fixed with an adhesive tape or screed.

Having insulated the chimney, you can be sure that its service life will be much longer than that of an uninsulated structure. It will also improve traction, reduce the process of condensation and soot deposition.