Chimney installation sandwich do it yourself

The name of the sandwich chimneys is due to the features of the device of their pipe, which is a combination of the internal and external channels with a layer of thermal insulation laid between them. All those who would like to learn how to connect a sandwich pipe should definitely be familiar with their design.

Chimney construction

The main differences of chimney products from different manufacturers are related to the technical characteristics of the pipe channels and the type of material used as a thermal insulation strip.

In most products of this class, the inner pipe is made of stainless steel, while the material for the outer pipe channel is usually more expensive copper or brass. In addition, these structures differ in the diameter of their constituent pipes, as well as the thickness of the insulation layer. Chimneys in different versions may also differ by the temperature conditions in which their normal operation takes place.

Mineral wool, which by its physical characteristics resembles well-known asbestos fiber, is used as insulation in sandwich constructions.

The thickness of the heat-insulating cotton wool gasket can be from 30 to 60 mm, which provides the necessary structural stability to the effects of aggressive media and elevated temperatures.

Among the undoubted advantages of sandwich chimneys include the following of their remarkable properties:

• reducing the likelihood of condensation to a minimum;
• low pollution of the chimney with soot;
• increased level of fire safety;
• attractive design;
• small weight of a design.

The lightness of the construction of the sandwich type chimney eliminates the need for foundation, which is another confirmation of its undoubted advantages.

Preparation for installation

Preparatory measures in this situation are reduced to the protection of the chimney passage points through the interfloor overlaps. For the safe laying of pipes in such areas a special structural element is used (the so-called “through-pipe”), the installation procedure of which is as follows:

1. Before installing the nozzle, the latter must be carefully prepared (closed outside by a layer of insulating material placed along its walls).
2. After this, the inner cavity of the nozzle is insulated and prepared for installation. For this purpose, the marking of the place of its laying in the ceiling is first made, and then an opening of the required size is cut.
3. Immediately thereafter, in the zone of contact of the nozzle with overlapping, the outer insulating layer is laid, after which the nozzle itself is mounted.
4. For the purpose of additional heat removal between the pipe and the main pipe, it is necessary to provide a small air gap.

The joining of chimney elements in the places of their passage through the ceiling is strictly prohibited.

Chimney assembly

Installation Features дымохода сэндвич своими руками мы предлагаем вам рассмотреть на примере хорошо известной большинству строителей двухконтурной системы.

Installation of structural elements is made from the bottom up from the heat source towards the exit of the chimney.

When assembling, the next section of the inner tube is inserted into the already mounted part, while the outer billet is simply put on the previous one. Such a procedure for assembling a structure will allow you to protect the chimney duct from the ingress of foreign moisture into it.

To all of the above, it should be added that during the installation of the “sandwich” chimney, one of the options for placing the exit part above the roof plane can be chosen.

Installation Features

When installing chimneys of the type under consideration, it is necessary to take into account a number of features of the following plan:

1. Sealing of the main channels is ensured by using a special sealant designed for a temperature of 100 degrees.
2. For reliable fastening of all structural elements (pipe bends, tees, etc.) clamps of a special form are used. To fix the chimney base on the wall, typical brackets are used, usually installed every two meters.
3. The length of the horizontal sections of the chimney construction should not be more than 1 meter.

In order to ensure the possibility of regular cleaning of pipes from the accumulated during the operation of the burning chimney should be equipped with a special hole with a door (the so-called "audit").

Video

Detailed instructions for installing the sandwich chimney and its features, see the following video:

A photo