Installing double wall lining - step by step

Installing double wall lining - step by step


Double wall chimney is used to connect chimney pipes. The handyman can install the chuck himself in consultation with chimney sweepers.

1. Planning the connection according to DIN 18160

DIN 18160: 10.4 regulates the connections of connecting pieces to the chimney. According to the standard, the connections, such as a pubic ear pipe, must be located in the vertical part of the exhaust system so that they reach close to their clear cross section. At the same time, they should not protrude into the plant. All connections must be gas-tight and partially condensate-tight. Since metal connectors are subject to thermal expansion, the installer must also exclude their impact on the exhaust system. For single-shell flue gas systems made of mineral building materials or simply masonry fireplaces without insert tubes, double-walled chuck serves this purpose.

2. Advice with the expert

Caution: If you want to connect stoves, you must always consult a specialist. This regulation is intended to reduce the risk of fire and smoke poisoning. The chimney sweep therefore determines how big the planned oven should be. He also determines the place where the flue pipe connects to the chimney. For example, a stovepipe must not pass through cavities or cover several floors. Nor can two open fireplaces hang on a chimney. For combustible components, each pipe must also have the minimum distance of 20 centimeters.

3. Planning of the tube insert

The planning of the tube insert also takes place for safety reasons only in consultation with the chimney sweep. In this case, the purchase of the right double wall lining must be agreed with the expert. Important is fire aluminizing. The design of the exhaust pipe determines the diameter, which has the lining. Dependent on the substance costs between ten and 30 euros. For firing, use refractory mortar. In addition, rotary hammers with impact, chisel and hammer are useful tools.

4. Preparations for the masonry

In preparation, the homeowner draws the outline of the double wall lining on the chimney wall. Drill holes in the middle of the circle drawn and on the circle at intervals of about five centimeters each. What does not break out of the wall by itself, the homeowner suggests with a hammer and chisel. Attention: Wall residues in the chimney are a fire hazard - therefore remove them thoroughly.

5. Insert the double wall liner

The do-it-yourself dealer uses the double-wall chuck in the hole. It closes flush with the wall, but does not have to reach the inner chimney brick. Beware of overlapping with the oven section! Under no circumstances should the feed protrude into this cross-section. In the following step, the wall lining can be firmly installed in the wall.

6. Install the mortar with mortar

With refractory mortar, the homeowner now installs the inserted double-walled food. Larger distances between wall and lining are completely filled with the mortar. If the handyman has enclosed all the food, the surface must now dry. After installation, allow at least three days to pass.

7. Insert the tube into the chuck

After the drying time, the specialist will connect the tube. Ideally, it is a one-piece, sheet-steel segmented tube equipped with a revision flap.

Caution: This manual under no circumstances replaces the professional clarification and acceptance by the chimney sweeper.

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