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Insulate heating pipes

Insulating heating pipes helps save heating costs

Homeowners who want to insulate their house in order to save heating costs usually think of doors and windows as well as the facade first. Insulating the heating pipes is often neglected, although this can save a lot of money. Heating pipes in particular often run through unheated rooms and cellars and thus lose heat. This waste of energy is then reflected in high heating costs.

Residents of old buildings in particular can reduce their consumption of heating gas by a good half by insulating the heating pipes and lines. Every year around 1.5 cubic meters of natural gas are required for every square meter of living space in old buildings. In the meantime, house builders and residents no longer have a choice: According to the Building Energy Act, heating and hot water pipes in unheated rooms must be thermally insulated.

How to insulate your heating pipes

You don't have to be a specialist or craftsman to insulate pipes and lines. Especially when the pipes are easy to reach, you can insulate them yourself without any problems. The easiest way to do this is to cover them with flexible foam tubes before laying them. You should therefore pay attention to this when building a new one. The flexible foam hoses are then attached with a special adhesive or bandage.

If you want to subsequently insulate your pipes, that is usually not a problem either. Then the tubes mentioned are first cut open on the long side with a cutter knife. Then the hoses are placed around the pipes. The slot is then sealed tightly with special adhesive tape.

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Be careful with corners and T-shaped lines

Only when cables run around corners do you have to show a little manual dexterity. Namely, when pipes run around the corner. In order to be able to provide good insulation here too, the hose ends must be cut to a miter, i.e. at an angle of 45 degrees. The two ends cut in this way must later make a 90-degree angle. The best way to get the 45 degree angle exactly right is to use a miter box. This makes the cut particularly clean. Once both ends have been joined, the point must be sealed well with adhesive tape.

Another sticking point for DIY enthusiasts is when pipes meet in a T-shape. In such a case, cut a wedge of 90 degrees into the horizontally running hose. The tube, which runs vertically, is cut twice at an angle of 45 degrees so that a point is created. This point must fit exactly into the cut out 90-degree wedge. Then the joints are tightly closed again with aluminum or special adhesive tape.

In the case of lines that run in a curve, you have to proceed in a similar way: Here too, wedge-shaped incisions must be made. By the way, there are also ready-made T-pieces as well as pieces in arch shape. You can of course also use this if you don't think you can cut it with a miter.


Insulating heating pipes saves energy costs, image source: co2online gGmbH

The choice of insulation material for pipe insulation

Flexible foam hoses are well suited for the subsequent insulation of lines and pipes. Plastic pipe sections or mineral wool are also recommended. If you want to insulate your heating pipes using the “do it yourself” principle, you also need a cutter knife and special adhesive tape.

The correct thickness of the pipe insulation material

As far as the thickness of the insulation material is concerned, there are fixed legal requirements. For pipes in unheated rooms, insulation material must be used that is approximately the same thickness as the inner diameter of the pipe. The consumer portal Verivox recommends using insulation shells that have at least thermal conductivity class 035 and are at least two centimeters thick.

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Tags:Insulation, thermal insulation