Instructions for draining a wall

Especially with Kellermauern the problem of damp walls is known. However, any above-ground wall can get wet and must then be put back dry. The faster that happens after the detection of moisture or moisture, the less damage and labor.

Water pipe break or other cause

When a wall becomes damp, it is almost always due to building defects. Obvious are defects in sealing and insulation, but also salts whose formation and action are a frequent cause. Before you dry a wall, researching the causes and investigating the actual damage is indispensable. So often to find handicrafts mistakes, so often in the lack of diagnosis wrong conclusions are drawn.

Before a complex is rehabilitated, should be considered in the thorough inventory of physical laws that are not common to all laymen. After exclusion of purely mechanical excessive water supply through leaky pipes or clogged drains, the masonry must be assessed. In the case of a mechanical leak, the wall must be resealed after dry laying.

Summer condensation or salt enrichment

If the moisture mainly or exclusively occurs on the inside of a wall towards the enclosed space, the moisture can result from regular condensation. The cause is an unfavorable to faulty air exchange, especially in the summer. With this cause, a restoration plaster to dehydrate can be sufficient if the same time the air exchange in the interior is improved and optimized.

Very often, salts in the masonry are the cause of the moisture. Wall saltpetre, road salt splashes and other salt accumulations "pull" the water into the wall. After measuring the salt content of the bricks, the salt must first be neutralized when dry before structural isolation measures can be taken to prevent re-entry.

So walls can be drained

1. Pressure-free injection

Down-tapered holes are filled with tough sealant, which is distributed by gravity in the wall. It seals against rising damp, but does not dispose of existing moisture.

2. Heated injection

By heating, the introduced sealant spreads faster and better and displaces partially water-filled capillaries when used properly.

3. low pressure injection

In several operations, a microemulsion of silicone is pressed into the masonry and displaces the water from the capillaries at each pass.

4. Wall sawing method

The mechanical gradual cutting of the wall, a sealing layer of plastic or stainless steel is mounted in the wall, which prevents rising damp.

5. Electric dipole drying

The attachment of several electrodes in the wall repelled by repelling the water therein and prevents the Nachfluss. Conflicting is the possibility of binding salt ions in this way.

6. Restoration plaster

In principle, a sucking plaster, which often has only laminating effect. A special variant is the so-called "sacrificial plaster", a simple lime plaster. It is applied and renewed several times after it has absorbed moisture from the wall.

Tips & Tricks

Independent information is available from the offices for monument protection, university faculties of building physics and the Chamber of Architects.

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