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How to prevent mold: The best building materials against fungal attack

prevent mold

The best thing to prevent mold is to create indoor climate conditions in which mold does not even arise. You can create these conditions, for example, with lime paints and lime plaster, capillary-active building materials or highly heat-insulating walls.  With these building materials you can prevent mold.

Prevent mold: how to treat it

If mold has taken root, it must be removed. Otherwise there is a threat of damage to health. So that it does not even come to the mold, even when building or renovating room climate conditions can be created to prevent mold.

We introduce you to three measures against mold. You can work with lime plaster and lime paints, capillary-active building materials or polyurethane building boards that absorb moisture with their incorporated silicate layer.

But even with these measures continues to apply: Several times daily bumps and sufficient heating.

Lime plaster and lime paint prevent infestation

There are conditions in which mold does not even arise: for example, on lime paints and lime plaster, because they have a highly alkaline effect. The order of both building materials is quite simple.

Apply lime paint with a brush or roller. The substrate must be level and primed for this. The fine-grained plaster is only a few millimeters thick and is raised with the trowel. It can be painted over with lime and dispersion paints.

1.) apply lime paint with brush or roller. The substrate must be level and primed.

2.) Kalkfeinputz is only a few millimeters thick and is raised with the smoother. It can be painted over with lime and dispersion paints.

The wall against condensation

So-called capillary-active building materials can influence the surface temperature as well as the moisture load of the wall so favorably that mold does not stand a chance.

Actually, capillary active building boards have been developed as a problem solver for the building physics sensitive internal insulation.

Their effect is based on the composition of the material, which absorbs the condensate accumulating in the building board and, over time, dissipates it back to the room without moistening itself.

Due to the porous structure of the panels they are particularly heat-insulating, which keeps the surface temperature of the wall above the critical range of 12-13 degrees. Condensation can therefore not occur, the wall remains dry.

Capillary active building boards

The moisture responsible for mold fungus growth is absorbed through the capillarity of the system, cached and released quickly and effectively in times of low humidity.

The mold remediation consists of 30 mm slender iQ-Therm plates and the capillary-conductive special filler iQ-Top SLS. The whole thing works only as a system.

The result, with minimal wall construction, is a safe, hygienic minimum thermal protection and increased living quality through regulation and improvement of the indoor climate.

Assembly of construction panels

The glue is applied to the wall with a 10 mm toothed trowel. Important is a uniform adhesive layer thickness.

The plates are also provided with adhesive. This ensures that there are no voids trapped behind the panel. When pressing in the panels, it is important to “float in” them with short lateral movements.

Reinforcing mesh and reinforcing plaster ensure that there are no cracks on the plaster surface. After complete drying, a fine leveling and paint application follows. The wall is now safely protected from mold.

After complete drying follows a fine leveling and the paint application. The wall is now safely protected from mold.

Highly insulating wall

Same mode of action, different composition. In this construction panel is a polyurethane plate of the carrier, a silicate layer provides moisture absorption.

Starting in a corner of the room, the panels are glued to the walls over their entire surface. The elements are room-high. Between the elements you use springs, which simplify the flush alignment considerably.

Special screws additionally secure the plates. They are set in the plate joints after pre-drilling. Finally, all plate joints must be leveled and sanded. The area is ready for painting.

Gerhardt Richter is a writer and a trainer at trade technical colleges, specializing in carpentry, plumbing and construction.

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