Do you have trouble with mould, damp walls and mason work? This blog may help you!

Damp mason work and damp walls are two different things

Geposted am | Februar 20, 2010

The term “damp walls” relates to surface dampness of walls (condensation or hygroscopic moisture). Causes for damp walls are usually heat bridges, cooling below dew point or temporary high humidity after taking a hot shower in the bath for example.
To fight damp walls other steps have to be taken than to fight damp mason work.

The first step is an intelligent ventilation of rooms in the case of damp walls. If you keep the windows of your basement open during all summer long hot and humid air is able to come in. Quick condensation water is produced on cool cellar walls, which starts to soak the walls.

The same applies to our flats, which are build according to the latest regulations about insulation. They work similar to Cheese Bells made of plastic without any exchange of air.
So it’s no surprise that moisture caused by breathing, cooking, showering cannot avoid. Those kinds of moisture are produced daily and nearly everywhere. The dampness settles on the walls surface. Breathing ability of walls can become impossible from indelible paintings and synthetic coatings. The only way to help is an intelligent airing of rooms or using ventilation technology.

Damp mason work is a completely different topic: Dampness of mason work is usually caused by outer damages. Either moisture spreads from the soil through fundament by a destroyed or non-existing horizontal barrier to the mason work. Or it spreads up from the fundament capillary during the decades. Another possibility is that moisture pushes from the outside through a damaged vertical insulation into mason work.

Moisture inside mason work (talking about the core of walls) spreads over the capillary structure. How slowly or fast it may spread depends on construction material. For example concrete which is compressed doesn’t let dampness spread quickly. But it can spread much quicker in porous bricks or rapidly in artificial lightweight-concrete blocks.
Wall humidity comes from inside even when it is noticed by salt efflorescences, flaking plaster or paint damages, which causes are assumed to be damp walls. But damp mason work has completely different causes than damp walls, which are mostly caused by condensation water.

Ventilation doesn’t help with damp mason work anymore but can make it worst! By airing rooms the cause (a kind of replenishment of capillary raising damp from the outside or basement) isn’t stopped.
The only solutions for this problem are mechanical or chemical barriers, when functioning, or using electrical systems like the latest system of ECODRY.

Werner Büsch ECODRY