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

Every mason work has a certain insulation feature

Geposted am | Februar 25, 2010

The insulation value of construction material which was used to built your house was once determined by the Material Testing Office. It was determined by a certain temperature and humidity. It has been taken to account that every construction material includes natural dampness (equilibrium humidity). This dampness is needed for the materials main function, features and quality.

Bricks enclose a natural amount of dampness between 1,5 % and 5 %, depending on the brick type, production and basic material.

If a mason work includes more than its natural dampness (talking about a real kind of wall humidity) the insulation value of this wall starts to change. Every percent of dampness which is added to the natural moisture of a wall is a “damage causing moisture”.
For example if your mason work has a moisture of only 4% the insulation value of that mason work decreases to 50%.
But if mason work enclosures this 4% of moisture because its horizontal barrier is broken or capillary rising damp settled into the wall in purely mathematical terms this 40 centimetres strong wall is only 20 centimetres strong.
Same happens if condensation water was directed into a wall for several weeks, months or even years.

So if this moisture which is able to cause damages amounts 10% (that is the case in many old buildings) its insulations value has fallen below 25%.
Let’s take an example of a 40 centimetres strong wall: If a moisture of 10% reached into mason work it decreased the strength of that wall to only 10 centimetres. Imagine which effects are caused in view of energy loss and climate.

A leaflet created by the Bavarian ministry of economics reports about cost and economy of different energy conservation measures:
10% of wall humidity per year and per square metre of outer walls wastes 10 litres of heating oil or one cubic metre of gas!

Now you know how damp walls are able to cause unnecessary energy costs!

Werner Büsch ECODRY