Nowadays houses must be draft-free and air tight. We used to place foam strips between the logs, this took care of the draft but it was not fully air-tight. Today we take a more rigorous approach: we completely wrap the house in an air-tight foil. Damp-open, but air-tight. We started wrapping yesterday, at the same time we are placing the main beams on the roof. These are maybe a little over-dimensioned, 60 kilos each, fully laminated, they will never bend.
Anybody that is in the process of designing and building a new house runs into this discussion: should we build with a damp-open construction, with damp-open walls and roof, or not? Because opinions differ, and the debate is heated, amoung architects and building engineers. One is more energy-efficient, but the other is more ecological… etcetera…
What is this all about? And what is better?
One of our offices is based in The Netherlands, and The Netherlands can be really chilly and uncomfortable. Wet and humid. And some Dutch clients think that their climate is not very suitable for a wooden house.
Let’s look at the facts. Below are four graphs, with the relative humidities in Utrecht (Netherlands), Ukmerge (Lithuania), and Moscow (Russia).
Some people want to build a house just from a single log (no additional insulation on the exterior). In such case between the logs we use a thin strip to stop any draft.
Understanding the new rules in France on house construction
As of January 2013 all house builders are facing a new challenge: the RT 2012. There is a lot of confusion about the new rules with everybody having his own interpretation of the law.
But most of the basics are not that complicated. This article tries to explain the basics. Continue reading