Previously we wrote about types of wood (wet, dried, laminated) and the shrinking of log houses and how we deal with the shrinking. In this post we want to show a little more about the actual drying process, and cracks. Because drying and cracks are very much related.
Why Does Wood Crack?
The photo below shows a crack in a wooden disc. Why does wood crack like this? Very simple: drying.
cracked wooden disc
When wood dries, the drying process starts at the outside of the logs. While the humidity goes down from 15% to 12% near the outside of the log, more to the the center of the log the humidity initially remains at 15%. And that is a problem.
Long ago the quality of a wooden house depended on the location of the factory. A factory in the north used wood from the north, which was growing more slowly and was denser and heavier.
But times have changed. First of all there is a very active European wood market, and just like oil, wood is a raw material that is being actively traded all over the world. Also modern wood treatment techniques have improved the quality of wood as a building material in such a way that nowadays more factors come into play. It is not just northern wood that is a good building material. Continue reading
A wooden house will shrink. No matter how dry the wood was initially, over time, during a period of approximately two years, all residual humidity will slowly evaporate from the wood and the wood will become more dry. Wood shrinks in one direction only: lateral, but not longitudinal, or in other words, logs will become thinner, but not shorter.
How Much Will A Wooden House Shrink?
Why do we use laminated wood? Why is laminated wood better than an old-fashioned simple solid log? This post will try to explain.
To better protect wood against rain, wind and the sun, usually it is impregnated. There are different wood treatment methods.