Have wooden house there are many advantages and one significant drawback: the tree is a "living" material, and it breathes, changes its shape, gets sick, and eventually dies from age and various misfortunes. So you need to handle him carefully and competently, so as to prolong his health as long as possible. And if you are thinking of a house or a bathhouse made of a log, it is important to choose the right material for filling the gaps, otherwise it can just become the cause of the log house disease. Or maybe you shouldn't break your head and use regular polyurethane foam? Yes, our ancestors did not do that, but they did not have foam either.
Read in the article
- 1 What should be the materials for caulking so that the log house does not "get sick"
- 2 Than log cabins are traditionally caulked
- 3 Modern materials for caulking
- 4 Is polyurethane foam suitable for caulking?
What should be the materials for caulking so that the log house does not "get sick"
To prevent the wood from starting to rot, the house must maintain an optimal microclimate - that is, there should be no condensation and the effect of a can. And this breathing is provided by the materials that fill the space of the cracks. If insulation does not pass, but accumulates moisture, it remains between the logs, becomes a breeding ground for rot.
Than log cabins are traditionally caulked
No wonder we are talking about the experience of ancestors, because it has been tested for centuries. Traditionally log cabins caulk with dry moss, jute and tow. All of these materials are of natural origin. They, of course, breathe due to their fibrous structure, do not accumulate moisture, since it is thanks to their loose composition that they dry out quickly.
Finally, natural cauliflower will need to be refreshed from time to time.
Modern materials for caulking
It is the time-consuming "fuss" with natural caulk that makes you think about replacing it with modern sealants. There are two options available: silicone or polyurethane foam.
It is better to discard the silicone right away. Filling the cracks with this compound will tightly seal the frame, and the log will begin to rot, since moisture will have nowhere to evaporate from it.
And what about the foam? It is very tempting to apply it, because it perfectly fills everything, even very difficult gaps, and is it so easy to apply?
Is polyurethane foam suitable for caulking?
What are the benefits of foam? It is resistant to moisture, which is good, which means that this material will not accumulate water. The foam is non-flammable, has a high penetrating power and fills even the most difficult-to-reach places due to its expansion.
All these factors make the foam very attractive for caulking, but ...
After hardening, the foam ceases to be elastic, and the tree continues to change with age and depending on the season. That is, it expands and dries up, but the foam does not. And as a result, new cracks are formed, and this nullifies all the work.
Finally, this material is afraid of the sun, from which it becomes fragile. If you use foam somewhere, then it is imperative with a subsequent finish that protects it from ultraviolet radiation.
So polyurethane foam is not suitable for caulking, it's not a pity to admit it. The foam can only be used as a temporary measure and then, with the obligatory protection from the sun. And it is better to caulk a log house with natural material. How to do it correctly - in this video:
What do you think of log caulking material? Do you have any experience in this matter? Share it in the comments!
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