Good evening everyone,
hello Theodorius,
we have natural oak floorboards on underfloor heating. They were treated with linseed oil and are wiped with very fatty soap while slightly damp. We have been living on them for two years now, and they are – well maintained – really low maintenance, super practical, and look good. You can simply sand out any scratches. They are solid boards, only grooves were milled at the back so they don’t cup. We chose beveled edges because you won’t get the joints invisible anyway.
We specified the flooring during the planning discussion. The thermal transmittance value of the 15mm boards is 0.07. That is almost as good as tiles and it heats just like that.
We fully glued them onto the screed. You have to sand the screed beforehand. Of course, we left out expansion joints, which were filled with cork strips. With adhesive, you have the choice between the devil and Beelzebub. Roughly speaking: if the glue is supposed to be emission-free later, you have to expect emissions during processing. It also works the other way around. You can avoid all this if you lower your requirements for the adhesive. There are adhesives that after 10 years lie as fine dust under the boards; those were then bio. I chose an adhesive that was not too fast and remains somewhat elastic. For that, I read the technical data sheets and checked them against the supplier’s material recommendations. The viscosity was still unexpectedly beastly high, so the material cost us some practice time and many cleaning cloths at the beginning.
We got good and inexpensive material from Dielenkontor Nord as well as expert advice. I can recommend it in good conscience.
Softwood never achieves such good values as oak. We would do the oak floorboards again anytime. You can invest the same amount for a more short-lived parquet.
Best regards
Gabriele
