I have torn down old fiberboard in the living room that was worn and warped. Under these, the previous owner had placed old vertical outdoor paneling on horizontal studs. This stud was placed on a log frame.
The house has been relatively recently insulated externally.
Behind the paneling, it was previously sporadically insulated with mineral wool, clothing, and a bit of other odds and ends. We have removed this and tried to seal the gaps in the log frame that we could find.
Now to my question. Can we insulate with a clear conscience behind the paneling where there was previously some insulation here and there? I'm mostly thinking about how the dew point changes if you insulate more on "both sides" of the log.
Our intention is to then put OSB and gypsum on the paneling.
Depends somewhat on how much insulation is on the outside.
But 45mm inside is no risk. You might consider having a vapor barrier.
The downside of insulating the inside is that you lose a large part of the thermal inertia that the timber frame contributes (more stable indoor climate).
Depends somewhat on how much insulation there is on the outside. But 45mm inside is not a risk. You may consider having a vapor barrier. The disadvantage of insulating the inside is that you lose a large part of the thermal mass that the log frame contributes to (more even indoor climate)
Thank you for your comment. I don't know if it's visible in the pictures, but this log frame is a bit of a mix. The logs alternate both horizontally and vertically like a lego puzzle. I've tried to seal as best as I can, but there are still some larger holes that I feel would benefit from a bit of insulation.
If it were my house, I would fill the void with insulation to reduce the risk of drafts. Possibly plastic or vapor barrier. And then OSB and drywall on the existing boards (if they are straight).
There are opinions here on the forum that mineral wool and timber frame could be problematic, as well as interior insulation, but these are probably mostly theories. Here in Värmland, almost every house in the countryside is equipped with that construction and no known problems.
There are absolutely no problems with insulating a log frame, but you must choose a starting point. Some want to be building conservators and insulate with mineral wool without plastic. That rarely works well in the long run. If you're not a building conservator and ignore the qualities of the log frame, then you insulate as usual and then plastic and good ventilation after that. If you want to skip the plastic, you choose natural insulation like flax, then you've gone halfway at least.
