I have an old wooden house from 1922, and sometime during the 70s, bricks (real bricks) were added to the entire wooden facade outside.
Now I've started to remove some surface layers on the walls (exterior walls) indoors, with some kind of thin plywood board. Under this, I found beadboard paneling, which they have obviously ruined by painting it an ugly red, so I've decided to remove this as well. Underneath it, there is an air gap of about 10-15 cm to a wooden wall (I assume this is the old exterior wall???
My question is then, before I put up drywall instead of the wood paneling, should there be insulation in the air gap or should it remain an air gap?!
Grateful for a quick response!
//Jonas
Now I've started to remove some surface layers on the walls (exterior walls) indoors, with some kind of thin plywood board. Under this, I found beadboard paneling, which they have obviously ruined by painting it an ugly red, so I've decided to remove this as well. Underneath it, there is an air gap of about 10-15 cm to a wooden wall (I assume this is the old exterior wall???
My question is then, before I put up drywall instead of the wood paneling, should there be insulation in the air gap or should it remain an air gap?!
Grateful for a quick response!
//Jonas
If I understand correctly, there is an air gap on the inside of the massive wooden wall? It's not that it has wood shavings that have settled so you can't see the shavings where you've opened? Because it sounds strange if they built with an air gap there from the start, as it wouldn't serve any function.
I'm not 100% sure that it's the outer wall I see inside the air gap, but it should be, what else could it be? Also sticking a nail into the air gap from the outside if that might help..? Nope. there doesn't seem to be any trace of wood shavings either... but then it's all clear to tear off the paneling and add insulation and then gypsum without future worries? 
//Jonas
//Jonas