Revisions log for Answer #1439

The procedure after the shell is such that first the roof is completed before water vapor or condensation.

So also before the windows, so it is guaranteed that the moisture can ventilate through masonry or concrete work before.

If the attic were not a heated living space, the thermal envelope would be incorrectly constructed.

I had such a case once, where the vapor barrier under the wooden ceiling was not given with an insulated top floor ceiling.

Mold formed on the foil and the beams. The cleaning brought only optically something, because the foil had pores for the water vapor diffusion.

The agent did not work in the pores and the joint between the foil and the rafter. (The rafter was wider than the base batten).

Since mold bloomed again and again, the foil was later replaced.