Would there be any harm in covering the existing floorboards with a vapour / airtightness control layer, then covering over that with plywood to help create a seal? I'm thinking it might be best to tape the VCL against the wall with airtight tape / sealant and cover with skirting. What do we think?
Hello! We're doing a mix of carpet and engineered wood floor for our renovation project - it's a 1930's bungalow, so at least we only have one floor layer to worry about.
We're unwilling to pull up the floorboards to insulate from the top-down as there is plenty of space beneath the floor to...