Hi all, new here, and I was hoping o get some advice regarding a contractor who has quoted on carrying out internal wall insulation of the external walls.
when he first came he said he would remove the plaster board and insulate behind with PIR board, then re-plaster, seems relatively legit? Now he’s saying so not to have to remove radiators in some rooms, they would cut out the middle section of plaster board, i.e. half way up the height of the wall and slide the PIR board down behind the plaster! Now, this to me seems, well, ridiculous.
I am no expert by any means, but apart from the obvious difficulty in sliding boards into that gap, shouldn’t there be an air gap to the stone external wall, and should there be any damp proofing membrane, the inability to create tight seals between the PIR boards etc?
Like I say I’m no expert, and that’s why I’m here, I don’t want to pay for what sounds to me like, a bad job waiting to happen, but equally, if it is legit I would like to be proven wrong.
thanks
