I have searched through all the postings on this subject but concluded I would create my own as it has one difference.
My house in France has 60 cm walls constructed from stone / flint / mud mortar and rough plastered with lime render. They appear to be dry. I am thinking to insulate the North facing walls because for the last two years we have temperatures of -16 and below coming in on a north wind.
I have found a source of 50mm Kingspan seconds not too far away and was proposing to dot and dab leaving a 10mm gap between boards / ceiling and floor. When adhesive is dry I would seal all these gaps with expanding foam and then tape joints with silver foil tape. Over the kingspan I then intended to dot and dab plasterboard, scrim and fill joints.
I know some postings and tech info talk about not using dot and dab on solid walls, but because of the thickness of my walls and their dryness, I am thinking it would be OK. Am I right in understanding that the Kingspan boards have their own vapour barrier ?
What do others think.
My house in France has 60 cm walls constructed from stone / flint / mud mortar and rough plastered with lime render. They appear to be dry. I am thinking to insulate the North facing walls because for the last two years we have temperatures of -16 and below coming in on a north wind.
I have found a source of 50mm Kingspan seconds not too far away and was proposing to dot and dab leaving a 10mm gap between boards / ceiling and floor. When adhesive is dry I would seal all these gaps with expanding foam and then tape joints with silver foil tape. Over the kingspan I then intended to dot and dab plasterboard, scrim and fill joints.
I know some postings and tech info talk about not using dot and dab on solid walls, but because of the thickness of my walls and their dryness, I am thinking it would be OK. Am I right in understanding that the Kingspan boards have their own vapour barrier ?
What do others think.
