Hello
Was planning to install insulated plasterboard on a couple of external walls, and I had thought dot and dab and some mechanical fixings as back up was the way to go. However I've recently read that unless it's a new build (which it isn't) dot and dab should be avoided as it creates the potential for interstitial condensation in the airgaps.
Sure enough, this Retrofit Internal Wall Insulation Guide (p.42) says best practice is a continuous layer of adhesive. That's a bit of a problem because I was hoping dot and dab would help level up some of the wall's unevenness.
So is it just 'best practice' and the risk is minimal, or should I be avoiding dot and dab altogether? Thanks.
Was planning to install insulated plasterboard on a couple of external walls, and I had thought dot and dab and some mechanical fixings as back up was the way to go. However I've recently read that unless it's a new build (which it isn't) dot and dab should be avoided as it creates the potential for interstitial condensation in the airgaps.
Sure enough, this Retrofit Internal Wall Insulation Guide (p.42) says best practice is a continuous layer of adhesive. That's a bit of a problem because I was hoping dot and dab would help level up some of the wall's unevenness.
So is it just 'best practice' and the risk is minimal, or should I be avoiding dot and dab altogether? Thanks.