I've been reading up on insulation for a cavity wall and seen some odd information. On the Rockwall website, they advise their insulated Rockwall Batts should be installed below the damp proof course? Is this correct, as surely if any insulation reaches below the damp course won't it wick up any moisture?
Cavity wall insulation - should it go below the damp proof course?
- Thread starter volks
- Start date
Per this guide:
"The installation of the batts should commence below the damp proof course (preferably by at least 150mm) with no risk of capillary action to minimise cold bridging."
"The installation of the batts should commence below the damp proof course (preferably by at least 150mm) with no risk of capillary action to minimise cold bridging."
One of the key characteristics of cavity bats is they supposedly don’t wick moisture. But they don’t tend to get used below dpc much, tend to just start them sat on the cavity ties at dpc level. Then perimeter PIR to reduce thermal bridging.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
