I have been redecorating the rooms in our 1925 non cavity wall brick built semi, and taking the opportunity to remove/re-plaster, as well as insulating the outer wall with 25mm kingspan. To prevent losing too much room space did not leave a void, only the natural gaps from the unevenness of the wall. Seems to have helped, but would it have been much better to have a 25mm airgap? Also we have a huge end wall which the stairs go up, so next job is that wall, what would be better 15mm with airgap/25mm no air gap? or to make it as easy what effect would 15mm no airgap produce in insulation value?
Insulations questions.
- Thread starter brek01
- Start date
Sponsored Links
Air gaps allow air convection, so worsen u-values, though I believe it has more of an effect when it's external not internal insulation (external insulation would be better in your case, but obviously much more hassle and cost).
Sponsored Links
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
