fyall":2h7khnva said:
Kingspan is alot more robust in a moist area than Rockwool hence its preference old buildings when wall construction and vapour levels are a bit of an unknown quantity.
I think it is really important on open forums to be careful that advice can't be misinterpreted. This advice, above, is fine for sheds. However, for houses it needs a few caveats.
Listed buildings officers need a lot of convincing in most circumstances when it comes to modern vapour resistant materials of all descriptions, including insulation. It would not be an appropriate way of insulating a 400 year old oak framed cottage, for instance, where wall "breathability" is an important part of making the whole building work.
In general, before you do any insulation work in an older property seek the advice of a profesional. There are so many options, and what is applicable in one circumstance may be completely wrong in another.
Mike