Help please on insulation options
Hi and thanks for reading,
timber frame due to go up in a couple of weeks, our plans show overkill in our opinion on roof insulation,
It's a dormer so habitable roof space and our plans show tlx gold under rafters, then 150mm celotex and a further 38mm of kingspan, we have been told this is overkill and very pricey!!!
We need to achieve uv 0.16 in roof any better suggestions?
Many thanks
So I've used it... Installed 7 years ago (Actis Tri-Iso 9) in a large extension.
And have the data to prove that it doesn't work as described hence my comments being what they are. It has low/nil sound insulation, is pretty poor at heat insulation in the summer and it works 'OK' in the winter however some of that is down to the detailing in how I installed it and ensured that there were no gaps at all at the edges and every joint was double taped.
The one I used was part of the legal /
