That's the thing, the calculations don't add up for tri ISO ,we weren't approved to. Use it last year even though we used the previous yr ,we also did two houses recently which were approved its usage
Ashphaltic /SIG do a product that out performed tri iso, local authority building control would only accept tri iso, but approved inspector accepted Ashphaltic,'s product.. About £25 a roll cheaper
It's down to individual councils I done lofts years ago and so e would some wouldn't just ask it's benefit is it's quicker and if done right just as good
@Danny most merchants stock it, it used to work out about £120.00 a roll, i find the super quilt better its a little bit cheaper and goes a bit further, also the edges are seamed together so easier to work with. I don't know what the difference is in thermal values but the last couple ive done have both had good reports back.
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