roofing felt with thermal properties?

ginola · 28 Jul 2015

This may have been asked more than once, but perhaps not recently and they don't seem to have covered thermal properties of felts.

I have a steeply (not sure that matters) pitched roof with fairly limited space for insulation (there's only room for around 75mm), and the felt needs replacing, so:

are there any felts that will significantly increase our thermal insulation?

I've seen this one for instance: SuperFOIL SFBB Reflective Breather Membrane, is it going to be any better than Roofshield for keeping us warm?

Also I was looking at Roofshield as I read it was 'self-sealing' around nails, is this the case? Is this unique to Roofshield?

noseall · 29 Jul 2015

How come there is no room to fit standard loft quilt insulation across the ceiling joists?

ginola · 29 Jul 2015

I've had a few tiles off and as far as I could see there is some 50mm Kingspan in there already, there is a bit of space between it and the tiles but not much, maybe there is more space under the Kingspan I don't yet know. As to why that's the case, I don't know, it was built in the early 1700's though.

^woody^ · 29 Jul 2015

I cant see any BBA certification for that foil, nor any convincing information to show that it is actually has thermal properties of any significant value worth the cost of fitting it.

ginola · 29 Jul 2015

Thank you!

It's actually cheaper than Roofshield, so would you recommend something different? Is there any felt that would help regarding insulation?

I've had a few tiles off in a few places and I can fit 150mm insulation in some places, only 100mm in others, what can I do to increase the thermal insulation?

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roofing felt with thermal properties?

ginola

noseall

ginola

^woody^

ginola

DIYnot Local

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