Insulation help

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Arti

Well-Known Member
Been trying to work out the comparison u value of using celotex/kingspan or rock wool. Heard that you only need 100 mm celotex compared to 225mm rock wool?? Google can help me or may be I just can't find it.

Anyone know the craic??

Looked at a condensation issue and the roof space has no insulation so it's cold spotting.
It's a f**k on getting above the roof as access is tight so rather than using itchy scratchy insulation was planning to use insulation slabs just divvent naa who much like.

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Been trying to work out the comparison u value of using celotex/kingspan or rock wool. Heard that you only need 100 mm celotex compared to 225mm rock wool?? Google can help me or may be I just can't find it.

Anyone know the craic??

Looked at a condensation issue and the roof space has no insulation so it's cold spotting.
It's a f**k on getting above the roof as access is tight so rather than using itchy scratchy insulation was planning to use insulation slabs just divvent naa who much like.

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Is this at your own place mate? Or customer?
 
me personally would probably go for 150mm rock wool sl920 ( code might of changed now) slab with a 27mm Bg thermaline screwed to ceiling and maybe some thermaline on exterior wall tbh if that helps
 
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If that's not a flat roof I don't think that will solve your problem there arti, it won't harm to put some in like ,maybe a bit of heat and some vents will help.on the other hand if it is a flat roof it will do the world of good.
 
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