Hello chaps,
Doing a 'between and over' warm pitched roof with Celotex. Just wondering how much you guys with more buying experience would allow for wastage?
Over layer is not too bad, few roof windows to chop around, but existing 60's rafters would have been 16" centres in old money, and vary a little bit, so a 1200 x 2400 sheet won't divide up perfectly inbetween.
Would you normally add 10%, or more? Don't want to over do it for obvious cost reasons, so grateful for any advice.
Cheers all.
Doing a 'between and over' warm pitched roof with Celotex. Just wondering how much you guys with more buying experience would allow for wastage?
Over layer is not too bad, few roof windows to chop around, but existing 60's rafters would have been 16" centres in old money, and vary a little bit, so a 1200 x 2400 sheet won't divide up perfectly inbetween.
Would you normally add 10%, or more? Don't want to over do it for obvious cost reasons, so grateful for any advice.
Cheers all.