Francie 6,362 Posted November 29, 2020 Report Share Posted November 29, 2020 What's the best to use these days,is the kingspan the best or the rolled stuff? Quote Link to post Share on other sites
NEWKID 26,191 Posted November 29, 2020 Report Share Posted November 29, 2020 What type of roof mate? Or are you insulating your attic? Quote Link to post Share on other sites
Francie 6,362 Posted November 29, 2020 Author Report Share Posted November 29, 2020 (edited) 7 minutes ago, NEWKID said: What type of roof mate? Or are you insulating your attic? Yes newkid my attic it's roughly 8by6 metres Edited November 29, 2020 by Francie Quote Link to post Share on other sites
NEWKID 26,191 Posted November 29, 2020 Report Share Posted November 29, 2020 6 minutes ago, Francie said: Yes newkid my attic it's roughly 8by6 metres Just rolls of insulation in the attic mate will be fine, they come pre cut at 600mm centres i think so you can roll between your joists... Quote Link to post Share on other sites
Francie 6,362 Posted November 29, 2020 Author Report Share Posted November 29, 2020 1 minute ago, NEWKID said: Just rolls of insulation in the attic mate will be fine, they come pre cut at 600mm centres i think so you can roll between your joists... Goodman,but is the kingspan better? Quote Link to post Share on other sites
NEWKID 26,191 Posted November 29, 2020 Report Share Posted November 29, 2020 Just now, Francie said: Goodman,but is the kingspan better? Insulation board (Kingspan is one of many) has better U-Value for its thickness than rolled insulation, so in short yes... But it is very expensive and a nightmare to fit in an attic, I've used it under the roof in the vaulted ceilings as I havent got the space to use rolled insulation.. We use it loads on built up roofing systems, particularly the new zinc type systems.... the last one we did had 50mm rockwool slab, 150mm insulation board abs 30mm rockwool slab on top...the new building reg specs are mental! Quote Link to post Share on other sites
Francie 6,362 Posted November 29, 2020 Author Report Share Posted November 29, 2020 2 minutes ago, NEWKID said: Insulation board (Kingspan is one of many) has better U-Value for its thickness than rolled insulation, so in short yes... But it is very expensive and a nightmare to fit in an attic, I've used it under the roof in the vaulted ceilings as I havent got the space to use rolled insulation.. We use it loads on built up roofing systems, particularly the new zinc type systems.... the last one we did had 50mm rockwool slab, 150mm insulation board abs 30mm rockwool slab on top...the new building reg specs are mental! Thank you kev,if I used the rolled stuff would it be ok boarding over it then? Quote Link to post Share on other sites
NEWKID 26,191 Posted November 29, 2020 Report Share Posted November 29, 2020 2 days just insulating and putting fixing rails through...no heat coming out of this place!! 2 Quote Link to post Share on other sites
NEWKID 26,191 Posted November 29, 2020 Report Share Posted November 29, 2020 Just now, Francie said: Thank you kev,if I used the rolled stuff would it be ok boarding over it then? Yes mate, are you turning it into an attic room? If so you will need to insulate the roof void, under your felt between the rafters.. Quote Link to post Share on other sites
Francie 6,362 Posted November 29, 2020 Author Report Share Posted November 29, 2020 11 minutes ago, NEWKID said: Yes mate, are you turning it into an attic room? If so you will need to insulate the roof void, under your felt between the rafters.. No mate,just looking to insulate to keep the heat in,if I put the rolls between the rafters then more rolls crossed above that,would that be good or a waste,I was thinking double it up,that or in between then ply it out? Quote Link to post Share on other sites
NEWKID 26,191 Posted November 29, 2020 Report Share Posted November 29, 2020 31 minutes ago, Francie said: No mate,just looking to insulate to keep the heat in,if I put the rolls between the rafters then more rolls crossed above that,would that be good or a waste,I was thinking double it up,that or in between then ply it out? Insulation between the joists, as much as you can (probably 150mm or 200mm depending on joist depth), ply on top and then you can store easily up there...thats what I would do anyway.. 1 Quote Link to post Share on other sites
brambles 3,062 Posted November 29, 2020 Report Share Posted November 29, 2020 Make sure what ever insulation you use in your roof leave a space for air flow 1 Quote Link to post Share on other sites
Francie 6,362 Posted November 29, 2020 Author Report Share Posted November 29, 2020 2 minutes ago, brambles said: Make sure what ever insulation you use in your roof leave a space for air flow What do you mean bramble? Quote Link to post Share on other sites
NEWKID 26,191 Posted November 29, 2020 Report Share Posted November 29, 2020 Just now, Francie said: What do you mean bramble? If you were putting insulation board under your roof tiles, so up in the rafters you would need to leave a space between the roof and insulation for air flow... But you will be insulating above you ceiling, so the air flow won't be affected 1 Quote Link to post Share on other sites
Francie 6,362 Posted November 29, 2020 Author Report Share Posted November 29, 2020 6 minutes ago, NEWKID said: Insulation between the joists, as much as you can (probably 150mm or 200mm depending on joist depth), ply on top and then you can store easily up there...thats what I would do anyway.. Thanks newkid Quote Link to post Share on other sites
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