
The method of insulating a pitched roof is particularly suited to loft conversions and refurbishment where the rafter depth is insufficient to accommodate the thickness of insulation required whilst providing a 50mm ventilation void (a requirement of the Building Regulations/ Standards for 'cold roofs').
This option is preferable to insulating only between the rafters (provided there is sufficient head room to accommodate the insulation) as it limits the cold bridge effect through the rafters. For this application we would recommend the use of Seconds between the rafters and Seconds beneath the rafters.
Fixing details

Now who in heavens name puts these sizes on the computer ???That's what i want to know for godsake 3mm difference.Anyway enough of my rant these are the better insulation value Kooltherm boards and if you double them up you could get some good insulation between ,wait for it, 64mm and 70mm.They are normally used underfloor but as always could be used in many applications provided the man or woman in charge approves of them.
£6.30 per sheet While Stocks Last
Nationwide deliveries to most mainland postcodes within 5 working days
See us on eBay
All prices exclude VAT
Please call for prices on our standard Kingspan stock range. Web offers are odd type or overstock boards we keep the full range of normal Kingspan and Kooltherm boards in stock