Can you insulate inside a warm roof?
No, in a warm flat roof construction the insulation is installed on the cold side of the roof. It is an airtight construction with no gaps. Since the waterproofing membrane is placed directly underneath the insulation there is no need for any ventilation.
Do I need a vapour barrier on a warm roof?
Warm deck flat roofs can be constructed on most modern construction material types such as concrete, timber and timber based sheets. A vapour barrier will then need to be installed to reduce condensation in the roof structure.
Do you need to ventilate a warm roof?
A warm roof is designed to prevent any moisture from forming on cold surfaces in the roof construction. This means that warm roofs do not generally require ventilation, but there should be an Air & Vapour Control Layer (AVCL) or vapour barrier on the warm side of the insulation depending upon the detailing.
Do you need to vent a warm roof?
Do you need a vapour barrier in a warm roof?
Can you put insulation between joists on a warm roof?
Why you can’t just insulate between the rafters The general advice we give is that you should always insulate between and above the rafters (warm roof) or between and under the rafters (cold roof).
Does a warm roof need a vapour barrier?
How to fix a warm roof insulation?
For fixing warm roof insulation it is imperative that the fixing is installed into the middle third of the rafter, which is hidden beneath the insulation board. Thor Helical recommends the use of its patented alignment tool to ensure the build quality of the warm roof construction.
Why choose thorthor helical for warm roof fixings?
Thor Helical manufacture warm roof fixings for securing up to 150mm of insulation above timber rafters in energy efficient buildings. The Super-7 nails are used to sandwich a layer of insulation between counter-battens and rafters in warm roof construction.
Where do supersuper-7 warm roof fixings go?
Super-7 warm roof fixings are supplied in lots of 2500 and can be packed in distributor-supplied boxes or in resale bags of 50. For fixing warm roof insulation it is imperative that the fixing is installed into the middle third of the rafter, which is hidden beneath the insulation board.
Can a flat roof be blown off due to bad insulation?
i’ve seem a warm deck flat roof be blown off due it the insulation not being properly fixed down. very often the top layer osb is not put down as seen ‘to be not necessary’ Beware very over long screws need more torque and can have problems shearing off heads.