Hopefully this video will help explain the difference between a warm flat roof construction and a cold flat roof construction.
Warm roof explained.
This video shows detailed drawings on how a warm flat roof is constructed.
This warm roof design was conceived through the use of a pod system patent granted finished off externally with lightweight tiles which are available in a wide range of colours to match your home.
Warm flat roof construction explained.
In this technique insulation is laid between the rafters.
A cold roof isn t as cold as the title suggests.
Warm roofs offer a superior thermal performance and therefore come with a higher cost.
I link to two other videos one on cold flat roof construction and one that s an in depth comparison.
The advantage of this is that thermal bridging is minimised and the labour cost is reduced as all the construction and assembly of the roof is carried out from the top of the extension.
With a warm roof the insulation is installed on top of the existing surface rather than in between the rafters.
In a warm roof the insulation is laid on top of a moisture or vapour barrier directly onto the flat roof deck which means that the insulation is continuous.
The great thing about a warm roof is that if your existing roof surface is in good condition you don t need to do much to it.