Warm Roof Explained

These roofs keep your home cooler during the hot summer months.

Warm roof explained.

You create a warm roof or a cold roof simply by applying the layers of the roof in a different order. A warm roof building will make the entire structure of the building warm in an attempt to avoid any cold bridging. In building construction roof pitch is a numerical measure of the steepness of a roof. 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.

I link to two other videos one on cold flat roof construction and one that s an in depth comparison. Warm flat roof construction explained. The great thing about a warm roof is that if your. What is a warm roof or a cold roof.

Namely the insulation layers. This video shows detailed drawings on how a warm flat roof is constructed. With a warm roof the insulation is installed on top of the existing surface rather than in between the rafters. These roofs do allow a bit of heat to escape from your home through the roof in the winter months.

Warm roofs will have a thermal insulation layer above the structure with no cold areas for the warm air to condense. A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface. Installing a warm roof can be extremely straight forward and simple to do. Warm roofs offer a superior thermal performance and therefore come with a higher cost.

Hopefully this video will help explain the difference between a warm flat roof construction and a cold flat roof construction. Flat roof construction explained. Therefore theres no need for vents in this type of construction. The thermal efficiency isn t as good as with warm roof.

The roofs can fail if the roof assembly is not properly installed or insulated or if the outside air is unable to absorb moisture faster than it is accumulated. My advice for your flat roof is a grp fiberglass system with a 100mm insulation warm roof. In a cold roof the insulation is applied between the rafters but in a warm roof the insulation is applied on top of the existing roof surface. 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.