Warm Deck Roof Insulation

The main advantage of a warm deck construction versus a cold deck construction is that there is no need to include a ventilated cavity in the warm deck construction.

Warm deck roof insulation.

The insulation is immediately below the waterproofing layer. Fortunately these days there is a better form of insulation available for your flat roof. The warm deck roof design is the modern method for flat roof construction and is preferred wherever this option is possible. There are two basic categories of roof design.

In the case of a flat roof insulation is usually either a rigid board above the deck or a mineral glass wool quilt immediately above the underdrawn ceiling depending on the type of roof design and construction. Warm flat roofs do not need to be ventilated as the insulation is. The insulation can be adhered mechanically fixed or loose laid. We also have insulation boards suitable for more specialist roof applications for example inverted roof insulation and balcony insulation.

The layer of insulation is essentially placed outside of the roof. This system is called warm deck insulation and eradicates the condensation and venting issues associated with the cold deck system. The waterproof layer is above the insulation and a vapour control layer is placed below the insulation. The vapour control layer is above the decking but below the insulation.

A warm deck roof is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation. Cold deck roof a cold deck roof is where the insulation is placed between the joists rafters or in. This video will demonstrate how to install a cure it grp waterproofing system in a warm roof build up. The best method of insulating a flat roof is by using a warm deck flat roof construction method.

Cold flat roofs are typically avoided as you d need to install ventilation which can prove problematic for many reasons relating to space labour costs etc. No ventilation is required for these types of roofs. It also provides better thermal performance and makes it easier to eliminate thermal bridging. A warm roof has the insulation above the structural deck which is thus kept warm.

A flat roof where the insulation sits below the waterproof membrane and above the structural deck is a warm roof deck. We have a wide range of roof insulation products including flat roof insulation tapered insulation and pitched roof loft insulation.