A flat roof is not as simple as the name suggests. While the structure is relatively straight forward, the internal components consist of a layer of several different materials. The layering of the materials gives the roof its strength and insulation.

The layers consist of the following, from top to bottom:

Surface Layer: The top layer of a flat roof consists of surface protection. This consists of a specially hardened material designed for protection against the elements.

Waterproof Layer: The layer below is that of a waterproof material. Another layer added to protect against the damp and water that seeps through the surface layer.

Insulation Layer: The next layer down is the insulation layer. This is designed to keep as much heat as possible within the rooms below.

Vapour Control Layer: Designed to maintain protection from dampness as well as insulation against the air outside.

Deck: A hollow base that the roof sits on. Providing structure as well as acoustic and heating insulation.