How To Build A Cold Flat Roof

In a cold roof construction the sarnafil membrane is installed directly to the structural decking usually timber with firrings to fall.

How to build a cold flat roof.

If insulation is installed below the flat roof deck this is called a cold roof. In the case of cold roofs the residential flat roofs have the waterproof placed directly on the deck and any insulation would be placed above the ceiling. Types of flat roof construction warm and cold flat roofs. As the name suggests a pyramid roof is a roof in the shape of a pyramid and is designed for a square building.

These roofs are mostly flat but usually have a bit of a slope. This arrangement allows the deck to become cold. Consider geography budget and use for the roof to determine the best option. Hip and pyramid roofs.

A note to consider before construction. In a cold weather such roofs are inherently prone to condensation which can cause material decay and deterioration. Building regulations state that a ventilation gap of at least 50mm must be in place between the insulation and the underside of the flat roof deck. For both a warm and cold flat roof a vapour control layer must be installed.

As such they allow for outdoor living gardens or a living space on top. For that reason cold flat roof construction needs to keep in mind the need for unblocked airflow. There are several methods and materials for the design of the exterior surface of a warm or cold flat roof. Flat roof construction can come in the form of a warm roof or cold roof depending on the requirement of the owner and architect as they relate to the building regulations regarding heat loss and insulation.