Warm Deck Flat Roof Eaves Detail

The insulation is immediately below the waterproofing layer.

Warm deck flat roof eaves detail.

In a warm roof the thermal insulation is immediately below the membrane finish the structural deck any voids and the ceiling are at a temperature close to that of the building s interior condensation control is achieved by using a vapour control layer vcl on the warm side of the insulation. The vapour control layer is above the decking but below the insulation. A warm flat roof or a built up roof bur is one where all the insulation is above the joists deck making them part of the warm fabric of the building. Warm roof ventilation specification for a simple duo pitch roof bs 5250 specifies sufficient ventilation as being.

The eaves detail shows where the roof members and coverings meet the wall of the dwelling. Inverted warm deck roof the insulation boards in an inverted warm deck are laid over the structural deck and the waterproof covering. The insulation is tapered to provide a fall to the roof to enable water to run to the water outlets. Warm deck flat roof the type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturer s specifications.

If ridge or eaves ventilation is not possible ventilation tiles can be used at high or low level to achieve the required airflow. This is placed over the roof joists and a. The cavity is closed with a proprietary cavity closer. This type of construction has the insulation above the roof deck thus keeping the deck warm.

The wallplate is then used to secure the rafter to. The wallplate is secured to the internal wall separated by dpc. Warm roof systems benefit from the insulation sitting above the deck. This is usually the most satisfactory construction for domestic properties as it avoids the need for ventilation of the roof.

The sandwich warm deck roof is the most common type of flat roof.