Warm Deck Flat Roof Eaves Detail

The vapour control layer is above the decking but below the insulation.

Warm deck flat roof eaves detail.

This is usually the most satisfactory construction for domestic properties as it avoids the need for ventilation of the roof. This type of construction has the insulation above the roof deck thus keeping the deck warm. The insulation is immediately below the waterproofing layer. The cavity is closed with a proprietary cavity closer.

Warm roof systems benefit from the insulation sitting above the deck. The wallplate is then used to secure the rafter to. Inverted warm deck roof the insulation boards in an inverted warm deck are laid over the structural deck and the waterproof covering. 25mm at eaves on each slope and 5mm at ridge.

The sandwich warm deck roof is the most common type of flat roof. The wallplate is secured to the internal wall separated by dpc. This is placed over the roof joists and a. The insulation is placed below the waterproof covering and is either mechanically fixed or bitumen bonded on to the top of the deck.

This enables the temperature of the structure and the deck to be kept close to the temperature of the inside of the building hence warm. The eaves detail shows where the roof members and coverings meet the wall of the dwelling. If ridge or eaves ventilation is not possible ventilation tiles can be used at high or low level to achieve the required airflow. 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.