Cold Roof Construction Uk

In a cold roof the thermal insulation is laid between the joists below the structural deck.

Cold roof construction uk.

Guidance advice on warm cold roofs www cncbuildingcontrol gov uk. Part 3 pitched roof detail. Installing a warm roof can be extremely straight forward and simple to do. Part 4 flat roof construction.

Well a cold roof is created by laying insulation between the rafters. Part 2 pitched roof construction. With traditional cold pitched roof construction more insulation often means more interstitial and surface condensation too a danger that is aggravated by precipitation and wind. Basically there are two options to choose from when insulating a flat roof.

Covers pitched roof detail. Although not recommended today and actually banned in scotland until recently cold flat roofs were fairly common. Cold roof a cold roof is roof in which the thermal insulation layer is located between the ceiling joists meaning that everything above the insulation such as the rafters and any roof space will be colder than the living space below it. This allows air to circulate.

In practice because of the loss of heat and relative difficulty of providing adequate ventilation cold roof construction has largely been discontinued and in scotland banned. Cncd 053 v1 5 7 2019 warm deck roof 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. Tyvek and airguard membranes minimise interstitial and surface condensation in cold pitched roof construction while helping to ensure optimal energy efficiency. Which makes sense as this space is otherwise empty and so it s a simple low impact way to insulate a roof.

A cold roof design usually leaves a 50mm gap between the top of the insulation and the roof deck above. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings. This video shows the key features of a flat roof cold deck construction and how to draw the details to a scale of 1 10. When we talk about a warm roof vs a cold roof what we re really talking about is the insulation of the flat roof.

The majority of houses with pitched roofs will have what is now called a cold roof where insulation is laid on the floor of the loft area immediately above the ceiling of the upstairs rooms of the house.