Hybrid Warm Deck Flat Roof

Flat roofs are among the simplest construction elements that can feature in a building.

Hybrid warm deck flat roof.

In the case of a flat roof insulation is usually in the form of either a rigid board above the deck or a fibrous quilt immediately above the ceiling depending on the type of roof construction. No insulation is on top. Hybrid cold flat roof. Single ply pvc no backing flat roof board hybrid 25 hybrid 25 is a laminated flat roof insulation board with our jablite flat roof board factory bonded to a 25mm thick fibre faced pir panel.

The recognised flat roof build ups for best design practices are. The roof itself is therefore kept warm. The two classic types of flat roof designs are the warm flat roof and the cold flat roof. Flat roofing solutions the xtratherm range of high performance insulation boards provides the ideal technically advanced solution for flat roof projects.

Traditionally flat roof constructions fall in to two camps. D h b p ch 5 0. Easily the most frequently asked question to the celotex technical centre is with reference to hybrid flat roofs. In a warm roof construction with no height restrictions insulation levels can ensure that no condensation occurs within the build up.

Designed specified and constructed correctly a warm roof will keep the roof structure at the same temperature as the building s interior eliminating the possibility of condensation occurring and ensuring the roof performs for the life of the building. By majority the rule of thumb is that in a domestic house not flats approximately a third of the total thermal performance of insulation can be placed below the deck with two thirds above the deck sometimes this is called a hybrid warm roof. In this context the term hybrid flat roof refers to a timber flat roof construction that is insulated both between and over the joists. Warm flat roofs and cold flat roofs.

Xtratherm manufactures an extensive range of high performance pir flat roof insulation boards that include tapered insulation providing comprehensive technically advanced solutions for all. In the case of a flat roof insulation is usually either a rigid board above the deck or a mineral glass wool quilt immediately. A hybrid cold flat roof is one where at least 2 3rds of the insulation is above the roof deck or joists. In addition there s a third type the warm flat roof with airflow that s essentially a hybrid version of the warm flat roof and the cold flat roof.

Flat roof design guide. There are design differences for each type. In each case the name refers to the position of the insulation in relation to the roof deck. However the presence of insulation below the deck in a hybrid roof brings the dew point down potentially threatening the roof structure and spaces below it.

A warm roof features a structural deck vapour control layer insulation and waterproofing a tried and tested solution that the industry knows works. The laminate provides separation from the membrane and protection from solvents during installation of the weatherproofing. Ventilation is not needed in a warm roof. However this is a general guide and could change depending upon the building use location and humidity class.

Warm cold and inverted.