Cold Pitched Roof Build Up

There are three recognised designs of flat roof construction.

Cold pitched roof build up. Warm cold and inverted. A pitched or slanted roof has a terrain of at least 15 but it is often much more. Inclined along the line of rafters warm roof or positioned within the roof structure to form an insulated void room in roof which can result in warm and cold roof areas. Cold roof designing buildings wiki share your construction industry knowledge.

The construction build up for this can be seen on our online u value calculator. In this case we would suggest fitting kooltherm k7 pitched roof board between the rafters and kooltherm k118 insulated plasterboard to the inside face of the rafters. However cold roof insulation on an existing flat roof system is anything but simple. Cold roof voids are typically required to be ventilated.

A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface. 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. Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof. Cold roof insulation is most commonly used when a flat roof is first being created because it s a relatively easy process.

Warm roof in a warm roof construction the principal thermal insulation layer is located above the structural decking resulting in the structural deck and support structure being at a temperature close to that of the interior of the building. In pitched roof construction thermal insulation can be placed horizontally at ceiling level cold roof. The wooden rafters conduct heat much more than insulation which means you end up with something called thermal bridging. Flat roofs are usually made of variations of bitumen felt and function as durable long lasting roofs that are perfect for water run off in wet weather and protect wood and cement from potential build ups of damp and dry rot.

Pitched or sloping roof.