Cold Deck Roof Construction

In the case of cold.

Cold deck roof construction. 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. Guidance advice on. Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs. Ashford building services can quickly and economically convert any cold deck flat roof to a warm deck insulated flat roof particularly where problems have been tackled sooner rather than later.

Where the existing roof deck is in satisfactory condition and of a suitable material e g. Ventilation is required for these roofs. Less thermally efficient than a warm roof construction cold roof construction remains the most common form of construction for existing flat roofs. The breakdown warm roof vs cold roof.

It is usually the most acceptable type of construction for domestic possessions and belongings as it avoids the need for aeration of the roof construction. Cold deck roof a cold deck roof is where the insulation is placed between the joists rafters or in between the ceiling joists in the case of a pitch roof. Plywood the insulation is fixed directly on top often with. A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface.

In case of warm roofs they have an insulation above the roof deck in this way it keeps the deck warm. This cold deck construction is considered problematic in the humid temperate climate of the uk where the effective ventilation of restricted roof voids may be impractical particularly in sheltered built up areas. Throughout the course of the year the roof deck and all below it is kept at a temperature close to that of the inside of the building therefore the roof structure is protected from extremes of hot and cold lessening the potential for damage caused by thermal movement. Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof.

A cold roof construction will normally comprise of a structural deck on joists or purlins with a ceiling layer fixed to the bottom of the joists purlins thereby creating an air layer or cavity within. The membrane is then attached to the insulation.