Which Is Best Warm Or Cold Roof

Warm roofs in case of warm roofs they have an insulation above the roof deck in this way it keeps the deck warm.

Which is best warm or cold roof.

Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof. Warm roof construction requires that the entire roof construction is encapsulated within the insulation envelope of the building to be kept warm. A warm roof construction allows heat to be conserved within a property without the need for a ventilation system. There are pros and cons to both a warm roof and a 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. A warm roof is much more straightforward to install and provides a superior thermal performance and is therefore more costly. However it must be pointed out that a cold roof requires more work and isn t as thermally efficient as a warm one. The recognised flat roof build ups for best design practices are.

This is because the insulation is laid over the top of the roof deck on top of a vapour control layer and underneath the roof covering. A warm roof construction has many benefits over a traditional cold roof essentially it is a breathable roof construction which allows moisture to escape which in turn prevents damp and any associated decay problems. In the case of a flat roof insulation is usually either a rigid board above the deck or a mineral glass wool quilt immediately above the underdrawn ceiling depending on the type of roof design and construction. Basically the term cold roof refers to a traditional roof or vented roof while hot roof refers to a roof that is not ventilated and which has foam insulation attached directly to the roof sheathing.

A cold roof is best when you re initially creating a flat roof and is cheaper than a warm roof but does provide an inferior thermal performance. The reason for this is because an unvented roof allows more opportunity for conditioned air from the home to permeate the insulation warming the roof deck and causing ice dams during the winter. In contrast a warm roof is one designed to keep the entire roof structure warm. In climates that remain cold for a sustained period unvented roofs can cause more harm than good.

The object being to design out the possibility of warm moisture laden air coming into contact with a cold surface and condensing. This process offers a greater level of thermal insulation for your whole property.