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Warm Roofs

In cold places such as Europe and Northern USA where heated buildings are the norm, air is 'conditioned' to control the humidity and keep the heat in. In hot countries where the emphasis is on cooling, insulation and vapour barriers are used to keep the heat and moisture out.
Buildings in hot countries are typically constructed with a warm roof. The insulation is in direct contact with the underside of the roof, and a vapour-control layer is installed on the underside of the insulation to limit moisture infiltration to the underside of the roof. These systems require careful design and engineering and are, therefore, marketed as proprietary systems. SeeĀ Insulated Panels.

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