Flat Roof Support.

A flat roof or deck is composed of several elements: the support, the roof slope, the vapor barrier, the insulation, the seal, the apertures and protection or roof covering.

The flat roof or terrace is held up by a support, it fills the same role as the frame (for a pitched roof, for example).

Materials used for flat roof support

Three main materials are used for the support of the roof:

• Masonry: Mainly a solid slab made of:
• concrete
• composite
• reinforced steel, the concrete slab is cast in place 
• a slab of reinforced aerated concrete, which is in the form of blocks assembled on site
• Steel sheet:
• in a house, this technique is associated with a reinforced concrete slab
• ideal in homes with metal substructure
• Wood or derived timber: The support, borne by a rigid and solid wooden or masonry structure, may be:
• solid wood
• plywood designed for outdoor use
• Gypsum roofing boards (repellent treated)

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