Flat Concrete Roof Thickness

Standard design and method of construction most concrete roofs follow a similar type of construction.

Flat concrete roof thickness.

The roof needs to be thick in order to provide insulation and proper protection. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. This cement layer is known as a screed and contrary to popular belief its purpose is not to waterproof the roof. The flat concrete roof itself can be up to 7 inches thick although the greater the thickness the more the concrete will need be poured in increasing numbers of layers with each one needing to dry before the next is poured.

It shall be known that plain structural footing is not suitable to be used for the top of piles. However the layers used to create these falls often impose an unnecessary additional load and bring no technical advantage. Im building a cinder block house in the cook islands an am planning to put a concrete roof on. Don t go with a flat roof have the concrete workers give a small taper to the roof so rainfall runs off instead of puddling on the surface.

A 10 to 15 cm thick slab of reinforced concrete with a thin 2 to 5 cm thick layer of cement on the top. They are often however part of a building design when future above roof level floors are contemplated. The minimum thickness for plain concrete structural footing is suggested by aci 318 14 and set as 200mm and the same value is suggested by ubc. What is the minimum thickness of a flat concrete roof for a house.

Structural concrete composite decks are somewhat uncommon at the roof level. The house is 14m by 14m. 0 0 0. A concrete roof is exactly what it sounds like.

For a flat roof to function correctly and to ensure the durability of its waterproof layers it is essential to prevent the accumulation of ponding water and ensure that rainwater run off falls are at the correct angle of slope. Exact specifications vary but most concrete roofs are several inches thick. Flat roofs come in many shapes and sizes which include parapet roofs roof decks and green roofs to name just a few of the options available. An exception to this standard however may occur if you intend to install slate concrete or tile shingles on your roof.

Like structural concrete roof decks composite decks are commonly topside insulated using adhered insulation panels or cast in place lightweight insulating concrete. Standard roof sheathing which consists of 4 by 8 sheets of plywood or oriented strand board or osb is 1 2 inch thick and attaches directly to the roof rafters or the roof trusses.