Roofing is probably the most widespread application of foamed concrete. It provides a high degree of thermal insulation and it can be used to lay a flat roof to falls, i.e. to provide a slope for drainage.
In countries where roofs are flat and where roof surfaces are used as part of everyday life, foamed concrete is strong enough to support foot or even vehicular traffic on the roof.
Foamed concrete is also much lighter than slopes made from mortar screeds. This means that a roof with a slope made of foamed concrete imposes a lower loading on the structure of the building
