Inverted roof technology enables the design of both non-usable roofs, as well as terrace roofs accessible to people along with elements of small architecture.

In each of the variants of the roof, the roof is reversed with a very durable technology and resistant to construction damage. Waterproofing layer located on the ceiling, preferably from double-arranged bituminous roofing felt with a pool eversion on the walls and attics, it is sheathed with thermal insulation boards and a drainage and protective layer of rinsed gravel. Careful execution of waterproofing practically ensures its indestructibility. In addition, in a terrace roof with an inverted layer arrangement, concrete slabs or paving stones are grouted with sand, creating a coating of independent small-sized elements, which are not threatened by any thermal spasms and cracks – typical for ceramic tile floors glued on mortar.

Terrace roofs with an inverted arrangement of layers can be made as a floor raised from openwork boards on a wooden structure, based on steel brackets. This is an example of a simple and reliable solution – which is an alternative to traditional ceramic tile terraces.

The waterproof layer and thermal insulation of extruded polystyrene are laid on a concrete slope screed in the inverted roof arrangement. An important element of the design solution is the way of resting steel brackets on water insulation.

The inconvenience is the relatively large difference in height between the structural ceiling, and the usable level of the terrace located on the openwork formwork. This height makes it necessary to significantly lower the ceiling under the terrace, and thus lowering the usable height of the rooms under it.