Flat roofs are mainly sprayed in combination with polyurethane heat insulation when we solve hydroinsulation either with a sprayed membrane on the basis of polyurethane, polyurea or polyurea-hybrid.
The materials have a higher yield strength of 300-600 %, but the disadvantage is that they are not UV-stable, therefore it is necessary to provide them with UV resistant spray. Due to the heat reflection, it is recommended to apply white sprays with the highest ability to reflect light and thus prevent unnecessary overheating of the structure.
The advantege is that polyurethane and polyurea do not age up, in comparison with bitumen materials the roof is not so loaded and they overcome cycles even at minus temperatures. It is possible to smoothly solve details, such as drains, irregularities, passages, passage to a wall etc.