Quality flat roof insulation should not only meet the requirements for thermal protection of buildings set by standards but, above all, ensure the long lifespan of structures with minimal impact on the environment and maximum energy savings. In this regard, the excellent properties of stone wool cannot be overlooked. The global manufacturer of stone wool insulation, ROCKWOOL, substantiates this claim with many years of experience and references from several significant buildings in the Czech Republic and throughout Europe. It offers solutions in the form of two-layer insulation boards manufactured using Dual Density technology. For flat roof insulation, the patented two-layer insulation board Monrock MAX E is unequivocally recommended.