The main structural profiles of VELUX Modular Skylights consist of pultruded composite, containing approximately 80% continuous fibreglass treads and 20% two-component polyurethane resin.
The composite guarantees high heat insulating performance and thermal stability as well as excellent profile shiftiness and strength. In combination, the characteristics of the VELUX composite gives the slim profiles self-supporting strength and an ability to support installations of considerable size. In addition the material is maintenance-free, non-corrosive and electrical non-conductive.
In combination with low-energy glazing units the VELUX Modular Skylights are able to achieve one of the lowest overall U-values for frame and glazing assembly within the skylight market.