40 mm of insulation in the trough of the wave and 80 mm at its highest point. For thermal calculations, a 40/80 panel is equivalent to 60 mm of insulation, and a 60/105 panel to 80 mm.

In Romane Canal, 40/80 mm (R 2.73) suits shelters, garages, covered areas and outbuildings; 60/105 mm (R 3.64) suits living spaces and converted lofts. Flat Tile 50/77 mm (R 3.12) suits homes and annexes. Details in the article Which thickness to choose?

10% (about 5.7°), for all models. Below that, call us so we can study your project.

From 2.10 m to 12.25 m, in steps of 0.35 m, to cover the rafter length in one piece. Lengths from 12.60 m to 15.75 m are possible if you find suitable transport.

Yes. The panel is cut to the size of the window and weathertightness is provided by the matching flashing kit. The steps are explained in How to fit a Velux on a sandwich panel roof.

Yes, it is one of the most common projects. Removal of the asbestos sheets must be carried out by a certified company; the panels are then installed on the existing frame if it is sound. See Replacing an asbestos-cement roof.

Verge trims on the sides, a ridge at the top, eaves closures at the bottom of the slope and fixing screws, plus valleys, hips or flashings depending on the roof, in the colour of your panels. The online quote calculates the quantities and lengths. See all accessories.

Usually 2 to 3 screws per panel and per purlin, i.e. 2 to 4 screws/m² depending on purlin spacing (2 m maximum recommended).