Wooden grate:

• It is recommended to use battens with a minimum width of 50 mm. (depending on the angle of the roof and the length of the slope).
• Counter battens should have a minimum height of 40 mm (depending on the roof slope angle and the length of the slope). Remember to adjust the dimensions of the battens to the rafter spacing
• For the substructure, we suggest using dry construction wood of class C24 or KVH.
• Counter battens are used to attach the roof foil (pre-covering foil – FWK) to the rafters. Metal roofing tile panels are attached directly to the battens.
• The optimal distance between the first and second battens should be 270 mm. The spacing of battens for panel metal roofing tiles should be 350 mm. This is due to the length of the steel roof tile module. Remember that the module length is measured according to the diagram below.

• Roofs with inclination angles lower than 15º require tight pre-covering. This allows you to achieve class 1 or 2 tightness (waterproof trouser roof or rainproof trouser roof).