For the assembly of substructures first fastenings must be installed at the appropriate grid spacings. On tiled roofs, the roof hooks are attached either directly to the rafter or to distance battens above the rafter. Roof hooks are available for almost any type of tile and are secured by means of seating bolts.
In the case of plate fold roofs, the clamps are installed directly at the fold. The clamps consist of two stainless steel metal sheets, which are bolted together. The roof fold clamps are available in a round version, especially for Kalzip roofs. The substructure can be mounted on the clamps, without disturbing the roof surface.
For the installation on a corrugated roof type, the existing screws are replaced by hanger bolts. This secures the corrugated roof, and at the same time the hanger bolts can be used for the installation of the substructure. This provides the base for the installation with a minimum of time and effort.
For flat roofs, generally Renosol plates are used. The gravel is removed from the required flat roof area, a protective mat or fleece is laid and the Renosol plate is placed on this. Then the TRI-STAND profiles UP and UP-S can be riveted directly to the Renosol plate. Finally, the Renosol plates must be weighed down again with gravel, in order to meet the static requirements.