CORRUGATED POLYCARBONATE SHEETS INSTALLATION

Frame dimensions for installing corrugated polycarbonate sheets depend on the imposed load and sheet thickness. See the polycarbonate sheet load-bearing capacity data table to calculate appropriate dimensions.

Longitudinal overlap: the sheets must be laid with a minimum 30 cm overlap for roofing applications. A 15 cm overlap is sufficient in walls. Longitudinal overlaps must be fixed by screws and flashing. Screws should not be fixed on the sheet directly. Therefore, flashing and double-sided rubber adhesive tapes must be used for pressure distribution. Furthermore, according to the physical structure of the sheet, foams with the same pitch as the sheet are to be placed under the screw-fixtures. The sheet should be first attached to the purlin by a special adhesive according to the pitch.
Transverse overlap: in this case, overlapping should be opposite to the general direction of the wind. Overlapping for the sinusoidal and V76 sheets is at least twice the pitch, and for the trapezoidal sheets is one pitch. In the case of the single-pitch overlap of sinusoidal and V76 sheets, the overlapping site should be tightly fixed by a belt under the sheet, a fish-bellied over the sheet, and a rubber tape between them.

Longitudinal overlap: in this case, the longitudinal overlap is at least 30 cm, and flashing and double-sided rubber adhesive tape are required at every pitch. For better sealing, it is recommended to use double-sided rubber adhesive tape between the polycarbonate sheet and sandwich panel.
Transverse overlap: flashing tape should be used on both sides of the sheet in this type of overlapping.
Due to different thicknesses of sandwich panel and corrugated sheets, a profile with the identical sheet thickness should be placed under the purlin, and then rubber foams must be attached. Instead, a piece of the sandwich panel with the same pitch (step) as the sheet can be cut and placed under the sheet. One-piece flashing should be used at every pitch.