Installation is possible from left to right as well as from right to left. Adhere to the covering direction once started. Never cover to the middle (Exception: penetrations). Each rhomboid roof tile 29 × 29 is fastened with a clip and a supplied PREFA 2.8/25 grooved nail. If snow guards are also laid, there is no rhomboid roof tile clip (only for rhomboid roof tiles 29 × 29!). For PREFA coverings over multiple layers of bitumen (e.g. bitumen shingles), you will need longer grooved nails, such as 2.8/40. Please state separately when ordering.
In areas particularly prone to storms, a wind load calculation is required and fastenings must be adjusted according to the calculation.
For bottom and top connections, start and end plates are required (2.22 pcs./running meter).
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