Fasten the R.16 roof tiles with the supplied PREFA 2.8/25 grooved nails (base attachment of 3 pcs. per R.16 roof tile). 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 increased or decreased according to the calculation.
Note
In the case of additional fastenings, the prepared grains can be used.
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