Table
Minimum roof pitch with PREFA R.16 roof tiles:
from 17°: installation on solid sheathing (at least 24 mm thick)
Minimum roof pitch with PREFA roof tiles:
Rafter length up to 7 m = from 12° (approx. 21%) rafter length between 7 and 12 m = from 14° (approx. 25%) rafter length over 12 m = from 16° (approx. 29%)
Minimum roof pitch with PREFA rhomboid roof tiles 44 × 44:
from 12°: installation on solid sheathing (at least 24 mm thick)
Minimum roof pitch with PREFA roof tiles:
From 22° (approx. 40%) installation on solid sheathing.
Minimum roof pitch with PREFA shingles:
From 25° (approx. 47%) installation on solid sheathing
Minimum roof pitch with PREFA DS.19 shingle
from 17° from 17 to 25° you need solid sheathing
Minimum roof pitch with PREFA FX.12 roof panels:
from 17°: installation on solid sheathing (at least 24 mm thick)
Minimum roof pitch with Prefalz:
from 3° (approx. 6%)
About roof pitch (Part 2)
Recommendation: plan a minimum substructure roof pitch of ≥ 7º (13%). However, the standards or specialist guidelines applicable in the respective country must also be taken into account.
