as strong as a bullRecommendation: 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.
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 FX.12 ROOF PANELS:
from 17°: installation on solid sheathing (at least 24 mm thick)
MINIMUM ROOF PITCH WITH PREFALZ:
from 3° (approx. 6%)
