Roof Preparation

For roof pitches below 10°, the surface should be fully boarded with plywood or a similar material for proper support. For roof pitches above 10°, battens should be spaced according to load requirements:

200kg/m² load – Battens spaced at 460mm centres
350kg/m² load – Battens spaced at 310mm centres

To enhance durability, it is recommended to treat all timber used in the roof’s supporting structure.

Sheet Overlapping

Side Lap: One corrugation to ensure a tight seal.
Head Lap: Minimum overlap of 150mm between sheets for waterproofing.

Fixing Instructions

Secure sheets using zinc-plated bitumen fixing nails.
Drive nails into the crown (highest part) of the sheet to prevent water ingress.
Use two parallel rows of nails along each side of the sheet.
Additional nails should be placed every third corrugation for extra stability.

Ventilation

To prevent condensation and mould, allow at least 50mm clearance from the roof apex. This gap promotes airflow from the eaves, through the batten cavity, and out at the ridge, maintaining a dry and well-ventilated roof space.

Technical Data

Length: 2000mm
Width: 950mm
Cover Width: 855mm
Weight: Approx. 2.90 kg/m²
Gross Surface Area: 1.9m²
Minimum Roof Pitch: 10°
Fire Rating: B2 (according to DIN 4102)
Colours Available: Black, Green, Red, Brown
Warranty: 15-year waterproofing guarante

Gutta: Bitumen Corrugated

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