For roofs with continuous sheets and no end laps the
minimum roof pitch is 2° (1 in 30). To prevent ponding
from occurring this minimum pitch must be adhered to
at all points of the roof. For roofs with end laps the
minimum lap is 200mm for pitches between 2° and 15°
and 150mm above 15°. For walls allow maximum end laps
of 100mm.