Building regulations / standards
International regulations and local building codes must be observed for all drainage installations. Local rainfall rates should be taken into account.
Roof outlets are not multi-purpose and products are designed for use with specific types of roof construction (e.g. cold roof, warm roof, inverted roof parapet roof and balconies).
The depth of structural slab, thickness and location of insulation and the type and location of waterproof membrane are factors to consider at the outset of any drainage selection.