To ensure the drainage system is compatible with the Sika-Trocal roofing systems, and provides effective drainage, high quality injection moulded gravity fed rainwater outlets and scuppers can be used. 

Where Sika-Trocal rainwater outlets are used the membrane is simply welded to the injection moulded flange incorporated into the body.

Roofs that are drained internally, that is when there is a parapet all the way around the roof perimeter, should incorporate some sort of over flow provision to at least give warning and relief in the event of the normal outlets becoming blocked. This can be achieved by using the purpose made Sika-Trocal Warning Pipe/ Scuppers.

Sika-Trocal Products: