Stinkpipes are a vent system to allow airflow into the drainage system. Stinkpipes normally penetrate through roof tiles or sheets creating a vulnerable area for leaks.
JSJ Roofing often find 3 areas of concern with stinkpipe flashings:
- Resealing – The seal between the pipe and the lead slate flashing splits, tears or is perished – allowing water entry. This area requires wire brushing and resealing with polyurethane sealant. Rubber dektites on metal roofs often require resealing over time as the silicon seal breaks down. This requires the old seal to be wire brushed clear and then resealed with polyurethane.
- Extensions – The lead flashing has insufficient cover under the course of tiles above the flashing. A flashing requires a minimal cover of 75mm lap to eliminate capillary attraction. We install a wakaflex extension flashing to maximise cover under the tiles above.
- New Flashing – Flashings located in the lap of two courses of tiles often are installed under the tiles due to the length of the flashing. The flashing then has no support and sag into the roof void. JSJ Roofing install new wakaflex flashing ensuring the flashing is supported by the course of tiles above.