Should always be used with Glidevale G Range tile and slate ventilators.
It ensures that the roof underlay is cut and that there is a continuous permanent weatherproof path from the roof void to the outside without impairing the weatherproof function of the structure, in accordance with BS 5250.
Supplied seperately and snap-fits to the underside of the ventilator on site before the ventilator is installed.
To suit Glidevale G-Range Tile and Slate Ventilators
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