No, with our PVCu casement windows we fit the trickle vents in the head of the outer frame and not the sash. When a trickle vent is specified in a casement window, we use a larger profile section for the head of the window changing it from a standard 56mm outer frame to a 78mm outer frame to incorporate the trickle vent and without compromising on the distance between the vent and your internal plaster line.
Heaton Estate, Bradford Road, Bailiff Bridge, Brighouse, West Yorkshire HD6 4BW
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