25mm Polycarbonate Roof Vent Window PVC White 550mm x 750mm

White roof vent for 25mm polycarbonate sheets come pre-welded and are ready to install, simply cut out the polycarbonate, using the templates supplied with the vent, taking care not to damage the piece you are removing as this is required for the hinged lid. Then using the sealant and gaskets supplied, fit to your existing sheet. If fitting new sheets, you will find it easier to work on the ground.