An important safety measure in commercial and residential properties, a smoke ventilation window is positioned to allow toxic smoke to exit the building in the event of a fire or chemical hazard. Straightforward to install and easy to maintain, smoke ventilation windows are a sensible investment. Velux smoke ventilation options from Roofing Supplies UK are some of the best quality windows on the market. Like our other roofing products, we sell Velux smoke ventilation windows at discounted prices, providing our customers with cheap roofing materials that offer unbeatable quality and value. UK delivery for all orders of discounted roofing supplies.