Double-hungVenting upper and lower sash in a single frame that slide vertically past one another.
In contrast, exterior glazed systems allow the glass to be installed from the curtain wall’s exterior side.
Designed to fix to your upstand, the Flushglaze Fixed Rooflight has been rigorously tested and certified to many different standards including BBA.
Mercury have just completed a full refurb of my home and their products, service, communication and fitting was absolutely superb.
R-values are a measure of the thermal resistance of a material of a specific thickness, that is, its resistance to the transfer of heat across it.
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