From £1000 per existing sash or £1500 per new window; it’s wonderful thing to have the best of both worlds available to you and your sash or casement windows.
Ventrolla can give you all the marvels of modern slim double glazing, without your windows ever looking anything other than late 17th-century splendour. With double glazing, you can replace the moving sashes in your existing sash boxes, or have complete new windows made, box frame and all.
Replacement Sashes Double Glazing Specification: Slim 14mm (4/6/4) double glazed units, Planitherm Total+ glass (outer pane) and krypton filled cavity. Centre Pane U-Value of 1.5 Wm²K and Total Window U-Value of 1.8 Wm²K
New Window Double Glazing Specification: Slim 16mm (4/8/4) double glazed units, Planitherm Total+ glass (outer pane) and krypton filled cavity. Centre Pane U-Value of 1.2 Wm²K and Total Window U-Value of 1.5 Wm²K
Draught Proofing: Our draught proofing system, the Ventrolla Perimeter Sealing System (VPSS) is fitted on all new joinery, as standard.
Energy Efficiencies: Reduced energy costs and up to 30% improvement in energy efficiency thanks to the same draught-proofing, Ventrolla Perimeter Sealing System (VPSS) used on our single pane windows
Compliance: Complies with Part L of the Building Regulations, although it's worth noting that replacement sashes (not full new windows) is outside of Building Control.