Our skilled glazing technicians at Windowfix can retrofit your existing window and door frames with the very latest technology in Heat retention glass improving your existing double-glazing efficiency by up to 70%.


Using the very latest Pilkington Glass technology, this advanced double glazed unit achieves the lowest U –value to suit your existing frames. U – values as low as 0.9 - 1.0 W/m2K in double-glazing and 0.4W/m2K in triple-glazing can be achieved.


The process of retrofitting your windows with heat retention glass is very straight forward, we simply survey your windows, manufacture the new glass units and arrange an installation date. Installation can be easily carried out in one working day and we will remove and recycle your old glass units.

Benefits of Upgrading to Heat Retention Glass


• 70% more thermally efficient that standard double-glazing

• Greatly reduces your heating bills

• Improve home comfort and warmth

• No redecorating required

• Lowers your carbon footprint

• Retrofitted in one working day with no mess.

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