Supplier of Made to Measure UPVC Windows. Based in the heart of the Midlands in Derbyshire and supplying throughout the UK, House of Windows provide custom made to measure external doors , UPVC windows supply only online, aluminium windows, heritage style doors and roof lanterns, together with Pilkington K S Glass™, ensuring quality UPVC windows and energy saving efficiency. For added heat assurance all of our UPVC windows supply only is filled with argon gas, offering double glazed and triple glazed windows so you can maximise further on the solar heat gain through double glazing and cut down heating costs. These three revolutionary techniques together ensure A rated replacement double glazed windows and doors every time as standard. With fast lead times and UPVC windows prices from just £95 inc VAT, you can rest assured you will receive quality double glazed windows and doors at unbelievably affordable prices along with a 5 star rated service.