At Isis Windows, we provide a stunning range of high-quality, double glazing in Oxford and across Oxfordshire. Whether you’re looking for replacement uPVC windows, sash windows or French windows, we have a wide selection in an array of designs to suit your home and personal taste. Few things define your home’s character more than windows!

All our double glazed windows come with a 10-year guarantee to give you complete peace of mind – we supply things that are designed to last making choosing a double glazing company that little bit easier. Order our replacement windows with confidence that the end result will make your home a warmer, safer, quieter and more energy-efficient place.

What’s more, our double glazing is almost maintenance-free! We work closely with some of the UK’s leading manufacturers and employ our own fully-trained, qualified and experienced fitters. Trust us to design and fit the best glazing solution for your home and reap the benefits of double glazing windows.


Take a look at our elegant line-up of styles and colours, including fashionable pastels like Cherwell Green plus some...

Sash Windows

These are ideal in conservation areas and on older homes where you’re looking to retain the period character of a property.

uPVC Timber Windows

These combine the beauty of real wood with the all-important energy-efficiency, durability and hard surface provided by uPVC.

Casement Windows

Casement windows make the ideal choice for period properties, where they’ll blend in seamlessly with the aesthetics.

French Windows

French windows add more than a hint of glamour and personality to your home. Team them up with French doors...

Flush Sash Windows

If you own a character cottage or your home is grade-listed or in a conservation area, flush sash windows make...

We’re firmly committed to environmental sustainability. So we recycle all the old uPVC windows that we take out of customers’ properties. We’ve partnered with Eurocell Recycle to do this – the UK’s biggest recycling operator, which in 2021 stopped the equivalent of three million window frames from going straight to landfill. Specifically, it’s also one of Britain’s leading recyclers of uPVC windows. The company gives us recycling certification, and we don’t charge people a penny for this service.

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We have a selection of doors to suit every home and budget.