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We’ve been installing double glazing windows and replacement doors in Oxford and surrounding areas in Oxfordshire including Witney, Abingdon and Bicester since 1997 and pride ourselves on quality products with a high level of service to match.
Based in Bicester, Oxfordshire, we serve customers across a number of local counties, designing and fitting a range of quality doors and windows at competitive prices.
To ensure you get the best service, we’re accredited Fensa members and all of our installations comply with current thermal performance standards and come with a 10-year guarantee.
All installations are underwritten for 10 years by GGFi (Glass and Glazing Federation Insurance). With all of these benefits, you can be sure that our products and service standards exceed industry standards.
Our track record of excellent customer service comes from an independent Installation Quality Survey.
Why Choose Isis Windows?
Double Glazing Windows
UPVC Windows
We offer a full range of windows, from casement windows to sliding sash windows.
Sash Windows
Sash windows, or those which slide open vertically, are elegant with subtle proportions and have been a popular choice since the 18th and 19th centuries.
uPVC Doors
Whether you’re looking to replace your front door or are thinking about having a new Bi-folding door fitted to improve your home, we can help.
Composite Doors
Our composite doors are exceptionally secure, energy efficient and designed to stay looking good on the inside and out, year in and year out.
Bi-fold Doors
Our bi-folding doors come in an array of finishes and colours, including woodgrain effect, with a slim sightline and superb levels of security.
Sliding Doors
Our low maintenance, PVC sliding models are easy to close and open, and provide your home with an attractive solution and top energy ratings.
We have a wide range of windows and doors to suit your home and budget. Our Double Glazing Windows and Replacement Doors all come with a minimum of 10-years guarantee for your peace of mind
Isis – What’s in a name?
Isis is a name with a long, proud history. Its first recorded use is as Isa in 1350, while the first evidence of its modern form dates from 1577.
It was also the name of an Ancient Egyptian goddess, later worshipped by Greeks and Romans, but, in Oxford, Isis has long referred to the stretch of Thames north of Iffley Lock.
It comes from the old name for the River Thames, Tamesis, which in the Middle Ages was wrongly taken to be a combination of Thame and Isis.
Isis has long been associated with Oxford rowing. Its the name of the famous university’s reserve boat for its rowing crew, and of a student magazine first set up in 1892.
The university’s research and technology company is also called Isis, as are several other businesses and organisations keen to highlight their connections with Oxford.
We love Oxford and Oxfordshire, too, and are delighted to have our pride in our city reflected in our name.
FENSA is a government-authorised scheme that monitors building regulation compliance for replacement windows and doors. Every FENSA Approved Installer, from large national brands to small local companies, is assessed regularly by us to ensure its standards are continually maintained.
FENSA have recently just released their first TV advert!