Stunning 'A' Rated double and triple glazed window systems

Here at Firmseal we supply and install stunning new windows designed to suit every type of property for both the replacement domestic home improvement and the new build market.

Window installations have been at the core of Firmseal since it’s conception in 1988, and as such has been an integral part of our product offering. Since the early days of offering only uPVC products in basic styles and colours our window offering has evolved into a wide choice of styles, colours and finishes, including contemporary aluminium offered in a choice of over 200 RAL colours. Traditional timber windows are also an important part of our product range and are hand-crafted by local craftsmen who take exceptional pride in their high quality work.

Our Sutton Veny and Bath based showrooms are open 5 days a week offering a friendly, zero-pressure environment from which our loyal customers can browse our entire product offering while enjoying a cup of delicious fresh coffee.

Our A-rated windows can reduce the energy required to heat your home, minimising your energy bills

Stunning new windows designed to suit every type of property

10 year no-quibble guarantee on all installations

From listed buildings to new build projects, our industry backed 10 year guarantee is standard on all our replacement windows, doors and conservatories. Want to find out more about our guarantee?

Professional CERTASS approved installations

The Firmseal team is experienced and trained to a high standard to install, and only use the highest quality materials to ensure your windows achieve thermal efficiency, long lasting durability and are finished to a superior standard. All Firmseal installations are CERTASS approved.

Windows – Style
Your fitter was friendly and brill at his job.
Mrs G.D. – Patio Doors, Merriott
Excellent product & better value for money than competitor brands
Mr & Mrs T – Alitherm, Yeovil
everything went smoothly from start to finish.
Mrs M – Windows, Yeovil
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