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Firmfix quality BSi kitemarks for manufacture and installation of windows, doors & conservatories

Double Glazing Gloucester, Cheltenham, Tewkesbury & Gloucestershire

Manufacturers and installers of quality PVCu Windows, Doors, Standard and Solid Tiled roof Conservatories, Porches, Garage Doors, Roofline, Orangeries, triple and double glazing throughout Tewkesbury, Evesham, Hereford, Worcester, Cheltenham & Gloucester.

High quality PVCu, Timber and Aluminium Windows from Firmfix

High quality PVCu, Timber & Aluminuim windows, manufactured and installed to BSi standards in a range of styles and colours.

High quality PVCu, Timber and Aluminium doors from Firmfix

Manufacturers and installers of a wide range of Doors, including Residential Doors & Composite Doors all to the highest BSi Standards

BSI Standard Conservatories from Firmfix in all shapes and sizes

We take care of everything from start to finish. From planning through design and fabrication to installation. High quality & energy efficiency.

Orangeries to the highest standard from Firmfix

Beautiful glazed extensions to your home, giving more energy efficient space with plenty of natural light for everyday use in all seasons


Trust Firmfix!

Firmfix is a well established family run business based in Tewkesbury, we manufacture supply and install top quality double glazing in Gloucestershire, Worcestershire and further afield. So if you want a Conservatory in Cheltenham a porch in Pershore, windows in Worcester or double glazing in Gloucester we are the company to call . If you have a property in Evesham or Hereford that needs new PVCu windows, doors, a conservatory an orangery or skypod orangery, Facia, guttering or new Garage doors we have it all and more. These will all make lovely additons to any home. We are an ISO 9001 registered company and hold five British Standard Kitemarks. Firmfix are proud to be a Double Glazing Tewkesbury company and founding member of the Double Glazing and Conservatory Ombudsmen Scheme which gives you the best possible consumer protection. We pride ourselves on being different to our competition.


Again, unlike most of our competition, all of our fitters are NVQ level 2 trained. They also are salary paid and not paid a percentage of the contract value or so much per frame. This ensures that your job is fitted correctly and not rushed by money motivated fitters. Our highly experienced fitters are paid a monthly wage and Perfection Bonus to encourage quality fitting every time.


All Firmfix products are guaranteed for 10 years. Should any remedial work need to be carried out, we have our own dedicated service engineer to help. Simply Contact Us for more details of how your guarantee is set up.

Salary Paid Professional Sales Staff.

Our sales staff are not paid a commission; they are salary paid which means that no pressure or sales tricks will be used to make a sale. They will not use dirty tactics against our competition as we believe our high-quality PVCu products and services speak for themselves.


At Firmfix, we manufacture our own PVCu windows and doors to stringent British Standards. Our experienced fully employed fabricators are NVQ level 2 trained producing quality frames time and time again.

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