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

Stylish and secure patio doors from Firmfix windows, doors and conservatories

Firmfix Sliding Patio Doors Tewkesbury

Picture how your room would look with a stylish patio door letting in the light and enhancing your view.

Imagine your next party or barbecue and how a patio door can add a real sense of vitality to your event by extending your living area into your garden or patio.

With an in-line patio door your room will feel instantly brighter and uplifting, bringing the outside in, creating a whole new living experience. But it’s not just the visual appeal that sets our patio doors apart.

Superior Strength

Householders will no longer sacrifice strength and energy efficiency for the largest window in their home, the patio door. That’s why each patio door is manufactured using the highest grade materials and to the finest of tolerances to provide a tight seal that keeps the winter’s chill and summer’s heat at bay.

Superior Energy Efficiency

Our exacting manufacturing standards automatically ensure that your patio door is extremely energy efficient but in addition, our experienced sales team will be able to provide you with a number of optional glass packages specifically tailored to your house and its environment.

Superior Security

Security is a definite priority in the design of our in-line patio doors. All are fitted with our unique Ultimate Collection handle. This handle features a number of enhanced security features, including a chamfered backplate and bespoke keyhole shape which is designed to protect the cylinder.

Stylish, strong and energy efficient, our market leading patio doors will introduce a whole new lifestyle option to your home, opening up your room and merging indoor and outdoor spaces.

Hardware Options






Profile Colour Options



Foil Inside and Outside Options

Crystal White


Golden Oak

Irish Oak

Foil Outside / White Inside Options

Chartwell Green


Anthracite Grey

Golden Oak


Irish Oak

Black Brown


Two, three or four pane? Contemporary or modern? White or coloured? Whatever your taste, Firmfix have a wide range of options available to enhance any property, adding a real touch of luxury and visual appeal to your home.


We now offer an aluminium low threshold option on our sliding patio doors. Featuring a ramp on either side of the door, it’s an innovation that enables easy access for wheelchair users. Available in a choice of two colours – silver or gold.

How can we help?

Get an instant Online Quote, speak to an expert by Calling 01684 296603, or Requesting a Call Back or Brochure, or if you have a query, drop us a note in the quick contact form below

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