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Conservatory with new windows and doors

GJM Windows & Doors Ltd: Your Trusted Installer

Double-Glazing Installers In Stevenage

Specialists In Windows And Doors

Double-glazing windows and doors are popular among homeowners and businesses seeking smart, energy-saving upgrades. Founded in 2022, GJM Windows & Doors Ltd is your trusted source for market-leading windows, doors, and conservatories in Stevenage. Our double-glazing installers are proficient in a variety of products, such as specialised fire exit doors, aluminium and UPVC doors and windows, roof lights, custom conservatories, warm roofs, and more. 


We are available 7 days a week for comprehensive services such as lock changes, end-of-tenancy inspections, conservatory repairs, and a 24-hour call-out service for emergency glazing and boarding up broken doors and windows. Count on us for complete customer satisfaction, first-class service, fast response, and flexible budget options with no hidden extras. 


We are associated with the Glass And Glazing Federation and accredited by CERTASS, CORGI Fenestration, Secured By Design, and Buy With Confidence. We also hold the PAS 24 Certification of Windows & Doors.


Call us on 07784 120303 for your residential and commercial needs.

Services We Offer

We supply and fit the best-performing products with A and C energy ratings for domestic structures, offices, schools, and other commercial spaces. Our goal is to ensure maximum comfort and security for your structures.

Front view of a house with black door and white windows
a roof with windows and skylights

Doors—Installations And Repairs

Are you seeking front door installation for your new build? Or do you want to extend your outdoor living space with a sleek patio and porch door? We offer a wide selection of double-glazed doors for residential and commercial applications.

Windows—Installations And Repairs

We supply, install, and repair windows in almost any traditional and modern style. From UPVC and aluminium windows to casement and replacement windows, our units ensure outstanding performance and security for your space.


5 Venables Terrace Walkern Rd,

Stevenage, SG1 3QZ

Send Us A Message

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Need New Windows Or Doors? Rely On Our Double Glazing Installers In Stevenage For Premium Products And Services. Call 07784 120303 Today!

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