Precision-engineered
windows & doors
A+ rated uPVC systems built to your exact specifications. Configure your perfect windows and doors with our online quote builder.
Product Ranges
Made-to-measure uPVC systems for every project
Casement Windows
Classic side-hung design with modern performance
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Flush Casement Windows
Heritage-style flush fit with contemporary efficiency
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Tilt & Turn Windows
Dual-action ventilation for maximum flexibility
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Sliding Sash Windows
Traditional vertical sliding with modern mechanics
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French Doors
Wide-opening elegance connecting inside and out
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Patio Doors
Smooth sliding access to your outdoor space
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Composite Doors
Maximum security with premium kerb appeal
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Bi-Fold Doors
Full-width openings that transform your living space
Explore rangeFeatured Systems
Our most specified window and door systems, built for performance and precision.
Casement Windows
Our most popular window system — versatile, efficient, and available in 28+ colours.
Composite Doors
Solid timber core with GRP skin for maximum security and kerb appeal.
Bi-Fold Doors
Transform your living space with full-width folding door systems.
Sliding Sash Windows
Period-appropriate vertical sliders with modern uPVC performance.
Built to your specification
Use our quote builder to configure your windows and doors to exact measurements, colours, glazing, and hardware. Get an instant estimate or request a detailed quotation.
Start ConfiguringConfigure any product in minutes
Windows, doors, colours, glazing, hardware
Choose Style
Windows, doors, bi-folds
Choose Colour
28+ frame finishes
Choose Glazing
Double, triple, acoustic
Choose Hardware
Handles, locks, hinges
Colours & Finishes
Personalise your windows and doors to match your property
Why JRT Frames
Precision manufacturing, premium materials, and straightforward service.
UK Manufacturing
Every window and door is manufactured in our Sheffield facility to precise specifications.
Custom Sizing
Made to measure as standard. No off-the-shelf compromises on fit or finish.
A+ Energy Rated
Our glazing systems exceed current building regulations for thermal efficiency.
PAS 24 Security
Multi-point locking and reinforced profiles as standard across every product range.
10-Year Guarantee
Full manufacturer's guarantee on frames, hardware, and sealed glazing units.
Survey & Support
Free technical survey service and dedicated project support from order to delivery.
How It Works
From measurement to delivery in four clear steps
Measure
Book a free survey or provide your own measurements for an accurate quotation.
Configure
Choose your style, colour, glazing, and hardware using our online configurator.
Manufacture
Your order is manufactured to spec in our UK facility with rigorous quality checks.
Deliver
Direct delivery to site within 2–4 weeks, or installation via our approved network.
Trusted by Homeowners & Trade
Real feedback from customers across the UK
“The casement windows transformed our 1930s semi. The flush finish looks period-appropriate and the draught reduction is immediately noticeable. Excellent quality.”
“Had bi-fold doors fitted across the back of the kitchen. The configurator made the whole process straightforward and delivery was ahead of schedule.”
“As a trade customer, the ordering process is efficient and the product quality is consistently high. Lead times are reliable and the team is responsive.”
“The composite front door in Anthracite Grey looks stunning. Solid, secure, and the colour hasn't faded at all after 18 months.”
“Replaced all windows with triple-glazed casements. Our energy bills dropped noticeably and the road noise reduction is remarkable.”
“The sliding sash windows are a perfect match for our Victorian terrace. Neighbours can't tell they're uPVC — that's the best compliment.”
Ready to configure your project?
Build your quote online, request a free survey, or speak directly with our product team.