Business Details
21 Years
experience
Trusted Supplier of Composite & UPVC Doors & Windows
Just Doors UK has established itself as the UK's leading supplier of high-quality double glazing products, offering an extensive range of composite doors, UPVC doors, windows, and aluminium systems. With over 18 years of industry experience since 2005, we combine technical expertise with a commitment to energy efficiency and security standards. Our products feature multi-point locking systems, Pilkington K glass, and reinforced frames, ensuring compliance with Part L thermal regulations and Secured by Design principles. As a FENSA-registered company, we provide 10-year guarantees on profiles and 5-year warranties on sealed units, demonstrating our confidence in product longevity.Our team of specialists offers technical guidance for DIY installations, supported by comprehensive online resources including measurement guides and building regulation compliance information. We maintain strict quality control through partnerships with certified manufacturers, ensuring all products meet European safety glass standards (EN 12600) and U-value requirements. Our customer-centric approach includes price-matching guarantees, nationwide delivery, and dedicated support for both trade professionals and homeowners.
Services
Composite Doors
UPVC Doors
French Doors
Patio Doors
Windows
Roof Lanterns
Fire Doors
Aluminium Systems
Door Hardware
Trade Supplies
Details
- Year established: 2005
Highlights and features
- UK's top-rated double glazing supplier with 4.93/5 customer rating
- Price promise guarantee beats any online competitor's quote
- Fast 2-6 week lead times with nationwide delivery network
- 10-year product guarantees exceeding building regulation standards
- Expert technical support for DIY installations and trade customers
What people say
Great quality, service and value for money
No.1 Rated UK's top rated double glazing supplier
Fast lead times and price promise guarantee
Excellent technical support for DIY installations
Comprehensive product range with clear specifications
Services
Composite Doors
Our composite doors combine modern security features with traditional aesthetics. Manufactured with reinforced frames, multi-point locking systems, and 48mm solid timber cores, they exceed PAS 24 security standards. Available in 10+ finishes including smooth, timber, and stable door designs, these doors achieve U-values of 1.4W/mK or better while maintaining FD30 fire resistance certification. Customers benefit from 10-year colour fade guarantees and easy DIY installation with pre-fitted hardware.
UPVC Windows
We supply A+13 rated UPVC windows with advanced thermal efficiency. Our casement, tilt-and-turn, and sash designs incorporate 28mm sealed units with warm-edge spacers and argon gas fillings. All windows meet Document L1B 2022 requirements for replacement installations, featuring low-E glass coatings and trickle vents where required. Available in 12 colour options with matching or contrasting internal/external finishes, these windows reduce heat loss while maintaining acoustic insulation up to 45dB.
Fire Doors
Certified FD30 fire doors provide 30 minutes of fire resistance for both internal and external applications. Constructed with intumescent seals and fire-rated glazing where applicable, these doors comply with BS 476-22 standards. Internal versions feature smoke seals meeting Approved Document B requirements, while external models combine fire protection with Secured by Design security hardware. Available as composite or timber core options with 10-year performance guarantees.
Aluminium Systems
Our aluminium doors and windows offer slim sightlines with superior strength. Heritage-style doors achieve U-values of 1.4W/mK using thermal break technology, while bifold systems provide seamless indoor-outdoor transitions. All aluminium products meet Part Q security standards with multi-point locking and comply with Critical Locations safety glazing requirements using laminated toughened glass. Available in 15 RAL finishes with dual-colour options for enhanced design flexibility.
Trade Supplies
We provide bulk pricing and dedicated support for construction professionals. Trade customers access exclusive pricing on composite doors, windows, and aluminium systems with fast-track delivery options. Our technical team offers CPD-certified guidance on building regulation compliance, including Part L thermal calculations and FENSA documentation support. Registered trade accounts receive priority order processing, site-specific product recommendations, and marketing support to promote local installation services.
Questions
Do you offer price matching for online competitors?
Yes, our price promise guarantee will beat any verified online quote for identical products.
What delivery areas do you cover?
We deliver nationwide across England, Wales, and most UK mainland areas with some Scottish postcode restrictions.
Are your products compliant with building regulations?
All doors and windows meet current Part L thermal standards and Part Q security requirements as minimum specifications.
How do I measure for replacement windows?
Measure brick-to-brick openings at three points, deduct 10mm from final dimensions, and include cill requirements in specifications.
Do you supply trade customers?
Yes, we offer trade accounts with exclusive pricing, dedicated support, and marketing assistance for installers.
