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sales@justdoorsuk.com
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Buy DIY UPVC Windows - Made to Measure Supply Only

Offering replacement made to measure double glazed upvc windows supply only direct to the trade and diy with low prices from just £65 inc VAT. Our upvc window frames are BFRC rated and approved and comply with the latest building regulations. BFRC is the UK’s National system for rating energy efficient double glazed upvc windows and doors and you can find everything you need to know about the window energy ratings (WER) on the BFRC website.

Excellent quality supply only diy upvc windows for easy installation at great prices! Buy upvc windows online and direct from the UK's leading double glazing supplier and save £100's off retail prices.

Order Your UPVC Windows Online

design and price your upvc windows online

Why Choose DIY UPVC Windows?

£50 OFF any double glazed window and a free argon upgrade on all replacement upvc windows online.

All made to measure upvc windows are internally beaded with a multipoint locking system and we use the Liniar fully sculptured window profile with a 10 year guarantee.

Our energy efficient diy upvc windows will not only enhance your house safety, security and thermal efficiency saving you £100's on heating bills, but will also improve your properties value and appearance.

white upvc windows

UPVC Casement Windows Browse our range of upvc windows. £25 off.

flush sash casement windows

Flush Sash UPVC Windows Browse our range of flush sash casement upvc windows. £25 off.

upvc sash windows

UPVC Sliding Sash Windows Browse our range of upvc vertical sliding sash windows. £25 off.

grey upvc windows

Grey UPVC Windows Browse our range of grey upvc windows. £25 off.

Made to Measure UPVC Casement Window Range

(as viewed from outside)
How many glazed window panes do you require?
{{windowwhiteexecutor.data.white.count( )}} UPVC Window Styles

UPVC Window Specification

UPVC Window Standard Specification

  • BFRC Approved A Rated UPVC Windows.
  • Locking push button window handles (chrome, gold or white).
  • External cill (85mm, 150mm or 180mm).
  • Multipoint Espag roller locking system with two stage night vent lock.
  • Fully sculptured profile.
  • Double glazed 28mm Pilkington EnergiKare energy saving glass (clear or obscure (extra cost)).
  • Black warm edge Edgetech superspacer bar between double glazed units.
  • Internally beaded for maximum security.
  • Fully compliant with the latest Building Regulations.
  • 10 year guarantee.

UPVC Window Features (Optional)

  • A+ Energy Rating (Soft coat low iron glass & EnergyPlus frame) (+10%).
  • 90 degree fire escape hinges, easy clean hinges or child restrictors for bedroom windows (From £10 per opener).
  • Trickle vents (£15 each).
  • Shootbolt locking (£15 per opener).
  • Dummy sash/vents - equal sight lines (From £35 per sash).
  • Fit pack - fixing screws, frame & glazing packers (£15).
  • Integral Georgian bars, external Astragal bars, square lead or diamond lead (price on request).

We offer a choice of decorative Georgian bars, diamond or square lead designs, Pilkington energy saving glass and window openings.

We supply A Rated upvc double glazed windows, flush sash casement windows, french windows, bow and bay windows and vertical sliding sash windows, we also offer tilt and turn windows that open inwards.

Coloured UPVC Windows

All replacement diy upvc windows are also available in a range of contemporary woodgrain colours including anthracite grey (RAL 7016), black and chartwell green. All coloured woodgrain foil finishes including light oak, rosewood and the contemporary window colours cost around 30-40% more than white upvc.

Window colour finishes offer the opportunity to personalise your coloured upvc windows to your own taste and style.

The range provides individual statement colours that instantly enhance the visual of your home from traditional grey windows and woodgrains to contemporary blacks and creams, the woodgrain colour range offers choice while still maintaining the virtually maintenance free benefits of UPVC.

white window profile
White
grey window profile
Anthracite Grey
golden oak window profile
Golden Oak
rosewood window profile
Rosewood
cream window profile
Cream
chartwell green window profile
Chartwell Green
black brown window profile
Black-Brown
whitegrain window profile
Whitegrain
WER Certificate

Window Energy Ratings, Energy Performance & Glass Information

Our state of the art upvc window system has been engineered to be capable of achieving high WER ratings and low U-values, meaning lower heating bills and higher property value. Double glazing: WER as high as A++24. U-value as low as 0.9 W/(m²-K) with triple glazing.

Window Energy Ratings & U Value Comparison

WER B A A+ A++
Thermal Transmittance (U Value) 1.6 W/m2k 1.3 W/m2k 1.3 W/m2k 0.9 W/m2k
Energy Index (kWh/m2k/year) -1.66 6.00 14.00 24.00
Solar Factor (g window) 0.75 0.44 0.47 0.40
Effective Air Leakage (L Factor) 0.00 W/m2k 0.00 W/m2k 0.00 W/m2k 0.00 W/m2k

Pilkington K Glass™ S is the latest high performance, low-emissivity soft coated product which offers excellent thermal insulation when incorporated within an Insulating Glass Unit (IGU).

It has a highly neutral appearance with optimal solar heat gain, thermal insulation and light transmission to provide the highest Window Energy Rating (WER) performance.

Pilkington K Glass™ S is a single stock, soft coated glass which can be used in annealed form or toughened, resulting in a product with the same thermal performance and neutral appearance. Once fabricated into an IGU, it can be used in windows in all types of glazing applications in new houses, conservatories and in replacement windows for existing homes.

  • Improves energy efficiency of homes.
  • Meets and exceeds the latest Building Regulations concerning energy efficiency for homes when combined in an Insulating Glass Unit with a suitable window frame.
  • Saves you money on heating bills as less energy is required to maintain a comfortable temperature.
  • Reduces unsightly internal condensation.
  • Helps windows achieve the highest Window Energy Ratings (WER) possible.

Security is of paramount importance in all our double glazing and our upvc windows are no exception and are fully accredited to meet appropriate standards and fully compliant with the latest relevant sections of the Building Regulations.

DIY upvc window prices start from just £65 inc VAT - Offering great value and cheap upvc windows online, we assure you the window quality supplied is excellent, please visit our customer reviews page and case studies. Buy online and direct from the UK's trusted and leading double glazing window supplier and save £100's.

We supply excellent quality made to measure supply only diy upvc windows for sale to the trade and diy, replacement upvc windows to the homeowner, construction sector, renovation companies and many more industries throughout the UK.

Customer Reviews & Testimonials

DIY UPVC Windows – Frequently Asked Questions

DIY UPVC windows are made to measure windows supplied directly to you without installation. This allows homeowners and trade customers to save money by arranging their own fitting. You simply enter your exact measurements online, choose your specification and we manufacture your windows to order for nationwide UK delivery.
The cost of DIY UPVC windows depends on size, style, glazing specification and colour choice. Smaller white casement windows are typically the most affordable, while larger coloured or sliding sash style windows cost more. Ordering supply only windows online can reduce costs significantly compared to fully installed window quotes.
Yes. Our DIY uPVC windows are manufactured with energy-efficient double glazing as standard and achieve strong thermal performance ratings. Low-emissivity glass, argon gas filled units and warm edge spacer bars help reduce heat loss and improve overall home energy efficiency.
Yes, you can install your own replacement windows. However, you must ensure the installation complies with UK Building Regulations. If you are not FENSA registered, you may need to notify your local authority building control to certify the work.
Measure the brick-to-brick opening width and height in three places and use the smallest measurement. Deduct approximately 10mm to allow for fitting tolerance. Accurate measuring is essential when ordering made-to-measure windows online. Please visit our how to measure upvc windows guide for further information.
We supply a full range of made-to-measure window styles including UPVC casement windows, flush casement windows, vertical sliding sash windows and tilt & turn windows. Each style can be customised with glazing options, decorative bars and colour finishes.
Our supply-only windows are available in white, anthracite grey, black, cream and a range of woodgrain foil finishes. Dual colour options are also available, allowing different colours internally and externally.
Yes. All our made-to-measure uPVC windows are manufactured to high quality standards and supplied with a product guarantee covering frames and sealed units for peace of mind.
Standard lead times are typically between 10–15 working days depending on style, size and colour choice. Bespoke finishes may require slightly longer production times.
Buying DIY windows online allows you to compare prices instantly, customise your specification and avoid high showroom overheads. Supply-only windows offer excellent value while maintaining the same quality standards as professionally installed double glazing products.
Contact us at sales@justdoorsuk.com or give us a call 01530 273365

For further information on our double glazing and lead times please contact out friendly sales and customer service team.