- Your Trusted Partner for Top-Quality Windows and Door
Replace your old windows with secure, energy-efficient uPVC windows manufactured to your exact measurements. Whether you are a homeowner managing your own renovation, a DIY customer working with a local fitter or a trade professional ordering for a project, WindoorUK makes it easier to design, price and buy replacement uPVC windows online.
Our made-to-measure uPVC window prices start from only £112 including VAT. Choose a window configuration, enter your required width and height and see the price update instantly as you change the size, colour, glazing, handles and optional upgrades.
Our standard uPVC casement windows use the 70mm Deceuninck Heritage 2800 sculptured profile with energy-efficient double glazing, multipoint locking and internal glazing beads. Qualifying configurations can achieve A+ Window Energy Rating and whole-window U-values as low as 1.2 W/m²K.
We deliver supply-only windows across most mainland UK postcodes. Installation can also be arranged in selected areas after we check your postcode and confirm that a suitable local installer is available.
Explore uPVC Standard Casement WindowsEnter the measurements required for your individual window design. Every product page shows the available width and height limits for that specific configuration.
Our prices include VAT and update online as you customise your window. The final cost depends on the size, opening arrangement, colour and selected upgrades.
Order your windows for delivery and arrange your own fitter, or provide your postcode so we can check whether installation is available in your area.
Our standard specification combines energy-efficient double glazing with multipoint locking and internally glazed frames.
We deliver to most mainland UK postcodes, with standard delivery charges starting from approximately £36.
Ordering replacement windows yourself can reduce unnecessary costs and give you more control over the final specification. However, it must still be easy to select the right design, understand what is included and calculate the complete cost.
WindoorUK has structured its online uPVC window range around the needs of homeowners, DIY renovators, builders and independent installers.
You do not need to submit a form and wait several days simply to receive a basic window price. Select a design, enter your measurements and see the price update online.
The configurator also shows how upgrades affect the total cost. This makes it easier to compare Smooth White with woodgrain colours, standard glass with specialist glazing or standard handles with decorative hardware before making a decision.
Our standard casement collection includes fixed panes, side-hung openers, top-hung fanlights and multi-section window arrangements.
Instead of forcing every customer into one generic design, we provide separate products for different frame divisions and opening configurations. You can select the design that most closely matches your existing window or planned replacement.
Each product has its own permitted width and height range. The online designer only accepts measurements suitable for the selected configuration.
This is particularly useful for replacement window projects because the size limits of a single fixed window will differ from those of a three-section window with several opening sashes.
You can select more than the frame size. Depending on the chosen product, available options can include:
This allows you to order a replacement window that suits the appearance and practical requirements of your property.
You can order on a supply-only basis and use their preferred local window fitter.
Where installation is required, send us the full postcode for the property. We will check whether one of our available local installers covers the area and provide the installation cost separately.
Where installation is unavailable, you can still purchase the windows from us. We can also explain what type of local window fitter or glazing installer to search for.
Measurements, opening directions and cill requirements must be checked carefully before ordering. Our team can explain the available product options and help you understand the information required by your installer.
The final manufacturing dimensions remain the customer’s or installer’s responsibility, so any uncertainty should be resolved before placing the order.
Our standard uPVC casement windows form the main product collection on this page. Casement windows use outward-opening sashes attached to the side or top of the frame and remain one of the most practical choices for replacement window projects.
Choose the product that matches the number of panes, frame divisions and opening sashes required. You can then enter your measurements and customise the individual window.
Products are displayed in Smooth White as the standard starting finish. Other internal and external colour combinations can be selected within the window designer.
Prices start from £112 including VAT for the smallest qualifying window with:
Our standard casement range uses the Deceuninck Heritage 2800 system.
This 70mm uPVC profile has gently curved, sculptured contours rather than a sharp angular finish. The opening sash sits slightly forward from the outer frame, creating the familiar appearance associated with traditional outward-opening casement windows.
The multi-chamber frame design improves thermal efficiency while providing the structural base for the glass, reinforcement, locking system and weather seals.
Clear energy-efficient double glazing is included in the standard window specification.
The sealed glass unit uses low-emissivity glass designed to reflect heat back towards the interior of the property. The cavity is typically filled with argon gas to reduce heat transfer between the inner and outer panes.
A warm-edge spacer bar also helps reduce cold bridging around the perimeter of the glass.
Standard opening sashes include a secure multipoint locking system.
Rather than locking at one position, the mechanism secures the sash at several points around the frame. This improves compression against the weather seals while providing greater resistance against forced opening.
Qualifying configurations can also be supplied to an enhanced PAS 24 security specification.
The glazing beads that hold the sealed glass unit in position sit on the room-facing side of the window.
This means the glazing cannot be removed simply by taking out the beads from outside the property.
A white locking Connoisseur-style handle is included with a standard Smooth White window.
Alternative handle colours and decorative styles can be selected as optional upgrades.
Standard opening sashes use stainless steel friction hinges that hold the sash at the selected opening position.
Easy-clean, restricted-opening and fire-escape hinge options are also available for suitable window configurations.
The frame and opening sash include weather-resistant seals designed to reduce draughts, air leakage and water penetration when the window is correctly manufactured and installed.
Depending on the complete size and configuration, qualifying windows can achieve:
The exact result depends on the ratio of frame to glass, the number of opening sashes and the final glazing specification.
The Deceuninck uPVC profile is supplied with a ten-year profile guarantee, subject to the applicable terms, correct installation and appropriate maintenance.
The profile guarantee does not currently provide the same ten-year cover for the sealed glass units, handles, hinges or other hardware components.
Smooth White is the standard frame finish, but customers can select from approximately 26 internal and external colour combinations.
Options include:
Several finishes are available as a coloured exterior with Smooth White or Heritage White inside. Matching colours can also be selected on both sides for qualifying finishes.
Bespoke RAL colours and additional smooth or woodgrain finishes can be requested separately.
Choose from standard inline locking handles or more traditional designs such as:
Available finishes can include white, black, chrome, gold, graphite and antique-style metal tones.
An external cill directs water away from the wall below the window.
Available sizes include:
The correct selection depends on the depth of the reveal and the required projection beyond the external wall finish.
Trickle vents provide background airflow while the main window remains closed.
Available options include standard through-frame vents and more discreet ventilator arrangements for compatible designs. Colour-matched or foiled covers can also be selected to blend with the frame finish.
The required ventilation specification should be confirmed with the installer or building-control professional responsible for the project.
Easy clean hinges move the opening sash away from the side of the frame, creating additional space to access the outside surface of the glass from inside the property.
These are particularly helpful for upper-floor windows where external cleaning access is limited.
Fire-escape or egress hinges increase the clear opening available through a suitable side-hung sash.
The window size, opening dimensions and room requirements must all be checked before relying on a window as an emergency escape opening.
Restricted hinges or safety restrictors limit how far the sash can initially open.
They may be useful in children’s bedrooms, upper-floor rooms and other positions where a fully open window could create a safety risk.
Patterned glazing allows natural light to enter while reducing visibility through the window.
Available designs include:
Different privacy levels are available depending on the selected pattern.
Acoustic laminated glass can help reduce the transmission of external sound through the glazed area.
It may be suitable for properties near busy roads, railways or other sources of regular noise. The level of improvement depends on the complete glass build-up, window size, frame specification and quality of installation.
Toughened and laminated options are available where safety or additional security is required.
Toughened glass is designed to break into smaller particles, while laminated glass contains an interlayer that helps hold the glass together after impact.
The required safety-glass locations should be confirmed before ordering.
Integral blinds sit inside the sealed glass unit rather than on the room-facing surface of the window.
They provide adjustable privacy and light control without exposed cords or blinds that require regular dusting. Availability depends on the selected window and glass specification.
Decorative glazing details can help replacement windows complement the original character of the property.
Available options include:
Internal bars sit between the panes of glass, while external bars create a more pronounced surface detail.
Equal sightlines create more consistent visible frame widths across fixed and opening sections.
This can involve the use of dummy sashes to balance the appearance of the complete window. Unequal sightlines can provide a larger glass area and may reduce the overall cost.
Qualifying window configurations can achieve an A+ BFRC Window Energy Rating. The rating considers several performance factors, including: Heat passing through the window Useful solar energy entering through the glass Air leakage around the complete window This means an energy rating provides a broader assessment than looking at the U-value alone.
A U-value measures the rate at which heat passes through a building component. A lower U-value indicates lower heat transfer. Depending on the size, glass specification and opening configuration, our complete uPVC windows can achieve U-values as low as 1.2 W/m²K. A large fixed-glazed window may not produce exactly the same result as a smaller window containing several opening sashes because the ratio of frame to glass changes.
The low-emissivity coating reflects heat towards the warmer side of the glass. During colder weather, this helps retain internally generated warmth while continuing to allow natural daylight through the window. Glass is sourced from established manufacturers such as Pilkington or Saint-Gobain according to the selected specification and availability.
The cavity inside the sealed glass unit is typically filled with approximately 90% argon gas. Argon conducts heat less readily than normal air, helping improve the insulating performance of the double-glazed unit.
High-performance spacer systems such as Swisspacer or Superspacer separate the panes around the perimeter of the sealed unit. They reduce cold bridging at the edge of the glass and help support a warmer internal surface temperature around the glazing perimeter.
The Deceuninck Heritage 2800 profile uses a multi-chamber internal construction. The separate chambers interrupt the direct path through which heat can move across the frame. They also provide sections for reinforcement, drainage and hardware positioning.
Our standard uPVC casement range focuses on high-performance double glazing rather than triple glazing. This allows us to provide strong energy performance while controlling the overall glass weight, hardware requirements and product cost. The exact suitability should always be assessed against the requirements of the individual property.
Made-to-measure uPVC window prices start from £112 including VAT.
This starting price applies to the smallest qualifying Smooth White window with clear energy-efficient double glazing, standard white hardware and the standard security specification.
The final price depends on:
The live online price allows DIY customers and trade buyers to understand how each selection affects the total before ordering.
Choosing supply-only windows can also allow you to obtain separate fitting quotations from local installers rather than combining the product and installation into one fixed package.
Accurate measurements are essential because every window is manufactured for the dimensions submitted with the order.
Measure the opening at the top, middle and bottom for the width, and at the left, centre and right for the height. Record the smallest measurement in each direction and check whether the opening is reasonably square.
You must also consider:
Do not assume that the brick opening and manufacturing size are identical. Follow our measuring guide or ask the installer responsible for fitting the window to confirm the final manufacturing dimensions.
WindoorUK supplies made-to-measure windows directly to you across mainland UK. This is suitable for homeowners who already have an installer, builders completing a wider project, window fitters and trade customers.
Installation may also be arranged in selected areas through available local installers. Enter the full installation postcode when making your enquiry. We will check whether a suitable installer covers the location and provide a separate fitting cost where installation is available.
If we cannot provide installation in the requested area, you can still order the windows on a supply-only basis. Our team can also guide you on the type of local window installer or glazing company to look for.
Installation availability should always be confirmed before ordering if fitting is required.
Standard Smooth White uPVC windows normally take approximately two to three weeks to manufacture after the order and cleared payment have been received.
Standard woodgrain, special woodgrain, bespoke RAL and specialist smooth finishes normally require approximately four to six weeks. Lead times remain estimates and can change according to the selected specification, manufacturing capacity and material availability.
Delivery is available across most mainland UK postcodes.
Standard delivery costs approximately £36 for many covered postcodes. More distant destinations may carry a delivery charge of approximately £112, while a limited number of inaccessible or unsupported postcodes may be excluded.
Enter the delivery postcode during the ordering or quotation process so we can confirm:
Do not arrange an installer until the delivery date has been confirmed.
The Deceuninck uPVC profile is supplied with a ten-year profile guarantee, subject to the applicable terms and correct use, installation and maintenance.
This guarantee applies to the profile itself. It does not currently provide a separate ten-year guarantee for the sealed glass units, handles, hinges or other hardware.
You should inspect the products when they arrive and report any visible delivery damage within the period stated in the delivery and returns terms.
Yes. Each window is manufactured according to the dimensions and configuration selected for the order. The available minimum and maximum dimensions depend on the individual design.
Yes. Standard uPVC casement windows are supplied with energy-efficient double glazing. Additional privacy, acoustic, safety and decorative glass options are available for compatible configurations.
Our standard sculptured uPVC casement windows use the 70mm Deceuninck Heritage 2800 profile system.
Depending on the size, configuration and glazing specification, whole-window U-values can reach as low as 1.2 W/m²K.
Qualifying configurations are available with A+ BFRC-rated performance. The applicable energy rating depends on the complete manufactured specification rather than the glass or profile alone.
PAS 24 security specifications are available for qualifying configurations. Contact us before ordering when PAS 24 certification is required for a project.
The range includes Smooth White, White Woodgrain, Chartwell Green, Irish Oak, Golden Oak, Rosewood, Nut Tree, Anthracite Grey, Black Ash, Classic Cream, Agate Grey, Heritage White and English Oak combinations. Bespoke RAL and specialist finishes may also be requested.
Yes. Several dual-colour combinations pair a coloured or woodgrain exterior with Smooth White or Heritage White inside. Matching finishes on both sides are also available for selected colours.
Installation may be arranged in selected areas through available local installers. Provide the full installation postcode so we can check coverage. Where fitting is unavailable, the windows can still be ordered on a supply-only basis.
Smooth White windows normally take approximately two to three weeks. Standard and special colour finishes normally take approximately four to six weeks after cleared payment, subject to specification and current production capacity.
Delivery costs approximately £36 for many mainland UK postcodes. Some distant areas cost approximately £112, and a limited number of postcodes may be excluded. The exact charge is confirmed from the delivery postcode.
Prices start from £112 including VAT for the smallest qualifying Smooth White configuration with clear double glazing and standard hardware. The live price changes with the size and selected options.
Yes. Builders, installers, developers and other trade customers can order made-to-measure windows. Contact us for assistance with larger schedules or configurations not available through the online designer.
Choose a standard casement design, enter your measurements and customise the frame, glass and hardware to suit your project. Our online designer will calculate the price as you make your selections.
Need installation or help choosing the correct specification? Send us the delivery and installation postcode with your project details, and we will check the available options before you order.
