Versatile design
We offer two popular profile choices: the modern Chamfered style, or traditional Ovolo frames.
uPVC Casement Windows Supplied and Fitted
uPVC casement windows are available in a wide range of styles and are a popular improvement for their security and energy performance.
They can suit any home with a range of customisation options such as Georgian bars, decorative glazing and many uPVC window frame designs. You can choose between top or side hung windows to control airflow.
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What uPVC casement windows can do
Energy saving design
Thanks to the streamlined design and components, bespoke windows offer many energy efficient features.
Exceptional home security is locked in
Our bespoke uPVC windows are able to last up to 35 years, aluminium around 45 years.
Low maintenance
Our bespoke uPVC windows offer a maintenance-free design that won't rot, crack, warp, or fade throughout their lifespan.
10 years’ product guarantees
All new windows carry a standard guarantee for 10 years on fit, function and finish.
Environmental protection
As well as offering EcoMax Glass, our bespoke uPVC windows incorporate a recycled section and are fully recyclable.
Our recent work shows what’s possible
Colours
A wide range of traditional and statement colours is available, as well as a range of authentic wood grain finishes.
White
Clotted Cream
Pearl Grey
Chartwell Green
Elephant Grey
Slate Grey
Slate Grey Grained
Basalt Grey
Anthracite Grey
Anthracite Grey Grained
Black Brown
Steel Blue
Racing Green
Ruby Red
Turner Oak
Irish Oak
Golden Oak
Rosewood
Mahogany
Walnut
Dark Oak
Glazing
Our uPVC windows come with EcoMAX Glass™, one of the most sustainable glass units on the market. You can also choose Comfort Glass for higher levels of thermal efficiency, security and noise reduction, or decorative glazing, such as stained glass, floral patterned, or modern etched glass.
Frame Options
Choose the perfect profile for your finished window
Choose from chamfered, a contemporary, straight-edged style, ovolo, a more traditional, decorative finish or flush sashes that blend with the external face of the window.
Ovolo Frame
Flush Sash Frame
Chamfered Frame
Furniture
Authentic furniture for your sliding sash windows
A range of window furniture options adds a personal touch to your windows. Choose from elegant designs for handles and window restrictors and pegs.
Furniture Handle Options
Window Handle
Monkey Tail Handle
Pear Drop Handle
Furniture Colour Options
Black Finish
Brass Finish
White Finish
Chrome Finish
Steel Finish
Additional Features
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![Window with a white cill]()
![Window with an overhead concealed vent]()
Authentic Timber Look Cill
Radlington Cills are deeper nosed cills, one at the standard 30mm height and another at a 55mm height; they are reproductions of timber cills.
Overhead Ventilation
In overhead, concealed ventilation the external trickle vent is hidden on the head of the outer frame, providing a much-improved finish.
Advice + Guidance
Useful uPVC window articles
- How to create a traditional heritage home look with UPVC windows
- Do I need planning permission for new uPVC windows?
- Sustainability in the industry: how far has glazing come?
- What are Window Energy Ratings (WER)?
- Our window heat retention technology explained!
Configurations
left hung sash fixed top
left hung top hung sash
Left hung sash
single fixed sash
fixed top bottom top hung sash
fixed centre bottom sash
single top hung sash
top hung top bottom sash
centre top hung sash
triple top hung fixed bottom
triple left right top hung sash
triple top hung fixed bottom sash
triple left hung sash
top hung sash
left top hung fixed right
top hung left top hung full right sash
top hung left right sash
left top hung left hung sash
top hung fixed bottom sash
top left right hung fixed bottom
left hung top left hung fixed right sash
left top hung fixed right sash
left top hung fixed bottom sash
top left hung fixed bottom sash
full top hung left hung sash
left right hung sash
top hung left sash
fixed top bottom top hung sash
left hung top right hung sash
left hung fixed right sash
left hung top hung sash
left hung bottom sash
left hung sash
left right top hung fixed bottom
left right hung top hung sash
triple left right top hung left right hung fixed centre sash
left right hung fixed centre sash
centre top hung left right hung sash
top hung left right fixed centre sash
triple left right hung sash
centre top hung left right hung sash
bottom left top hung sash
centre top hung sash
centre top hung left hung sash
centre top hung sash
centre left hung sash
triple centre top hung sash
4 top left right top hung fixed centre sash
4 left right top hung sash
4 left right hung fixed centre sash
4 top right left hung sash
4 centre top hung sash
Replacement uPVC casement windows
The frames are also fitted with a multi-chambered window profile, maintaining a comfortable which keeps the heat within the home and stops the cold from entering the room.
uPVC casement windows are fitted with multi-point locking systems, which secure the window frame to the pane at several points. This significantly enhances its durability and protection, preventing forced entry.
uPVC windows only need an occasional wipe down with a damp cloth to get rid of dirt. They’re able to last at least 30 years and will continue to perform and look like new over their lifespan.
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Our Order Process
- Contact Us for Expert Advice: Either through our contact form, call us at 0800 666 444, or visit a double glazing show centres near you. We’re here to guide you on planning permission, energy ratings, and the best materials for your home.
- Get Your Free Quote Fast: After we gather your window specifications, expect a no-obligation quote from us within 24 hours to help you make an informed decision.
- Efficient Installation Process: Once your order is confirmed, our smooth process begins with a detailed survey, before manufacturing, and installation of your new double glazed windows by our skilled team. A final check ensures everything meets your expectations.
10 Year Guarantee
Our Aluminium windows are crafted with the highest quality materials, ensuring they maintain their functionality for years. We stand behind our craftsmanship with a ten year guarantee, offering peace of mind and assurance in your investment. This commitment reflects our dedication to exceptional workmanship and customer satisfaction.
Check our finance options
Keyless and clueless?
Door prices, energy ratings, security features… in fact, everything you need to know to help you choose the best design for you and your home.
Doors
Breathe new life into your Hertfordshire home
Advice & Guidance
Can I paint my uPVC doors and windows?
Home Improvement Advice
Preserving character
Conservatories
Breathe new life into your home this spring
Advice & Guidance
10 questions you should always ask your window installer
Advice & Guidance
Double Vs Triple glazing – which glazing should I choose for my home?
Your Window and Door Journey with SEH BAC
Replacing your windows and doors is easy.
Choose the right windows and doors
Fill out a form online or visit one of our 10 showrooms to see our range of high-quality windows and doors up close and speak to our expert team for any advice on materials, styles, colours, energy efficiency and glazing. Once you are happy with your choice, we’ll provide you with a free no-obligation quote.
Place your order with us
When you want to go ahead with your order, the details have been approved, and we have received your order deposit, our administration team will provide your contract to a surveyor.
Your surveyor assessment
The surveyor will contact you to arrange a date that is convenient to come to your home and review the project scope, take accurate measurements and discuss any other matters that need to be considered. We will then confirm the surveyor’s assessment.
Confirm an installation date
Our installation department will contact you to arrange a date for your window and/or door installation and your products will be ordered and manufactured, using cutting-edge techniques and industry-leading materials.
You're ready for your installation
On the day, our skilled team will arrive at the agreed time to install your products, ensuring minimal disruption. They’ll explain the locking and opening systems and share maintenance tips to keep your products looking brand new. Once your installation is complete, we will contact you to confirm that everything has been finished.
FAQs
How much will new uPVC casement windows cost?
Thermally sound, industry-accredited custom-made windows must be individually priced to take into account manufacturing to size and any features you wish to specify. We offer a range of finance options to spread the cost of new windows. You can read more about what affects the price of double glazed windows on our site.
Which window material is best?
All our windows are designed for visual appeal as well as security, thermal efficiency and durability. Complete with industry-leading and highly accredited hardware, any of our award-winning replacement windows could transform your home. Read more
What colours are available for uPVC windows?
Innovation in the design and manufacture of uPVC windows has increased performance and widened style options.They're available in a variety of classic and modern colours. Read more
Which are the best windows and doors for homes by the beach?
Both uPVC and aluminium windows are suitable for properties situated near the coast. Please see our recent article for more information
Begin Your Project
Get your free quote – with no-obligation to buy. Simply fill in the online contact form below to get started:
Get inspired with our product brochures
Ready to make your dream home a reality but don’t know where to start? Find all the inspiration you need.
Download a brochure
Earn rewards when you recommend a friend
Recommend a friend and we’ll give you a free amazon voucher when that person places an order with us.
Recommend a friendMulti-award winning company
Here at SEH BAC, we’re proud to have won many prestigious awards for our products as well as our work in the community:
We’re one of the largest regional retail companies
Vetted for professionalism, competency & compliancy
What folks say about us
Astonishingly good or room for improvement, it’s all here. Thank you to all our customers old and new. We really appreciate your reviews. Really. Yes, really, really.
Our Accreditations
