Get your free and quick quotation today
Get a quoteStylish, secure, and energy-efficient
uPVC Casement Windows
Our uPVC casement windows provide the perfect blend of functionality and aesthetics for any home.
Designed to offer top-tier security and thermal performance, these windows ensure that your property remains safe while reducing energy consumption, leading to lower heating costs and a smaller carbon footprint.
Desirable Design
Stylish and attractive, the Liniar Casement windows are created with ultra slim sightlines, meaning improved visibility thanks to an enlarged area of glass panes in each window.
Energy Efficient
Save money on your heating bills and improve the value of your house with our uPVC casement windows. The multi-chambered Liniar profile locks the heat in and stops the cold getting through. Our double glazing achieves a WER rating of A+14, making it a brilliant thermal insulator. Because of this energy efficiency our windows achieve the highest possible BFRC window energy rating in the industry.
10 Year Warranty
All Liniar uPVC casement windows are guaranteed not to warp, split or discolour for a minimum of 10 years from the date of installation.
Exceptional Security
We want you to be safe and secure which is why we offer Sac high-security locking. Not only is it secure, but it also comes with a 10 year mechanical guarantee, as well as £2,500 insurance contribution in the unlikely event of a break-in.
Minimal Maintenance
UPVC casement windows that are built to last. They will never rot, warp or require re-paining. The only thing you need to do is lubricate the hinges once in a while to ensure the window functions at its optimal performance.
Chamfered Rebate
The design of our uPVC casement windows is enhanced with the use of chamfered detail; a flat surface created from cutting a straight edge. A desirable option for simplistic style and contemporary aesthetics.
Casement windows with high performance and sustainability in mind
Our uPVC casement windows are 100% recyclable, making them an eco-friendly choice for homeowners looking to reduce their environmental impact. They are completely lead-free, ensuring they meet both EU and UK legislation well ahead of regulatory requirements. By choosing these windows, you’re not only investing in your home’s future but also contributing to a healthier environment through the use of sustainable, eco-conscious materials.
Available in 14 colour variations for internal & external frames
Available in 6 handle & hardware finishes
Select colour
Select finish
White
Golden Oak
Smooth Anthracite
White Foil
Rosewood
Smooth Ivory
Light Grey
Irish Oak
Grained Anthracite
Cream Foil
Chartwell Green
Black Foil
Basalt Grey
Agate Grey
Chrome
White
Smoked
Silver
Gold
Black
Compare our range
Casement Window FAQs
What is a casement window?
A casement window is one that is hinged on the side and opens outward (or inward in some designs). It’s one of the most popular window types because it provides good ventilation, unobstructed glass area, and ease of operation.
What makes your uPVC casement windows energy efficient?
We use a multi-chambered Liniar frame profile that helps trap heat and reduce cold transfer.
- Our double glazing achieves a WER rating of A+14, reflecting strong thermal performance.
- The frames are fully recyclable and lead-free, aligning with eco standards.
What security features do your casement windows include?
We offer Sac high security locking systems as a standard or Yale as an option.
- The hardware comes with a 10-year mechanical guarantee, plus a £2,500 insurance contribution in case of break-in (where conditions are met).
- The window profiles and locking systems are designed to resist forced entry.
What kind of warranty is offered?
All Liniar uPVC casement windows through Double Glazing Network come with a 10-year guarantee covering warping, splitting, or discolouration.
What maintenance is required for casement windows?
Very minimal maintenance is needed. The frames will not rot, warp, or require painting.
You should periodically lubricate the hinges and moving parts to keep the operation smooth.
Are these windows eco-friendly / sustainable?
Yes. The window frames are 100% recyclable and lead-free, meeting stringent environmental standards.
Get an online quote from trusted local installers with our simple quote builder
Our easy to use tool provides you with an online quote on double glazed windows, doors or conservatories from local, trusted double glazing companies.