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Our superior range of uPVC casement windows from Liniar offer the very highest levels of security and thermal performance.


Modern Appearance


With ultra slim sight lines, clean and modern aesthetics our stylish casement windows enhance the beauty of any property.


Yale High Security Locking


Our casement windows can be supplied with Yale high security shootbolt locking.


Multi-chambered Profiles


Liniar's revolutionary range of multi-chambered Energy Plus profiles offers superior heat retention and structural rigidity.


Energy Efficient


Our state of the art window system has been engineered to be capable of achieving WERs as high as A+12 and U-values as low as 1.0 W/(m²-K).


Environmentally Friendly


Liniar casement windows are totally lead free and 100% recyclable, thereby reducing environmental damage and meeting EU and UK legislation ahead of time.


10 Year Warranty


All Liniar casement windows are guaranteed not to warp, split or discolour for a minimum of 10 years from the date of installation.

The WindowMan Dorchester - Casement Windows

Energy Plus range of six-chambered profiles as standard, achieving the highest possible BFRC Window Energy Ratings in the industry.

Yale shootbolt locking is fully compliant with Secured by Design specification and is covered by mechanical and security guarantees valid for 10 years after the date of installation.

Trojan 'Mega' egress hinge (designed for triple glazed side hung sashes) is also available, maintaining smooth and trouble free operation for the lifetime of the window.

Our casement windows carry the BS 7412 - PAS 24 Kitemark Licence 587165 for Windows Fabricators. This ensures maximum security and weatherability.

Our casement windows come 'Energy Saving Trust Recommended'.

Liniar hold a BBA accreditation for uPVC casement windows.

Features & Benefits



Sliding Sash

French Casement

Flush Sash

Sash Horn

Casement windows are the most popular style in the UK and offer typical functionality

Our sash horn windows preserve the classic look of wooden box-sash windows, maintaining the authenticity of any property

The attractive, low maintenance and thermally efficient timber alternative.

The French Casement window can allow both side opening vents to open fully

Maintain a traditional look for your home with our elegant uPVC vertical sliding sash windows.


Available Window Styles


Tilt & Turn

Bay Windows

Our revolutionary bay windows offer a number of features and benefits unrivalled in today's market place.

Clean lines and crisp detailing combined with fully integrated hardware delivers a contemporary European look.

bay windows

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