Classic®  by Sheerline® Aluminium Windows

Revolutionary Aluminium Windows and Doors with Intelligent Design born out of experience

Classic® by Sheerline® Aluminium

4 Styles, all great British performance

Introducing Classic® by Sheerline® Aluminium

Building on years of experience, we’ve incorporated many new innovative ideas to create the Sheerline range of Window, Door and Bi-fold systems available now, and a new Lift and Slide Patio Door launch late Summer 2023. Creating warm, slim and ultra secure products, designed for discerning homeowners who aren’t willing to compromise

Built around our innovative Thermlock® multi-chamber thermal break, Sheerline windows use a patented construction method that creates the most beautiful, high quality finish possible. Stylish, safe and sustainable – and offered with unbeatable service levels – Sheerline is the right choice for homeowners

A range of Contemporary Colours

Classic windows are available in eight powder coated matt colours, as well as a high gloss white with the option of choosing a different colour for the interior to help you find the look that is perfect for your property.

Traditional Pure White

RAL 9010 Matt

Traditional Hipa Gloss White

RAL 9910 Gloss

Traditional Anthracite Grey

RAL 7016 Matt

Traditional Jet Black

RAL 9005 Matt

Character Premium Cream

RAL 9001 Matt

Character Premium Agate Grey

RAL 7038 Matt

Character Premium Squirrel Grey

RAL 7000 Matt

Character Premium Pastel Turquoise

6034 Matt

Character Premium Brown

RAL 8017 Matt

Classic®  by Sheerline® Aluminium Windows

Transform your home with our high performance aluminium windows

Designed to combine the latest technical innovations with peerless aesthetics

Choosing the right windows for your home is an important decision. An investment that makes a real difference to how warm and secure you feel; as well as changing the look of your property. This is why we have designed the Classic system from the ground up. Building on years of experience, we’ve incorporated many new innovative ideas; creating a warmer, slimmer and more secure window system. Designed for discerning homeowners that aren’t willing to compromise, our windows are tailored to those who demand more for their home. Built around an innovative

Thermlock® multi-chamber thermal break, our windows use a patented construction method that offers unsurpassed levels of security. Creating windows that are strong and durable, yet with slim frames that maximise the light flooding into your home. Sheerline aluminium windows are also available in a wide range of colours, letting you express your home’s character

Beadless Security

With unrivalled security built into the heart of every window. The innovative construction of the Classic window system eliminates the need for separate glazing beads – often an area of weakness in traditional window design. Instead our patented corner jointing method securely locks the glass away within a completely sealed unit. This coupled with our high security multipoint locking and unique hinge protectors creates unparalleled levels of security. No window in its class is as secure

All Sheerline windows carry PAS24:2016 enhanced security accreditation, so if you are looking for stylish aluminium windows with extra peace of mind as standard – then we have you covered

For added security choose our laminate glass upgrade – for Secured by Design accreditation – the official UK Police initiative ‘designing out crime’ through physical security


Thermlock® technology helps keep you and your home snug and warm. Cold, crisp lines on the outside hide away our innovative Thermlock® multi-chamber thermal design, helping keep you and your property well insulated against the worst of the UK weather

This closed-cell, insulating chamber acts as a thermal break and works in conjunction with our high performance double glazing to create class leading thermal performance, far superior to traditional polyamide thermal breaks. Sheerline’s sills also feature this same technology coupled with innovative in-built weather sealing that keep draughts and rain safely outside

Patented Construction

With great looks from every angle - due to our unique construction method. The ultra slim 59mm sightlines of the innovative Classic window system maximises the light flooding into your home, creating a refined architectural look. While our patented construction method – using threaded screws to bind corners tightly together in perfect unison – creates perfect run through mitres on internal joints, doing away with the unsightly junctions of square cut beads seen on ordinary aluminium windows

We’ve also designed out the stepping of misaligned corners, allowing each Sheerline window to be individually hand tuned to perfection. Leaving you with the perfect balance of understated refinement and exacting quality standards

Sash Style

With four styles of sash to choose from, one will be perfect for your home

Download or View the Brochures


Minimum and Maximum Dimensions

Style Min Width Min HeightMax Width  Max Height Design Wind Pressure
Top Hung Sash 400mm 350mm 1500mm 1500mm 800 Pa - 2400 Pa
Side Hung Sash 350mm 400mm 750mm 1500mm 800 Pa - 2400 Pa
Floating Mullion / French Casement (2 Sash) 800mm 400mm 1500mm 1500mm 800 Pa - 2400 Pa
 Fixed or Dummy Sash 350mm 350mm 1500mm 2100mm 800 Pa - 2400 Pa

Recently installed local installations of Sheerline Aluminium Windows and Doors


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