Classic®  by Sheerline® Aluminium Windows

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

Sheerline® Classic® Aluminium

Sheerline Aluminium Windows and Doors Logo

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

Sheerline Aluminium Windows and Doors Made in the UK
Sheerline Aluminium Windows and Doors Internal View of Modern Anthracite Grey Living Space Windows

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 Hipca 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

Sheerline Aluminium Windows and Doors Frame Styling Designs External Difference

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

Sheerline Aluminium Windows and Doors Classic Sitting Space

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

Sheerline Aluminium Windows and Doors Thermal Break


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

Sheerline Aluminium Windows and Doors Contemporary Bathroom

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

Sheerline Aluminium Windows and Doors Internal Finish

Sash Style

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

Double and Triple Glazing

Our Sheerline Classic Aluminium Windows are available in Double and Triple Glazed options

Sheerline Aluminium Windows and Doors Classic Double GlazedDouble Glazed

  • 28mm Unit
  • Integral Blinds option
  • Best performance to price
  • Typically 2.8 times better thermal performance than old double glazing, and up to 5 times better than single glazed

Sheerline Aluminium Windows and Doors Classic Triple GlazedTriple Glazed

  • 36mm Unit
  • Increase in heat retention compared to double glazed (typically 0.2u) when used in a 36mm unit (compared to 28mm)
  • Improved sound reduction compared to double glazed
  • Lead decoration if required can be applied to the centre unit, making aging from weather and cleaning a thing of the past

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Sheerline Aluminium Windows and Doors Sitting Room


Minimum and Maximum Dimensions

StyleMin WidthMin HeightMax WidthMax HeightDesign Wind Pressure
Top Hung Sash400mm350mm1300mm1255mm800 Pa - 2400 Pa
Side Hung Sash350mm400mm710mm1450mm800 Pa - 2400 Pa
Floating Mullion / French Casement (2 Sash)350mm400mm1420mm1450mm800 Pa - 2400 Pa
Fixed or Dummy Sash350mm350mm1500mm2100mm800 Pa - 2400 Pa
Single Leaf Doors600mm1750mm 1000mm 2200mm
Double Leaf Doors1200mm1750mm2000mm 2200mm

Recently installed local installations of Sheerline Aluminium Windows and Doors