A Modern Classic

The fact that we have completed the Sheerline Classic range with our new Classic heritage door shows how far the Sheerline brand has come in a short space of time, writes Garnalex CEO Roger Hartshorn.

In 2019, Garnalex launched the first Sheerline products from the Classic range. It was the culmination of years of experience, hard work, and a desire to change the aluminium industry to make it better – more reliable, stylish, secure, and sustainable.

It reflects our ability to be versatile and agile, to create design-led products that remain practical. We go above and beyond what our customers expect of us and continually challenge the aluminium industry so that it is better for all our customers across the UK.


Slim, steel look

Sheerline’s slim, steel look Classic heritage door has been designed to suite with the thermally efficient Classic aluminium window range. Featuring the signature stepped look, the doors feature a lockbox design, visible on both the interior and exterior.

They are available as either single or French doors.

The design is inspired by the Art Deco movement as well as turn of the 19th century industrial design. Ultra-slim aluminium doors are increasingly popular with style conscious homeowners.

Classic heritage doors are designed to match the rest of our stepped range. Customers can specify bi-folds and patios alongside either Classic or Prestige windows.



These doors have sightlines as slim as 60.5mm to maximise views and flood interiors with as much light as possible. In addition, they are Part L compliant as standard. We achieve this through our Thermlock thermal break system. This uses an integrated multi-chambered system, which improves thermal performance when compared to systems that use polyamide thermal breaks. It means that we can achieve high-performance U-values of 1.4 W/(m2K) with double glazing, as well as an A+ door energy rating.

This is an important feature for Sheerline’s customers and homeowners alike. This kind of commitment to energy efficiency will help the UK move towards the 2025 Future Homes Standard – a key part of the government’s strategy to reduce carbon emissions in new and existing properties.


Picture: The Sheerline Classic heritage door


Article written by Roger Hartshorn
04th November 2023


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