The smart solution for heritage applications
Aluminium versus Steel
Delivering improved thermal efficiency and long-life performance.
We designed and developed the Alitherm Heritage ranges specifically to meet the requirements of refurbishment and renewal projects, particularly in sensitive planning areas. Ideal for Victorian and Art Deco projects, the range of commercial and residential windows and balcony doors are already proven in a wide range of renovation, refurbishment and heritage projects across the UK.
Building on over 35 years’ design and development experience, our R&D engineers have produced a complete range of integrated door and window systems that deliver not only the aesthetics required for sensitive Victorian and Art deco refurbishment projects, but also the thermal efficiency that is demanded by developers, architects, planners and building occupiers.
Alitherm Heritage provides a modern light-weight, high-strength and cost-effective alternative to traditional steel window and door systems, offering a wide range of benefits:
Because aluminium does not rust or rot, window frames provide great longevity and can last indefinitely. This also means that the aluminium windows have the longest lifespan of any window framing material, with typical replacement periods of 40 years – compared to a typical 35 year replacement period for steel, PVC and timber.
Improved Thermal Efficiency
Modern aluminium windows are thermally-broken using polyamide, an excellent insulator which helps to insulate windows against heat loss. The thermal conductivity of polyamide is 160 times better than steel, which for a typical terraced house would provide a saving of around £95 each year in fuel costs. In addition to these energy savings, the polyamide also raises the internal temperature of a house, helping to reduce the risk of condensation.
Reduced Maintenance Maintenance for aluminium systems is simple and
straightforward, with a routine ‘wipe-clean’ all that is required to
|keep the products looking their best. With no requirement for re-painting or re-varnishing, aluminium windows and doors will never fade, deteriorate or rust, even in harsh environments, such as coastal locations, where steel windows can be particularly prone to rust, requiring regular maintenance and eventually, replacement. For example, the Sully Hospital overlooking the Bristol channel, the building’s original steel window frames became heavily corroded and covered in rust. These were then replaced with aluminium window frames with a marine grade polyester powder coating to provide long-life performance with minimal maintenance.|
Full range of hardware and colour options.
Our Alitherm Heritage ranges are all available with a full suite of hardware options, with products specifically designed to match the door and window furniture that is synonymous with Victorian and Art Deco styles – including ‘Monkey Tail’ and ‘Bulb’ options.
Case Study: Purifier House
Lime Kiln Road, Bristol BS1 5AD
70 Redcliff St, Bristol BS1 6LS
Cowley Business Park, Uxbridge
Alitherm Heritage windows, together with Smart commercial doors and ground floor framing, were installed as part of Linden Homes’ development of the Grade II listed Purifier House, situated in the heart of Bristol’s Harbourside area.
Wide range of high quality, thermally-broken window options.
Alitherm Heritage Window
Alitherm Heritage provides the ideal solution for heritage applications such as listed building renovations and large scale replica-refurbishment projects where planning constraints are to be considered.
The Alitherm Heritage window is designed to be built as a series of horizontal modules which can be stacked using horizontal couplers to form a multi-part window featuring a specially design drip bar between modules.
Single or double sash, side hung open out casements
Top hung open out casements
Tilt & turn windows
Polyamide thermal break provides enhanced thermal performance
Designed as a direct replacement for steel windows
Single or dual colour, marine quality polyester powder coat as standard
|U Value||1.5 W/m2K (using sealed unit 1.0 W/m2K)|
|Air||Class 4, 600Pa|
|Water||Class 9A, 600Pa|
|Wind||Class AE, 2400Pa|
|Glass||24mm, 28mm, 32mm & 36mm|
|BS 6375 Part 1||Resistance to Weather|
|PAS 24:2016||Enhanced Security Performance|
|Side Hung Vent Max o/a Width||700mm|
|Side Hung Vent Min o/a Width||300mm|
|Side Hung Vent Max o/a Height||1400mm|
|Maximum Vent Weight||40kg|
|Top Hung Vent Max o/a Width||1400mm|
|Top Hung Vent Max o/a Height||1300mm|
|Top Hung Vent Min o/a Height||275mm|
|Maximum Vent Weight||40kg|