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pr2124-rehau-polytec-50-passivhaus-cross-sectionREHAU Polytec 50 is an innovative aluminium clad curtain walling system designed to compete head on with aluminium offering improved strength and better thermal efficiency, without any compromise on slim sight lines or colour options.

The system was designed and developed by global polymer giant REHAU and has a high strength steel core which outperforms aluminium under load, an aluminium exterior face with slim 50mm profiles which can be powder coated in any colour, and a comfortable, ‘warm to the touch’ PVC interior.

It is also a traditional ‘Stick’ curtain walling system which uses the same profile for both transoms and mullions, making it easy to fabricate and easy to install with minimal wastage.

pr2124-per-fit-windows-has-completed-the-largest-scale-installation-yet-in-the-uk-of-rehau-polytec-50-at-bangor-universityREHAU Polytec 50 has been Passivhaus certified and boasts a Ucw value of 0.8 W/m²K, so it is popular for use in public and private sector commercial projects, and in both new build and refurbished homes where the emphasis is on energy efficiency.

It has also recently been tested and certified to the CWCT standard test methods for building envelopes so can be used in new build developments where an NHBC certificate is required.

Recent installations at the newly opened St Marys student village at Bangor University, North Wales and in the Greenlaw Court apartment building in Ealing illustrate many of its strengths.

At St Mary’s village, for example, 23 REHAU Polytec 50 screens coloured anthracite grey on the exterior and white on the interior were installed at heights of up to 11.3m in new student halls of residence built by Vinci Construction. REHAU’s system was preferred to aluminium primarily because it was more cost effective with no compromise on the aesthetics of the finished buildings, and also because of its better thermal performance and warmer internal face.
Similarly, at the high profile, eight storey 1960s Greenlaw Court, a 20m high curtain walling section in REHAU Polytec 50 was chosen to match the aesthetics of the steel section which it replaced and give the building’s residents better thermal performance with minimal requirements for maintenance.

REHAU has a UK network of fully trained fabricators and installers for the Polytec 50 curtain walling system, including commercial specialists Campbell Mason who have just begun a major project to install Polytec 50 curtain walling in new student accommodation being built at Coventry University.

REHAU Polytec 50 is on display in the REHAU Hub in the Building Centre, London; and further information for architects and specifiers, including full technical specification, is available in a 16 page brochure which can be downloaded from the REHAU website via

As part of REHAU’s extensive support package for commercial specifiers which is branded ‘REHAU KNOWHAU’, the company also offers a RIBA approved CPD on high performance curtain walling.

This examines the different curtain walling options – ladder, stick, unitised and structural glazing and explains the differences between them and the most appropriate applications for each.

It also covers the key design criteria – from material, spans and fixings to finishes, glazing and ventilation; and there is a detailed focus on the load considerations which apply when calculating curtain walling designs.

The CPD can be booked via REHAU’s website at:

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