SPOTLIGHT: REHAU
Rising to the challenge REHAU demonstrate their commitment to a greener future
design, so the performance and durability of thematerial has been extensively proven in the toughest commercial environments. It is the inherent strength of this materialwhich enables the systemto performas if fully reinforcedwithout any requirement for steel, thus eliminating the thermal bridges which can occur in conventionally reinforced PVC-U and through which energy can be lost. REHAU GENEO can achieve
When theWindowEnergy Ratings schemewas launched just seven years ago,most predicted that it would take the PVC-U sector until 2011 to produce a practical and affordable A rated window. Instead, REHAU was the first to achieve an A rating on a double glazed PVC-Uwindowin 2006 – just two years after the schemewas launched, demonstrating both the inherent dynamismwhich existswithin the industry and the commitment of the leadingmanufacturers like REHAU tomeet the challenges of the energy efficiency agenda.
W
hilst A ratedwindows have rapidly become a mainstreamsolution,
there is still nomandatory requirement for themin the Building Regulations – instead this requires only that awindowneeds to be rated C or above or to achieve a U-Value rating of 1.6. REHAU encourages architects and specifiers to choose the U-Value route, largely because it provides more flexibility, particularly in satisfying the requirements of the Code for Sustainable Homes, and also because themarket has movedway beyond the artificial ceiling of an A. In recentmonths, for example, REHAU has launched both a standard triple glazed windowwhich achieves a U-Value of just 0.8 and a Passivhaus certified compositewindow systemwith a U-Value closer to 0.7.
The REHAU THERMO 0.8 U-
Value window is suitable for use in homes built up to Code for Sustainable Homes Level 6 and is expected to prove popular with specifiers since, using the formula required to demonstrate compliance, it presents specifiers with a simple and cost effective route to reducing overall U-Values. The new window is based around REHAU’s standard S706 and REHAU Edge profiles combined with a triple glazed, Argon filled 44mm sealed unit. A single leg bead from REHAU’s standard range which has been used for many years with panes up to 1200mm x 2100mm, neatly accommodates the glass. REHAU THERMO is an open
out, casement window which has been fully weather tested to 600Pa, has achieved security accreditation to BS7950 and is fully certified to the 0.8 U-value at the standard size of 1230 x 1480mm. The most innovative part of the design is the new REHAU THERMO foam insert which is applied either during or post manufacture into the legs on the outer edge of the window to provide the additional thermal efficiency necessary to achieve the 0.8 U-Value target. For applications that require a
Passivhaus certifiedwindow, REHAU has developed an innovative solutionmanufactured using the RAU-FIPRO fully recyclable fibre composite material. These kinds of fibre composites are already used extensively in aircraft construction and Formula 1
ArchitectNews.co.uk | Architects Choice | 37
U-values from 1.1W/m2K when double glazed and Argon filled, which is appropriate for low energy homes, right down to 0.73W/m2K when triple glazed and Krypton filled, which meets passive solar house standards. It also achieves the highest Class 5 levels of sound insulation and up to Class 2 break in protection without steel reinforcement. REHAU GENEO windows have recently been installed in
only the third commercial office building in the UK to be fully Passivhaus certified – the new regional headquarters of Interserve Construction in
Syston, Leicestershire.
Tel: 01989 762650 Email:
enquiries@rehau.com Web:
www.rehau.co.uk
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