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BUILDING ENVELOPE


SPONSORED FEATURE


Specifying large windows - Plan ahead to ensure success


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arge windows, shaped windows, impressive window screens - glazing can add real drama to your new build home but can be challenging to specify correctly. Here’s some advice on how to achieve the ideal balance of style and performance: More glass means increased sunlight which can be a benefit but also a problem. Strategies to ensure a comfortable ‘indoor climate’ include tinted glass, external shading, and careful positioning of windows within facades. Triple-glazing is the not the only option for an energy efficient home – high performance double glazing can also deliver excellent insulation, or combine double and triple glazing for a tailored (and more cost-effective) solution. Make sure your glazing plans meet


relevant building regulations as soon as possible, and specify compliant windows and doors for swift approval from building control – if in doubt, ask your window supplier – VELFAC for example has a team of technical sales people on hand to help you. Consult early with your builder and supplier to make sure larger windows can be delivered and installed safely, so you have time to adapt your plans if necessary.


FAIR RISING, PETERSFIELD


Construction company boss Jeremy Westcott was certain VELFAC composite glazing would be the perfect choice for his stunning new-build family home: ‘A significant part of my business is the approved installation of VELFAC glazing, so I knew it was a great product,’ he says. ‘I really like the slim- line frame as it delivers a larger area of glass and is ideally suited to contemporary architecture,’ he explains. ‘The system is also tried and tested – it’s a very solid product which functions extremely well.’ Designed by architect Carl Leroy Smith, Fair Rising is located on the edge of the South Downs National Park. The front elevation features full height glazed facades which rise into the distinctive double pitched roof. The windows bring maximum light – and


72 www.sbhonline.co.uk


beautiful views – into living and dining areas, and into first floor bedrooms which also feature VELFAC glazed sliding doors opening onto balconies. At the rear, an impressive, full-width VELFAC bi-fold door links the kitchen to a courtyard paved with local stone, with an additional balcony above. Both internal timber and external aluminium frames have been painted black which, says Jeremy, ‘is a definite style statement. It also gives greater emphasis to the internal frame while externally the black frame blends into the glass facade’.


MITIGATING SOLAR GAIN Jeremy and Carl actively mitigated the impact of unwanted solar gain by specifying manually opening VELFAC units, motorised VELUX roof windows, and an MHVR system which together maintain good air circulation. The glazing is also set back 1200mm into the facade to gain extra shade from the extended timber-framed eaves and walls, and also from the first floor balconies. Working with VELFAC experts,


Jeremy could meet thermal targets and building regulations with a combination of triple and double glazed units: ‘As new build homes have to be both energy efficient and satisfy the latest security standards, we installed triple


glazing at ground level and double glazing above, both of which are Secured by Design approved and offer excellent U-values. As a result our heating bills are low, despite the vaulted ceilings, and acoustic insulation is very impressive.’ Installing so many large windows did present some significant technical challenges, but Jeremy drew on his own expertise to ensure all went smoothly: ‘To install the upper windows at Fair Rising, for example, we had to construct a first- floor loading bay within the scaffolding, and use a crane to lift the units into position. This shows the importance of careful planning when installing large glazed units in order to minimise risk to people and to protect the product.’ Fair Rising proved to be such a successful project that Jeremy has used it as a showroom for clients interested in the VELFAC system: ‘The house is very enjoyable to live in,’ he says, ‘and as a result I will continue to specify VELFAC glazing, and recommend the system to my clients.’


Our experts can help you specify the ideal windows and doors for your next project - call or visit our website for more information and a no obligation quote.


01536 313 552 VELFAC.co.uk


issue 02 2021


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