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EXTERNAL ENVELOPE
ensure compliant buildings achieve a superior energy performance standard. Rigorous design and construction methods integrate the five principles of robust windows, high-quality insulation, airtightness, heat recovery ventilation, and the elimination of thermal bridges (areas in a structure that allow excessive heat transfer in or out). In 2022, Mansfield District Council commissioned four ultra-low energy homes for social housing rental with the aim of achieving Passivhaus accreditation. Mansfield council is proactive in its green agenda, with a target to halve emissions by 2030 and reach net zero by 2050. Passivhaus-certified windows must achieve U-values no greater than 0.80 W/m2
K. Liniar’s 90 mm system
was specified for the Saundby Avenue project, which went on to successfully achieve Passivhaus accreditation – the first buildings of their kind to be developed for social housing.
Noise reduction benefits of deeper PVCu profiles
Another benefit of choosing windows made using deeper PVCu profiles is that
when combined with triple-glazed units they can offer enhanced noise reduction. This is particularly beneficial for architects and specifiers developing properties in urban areas or other locations where noise pollution may be an issue. A comparable 70 mm window reduces external noise by 33 decibels (dB) compared to a triple- glazed, 90 mm frame’s 42 dB.
Preparing for a net zero future As energy-efficient housing takes centre stage and regulations continue to tighten, architects and specifiers must have access to innovative products that can help to future- proof their developments. British-designed PVCu window systems capable of meeting more stringent energy efficient standards are beginning to enter the market. Nevertheless, manufacturers must be clear about how products are achieving their energy performance so that specifiers can make well-informed decisions and choose the most cost-effective solutions for their projects.
Chris Armes is director of Liniar Design & Development
WWW.ARCHITECTSDATAFILE.CO.UK
ADF JANUARY 2024
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