46


feature


doors, windows, glazing & hardware


futureproofing windows:


what architects and developers need to know Stringent building quality standards and regulations, alongside ever-changing energy   NorDan assesses current and   


The government’s 2050 net zero target is driving significant regulatory reforms in a bid to substantially decarbonise the UK’s existing building stock and ensure new builds are designed to be zero-carbon. Energy efficiency and ventilation


have been particularly prioritised by the updated Building Regulations Part L and F. As the primary legislative tool for the control of energy consumption in buildings across the UK, Approved Document L mandates replacement windows must currently achieve a maximum U-value of 1.4 W/m2K or


a Window Energy Rating (WER) of B or higher. Meanwhile, Approved Document F sets out the mandatory standards for the provision of adequate airflow in existing and new buildings to ensure occupant health and comfort while preventing issues such as condensation. These requirements are heightening the need to implement trickle vents in window design. By providing controlled, necessary background ventilation, trickle vents enable trusted and effective air circulation in airtight UK homes, without the need


for occupant intervention. While these vents can have an impact on the window’s acoustic performance, some trickle vents deal with both ventilation provision and sound attenuation. The upcoming Future Homes Standard (FHS) will mandate stricter energy efficiency and sustainability measures to achieve net zero targets, with lower U-values of 0.8 W/m2K or under expected for new builds. Consequently, trickle vents will be mandatory and the utilisation


 


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