Simply increasing the thickness of glazing and/or door slabs will not be enough to meet the 2013 Building Regulations, states Nigel Wood, Business development manager at SFS intec.
“In order to meet and future proof against the new requirements, the fenestration industry will need to work together to produce complete door and window sets, with products that work in harmony with each other.
“When the 2008 Climate Change Act legislated for a reduction in carbon emissions, it was apparent that the targeted 34% reduction by 2020 and the long term goal of -80% reductions by 2050, would require small steps throughout the construction industry, to make these targets realistic and achievable.
“Next year’s proposed changes to the regulations will require U-Values of doors and windows to decrease, in order to breed more energy efficient buildings. Doors must reduce their U-Value from the current 1.8 to 1.4 W/m2K and windows from 1.6 to 1.4 W/m2K. And with U-Values of glazing also expected to be reduced from 2.0 to 1.6 W/m2K, fabricators are already planning large measures to achieve these new requirements.
“The industry’s response to increased glazing or thicker door slabs is definitely a step in the right direction for improving energy efficiency ratings. But the implications on the entire door set and its components, including the hinges, locks and frame, must be considered.
“For example, as the amount of glazing, PVC-U, wood or aluminium increases, so will the weight of the full door set, causing potential added stress and strain on the hinge as the door pivots. Therefore, to prevent the hinge buckling or dropping under the extra weight, resulting in an unsafe and non-compliant door, fabricators and installers should work with component manufacturers to specify an appropriate solution.
“A simple Flag hinge for instance, is already pushed to its technical limits in holding the weight of double glazed doors. Increased loads from triple glazing will mean that they lack the additional stability and strength provided by a Dynamic hinge with its double pin design. Installers should specify hinges that are capable of carrying this extra load for the expected lifetime of the door - SFS intec cycle test’s all products 200,000 times - while at the same time, are still capable of exceeding the requirements of PAS 024, in order to produce a truly future proof door set.”
Nigel Wood, Business Development Manager at SFS intec: 0113 2085 500