The changes to Part L of the Building Regs came info force on 15th June 2022. With lots of mixed messages across our industry, it can be difficult for fabricators and installers to be sure which compliance route best suits their business.
Should you switch existing systems to triple glazing and incur the costs and handling issue? Should you follow U-Values or WER/DSERs?
With the Future Homes Standard ahead of us, AluK has taken a proactive approach to ensure our products comply now and require only double-glazing. This will help reduce the environmental impact of our products without imposing the higher costs of using triple glazing.
Our approach has been to upgrade the thermal performance of our existing products so that they comply with the notional or limiting values set out.
As a systems house, we have no choice but to comply with the new lower U-Values. We support the aim to reduce our carbon footprint in the UK and want to play our part by ensuring our windows and doors meet the new Notional values.
It’s also important to us that we support our fabricators and you, the installer, by ensuring we meet these lower U-Values with the same products and using double glazing.
Why is this important?
Our route to meet the new regulations and support our customers has meant engineering many improvements to the internal design without changing the appearance of our systems.
Using new thermal break designs and foams, and new gaskets, our well-loved products have been modified to comfortably meet the new regulations for new build and existing dwellings.
The policing of the changes will be regulated by the local authority Building Control Bodies. It has been suggested that Building Control will manage the policing by:
Windows and doors installed into a New Build are required to be sealed with air sealing tape around the structural openings. Compressible seals or gun sealant may be used to supplement taping. Photographic evidence may be required for sign off.
Installation tolerances are to be in accordance with BS 8213-4 – Windows and Doors – Part 4: Code of practice for the survey and installation of windows and external doorsets.
Windows or Doors should be located with an overlap between the inner face of the unit and the inner face of the external leaf – for windows an overlap between 30-50mm and for doors 50mm – so that the window or door unit in contiguous with the insulation layer of the external wall.
Fully insulated and continuous cavity closer should be used, installed tight to the insulation and cavity apertures. For door units, install perimeter insulation within the threshold zone or use reinforced cavity closer.
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