Amendments to UK Building Regulations

October
2010
12th

Approved Document L October 2010 Update

UK Building Regulations Amendments.

The new UK Building Regulations' have now been published and these come into effect on the 1st October 2010. The summary of these amendments are quite tough and the requirements are as follows:

Part L1A (New Build Dwellings)  
  • Area-weighted average U-value of 2.0W/m²K (2.2W/m²K 2006) for windows, doors and curtain walling
  • Therefore notional window value of 1.5W/m²K (1.8W/m²K 2006) with typical 1230mm x 1480mm window to EN14351
Part L1B (Existing Dwellings)  
  • Windows - 1.6W/m²K (2.0W/m2K 2006) or Window Energy Rating ‘C’ or above (WER ‘E’ 2006)
  • Doors - > 50% Glazed = 1.8W/m²K (Not specified in 2006)
  • or Other Doors = 1.8W/m²K (Not specified in 2006)

Note 1: The 1.2W/m²K Glass Centre Pane value is no longer a form of compliance unless the need to maintain the facade or the character of the building is required.

Note 2: Insulated cavity closers should be installed where appropriate.
Part L2A (New Build Non-Dwellings)  
  • Average 2.2W/m²K (Same as 2006)
  • Therefore notional window value of 1.8W/m²K with typical 1230mm x 1480mm window to EN14351
Part L2B (Existing Non-Dwellings)  
  • Windows = 1.8W/m²K (2.2W/m²K 2006) or Window Energy Rating ‘C’ or above (WER ‘E’ 2006)
  • Doors = > 50% Glazed = 1.8W/m²K (Not specified in 2006)
  • or Other Doors = 1.8W/m²K (Not specified in 2006)
  • Doors High Usage = 3.5W/m²K (Not specified in 2006)
  • Curtain Wall = Limit of 1.8W/m²K ( 2.2W/m²K 2006) or U limit = 0.8 (((1.2+(FOL x 0.5))x GF)

Note 1: The 1.2W/m²K Glass Centre Pane value is no longer a form of compliance unless the need to maintain the facade or the character of the building is required.

Note 2: Insulated cavity closers should be installed where appropriate.
page shaddow, 3D effect

Contact Information

  • T: 01268 681612 (Office)
  • T: 01268 695100 (Showrooms)

  • F: 01268 510058 (office)
  • E: sales@duration.co.uk
page shaddow, 3D effect rotated 180

Facebook Twitter Blogger YouTube line Blyweert authorised partner, approved fabricator of Blyweert Beaufort products Smarts Systems approved fabricator. We are the largest supplier of Smart products in the UK. We are an approved fabricator of Monarch otherwise known as Sapa We are a supplier to the Ministry of Justice British Standards Institution approved Kitemark Licence - under the Window Energy Rating Group Scheme We are featured on RIBA product selector, Royal Institute of British Architects NBSPlus Logo

©2010 - 2012 Duration Windows. We reserve the right to change specifications in keeping with our policy of product development.

curved webpage bottom