England & Wales Building Regulations: Part L: Conservation of fuel and power - Party wall thermal bypass (Version 1)
In This Series
- 9 million tramping feet on a hardwood floor
- Solid rectangular column factors (sawn sections) loads at unit stress
- solid rectangular column factors (planed sections) April 1962
- solid rectangular beam factors (sawn sections) uniformly distributed loads at unit stress (continued) - April 1962
- solid rectangular beam factors (planed sections) uniformly distributed loads at unit stress - April 1962
Approved Document L (ADL) 2010 is scheduled to come into effect in England and Wales in October 2010. There has been a number of changes throughout the document, ranging from improved backstop U-values, a requirement to increase the amount of air tightness testing and an overall improvement in the dwelling emission rate. All of these changes or improvements represent a significant increase from the 2006 requirements.
Prior to the 2006 edition of Part L, the thermal performance of a party wall was assumed to be 'perfect' (with a U-Value of 0.0 W/mÂ²K) based on the fact that both sides are within the heated envelope of a building so there should be no temperate differential from one side to another.
One of the key changes to ADL2010 is that party walls must now be assigned a U-Value based on certain criteria, and that this U-Value is used in SAP calculations to determine a building's CO2 emissions.
This Construction Briefing discusses why the changes to Part L were necessary and what potential consequences for timber frame construction could be.
- The requirement
- Table 1 - Approved Document L 2010 U-values for party walls
- Effective edge sealing
- Cavity insulation
Through experimental analysis, James Norman, Joel Ross, Robbie Kirkbride and Toby Hill-Smith outline the damping exhibited in these complex beams.
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