You do not have the required flash player (version 8 or later) installed, please download

Get Adobe Flash Player


Part L2

Airtightness is a key consideration in the latest building regulations. Read more about PART L2.

Airtightness is a key consideration in the latest building regulations. Read more about Part L2.

These Part L2 regulations updates came into effect on the 1st of October 2010. Changes in legal requirements from the 2006 version to the current 2010 version include:

Amends to exemptions from energy efficiency provisions
The exemption from the energy efficiency provisions for extensions consisting of a conservatory or porch is amended to grant the exemption only where the existing walls, windows or doors are retained, or replaced if removed, and where the heating system of the building is not extended into the conservatory or porch.

Change to the application of regulation 26
A new requirement has been introduced, where regulation 26 applies, for CO2 emission rate calculations to be carried out and given to the Building Control Body, along with a list of specifications used in the calculations, before the start of building work on the erection of a new building. This is in addition to the CO2 emission rate calculation required to be submitted after completion of the work.

Part L building regulations will be updated in April 2013.

PART L2 building regulations (PDF - 628Kb)