Building Regulations Part L
Part L2 of the Building Regulations (conservation of fuel and power) was been amended in April 2006 to include a test for air leakage. Buildings with a gross floor area of greater than 500m2 require an air leakage test to be carried out in accordance with ATTMA technical standard 1 (2006) and must be shown to leak no more than 10m3/hr/m2 @ 50Pa or less than the figure given in the SAPS calculations
The amendment was introduced as a legal requirement to improve the energy efficiency of buildings. Improved efficiency has a number of benefits, both financially and environmentally. Lower energy bills cutting costs, improved working conditions promoting increased productivity and a contribution to the reduction in carbon emissions.
Interseal UK understand the air sealing requirements that arise from the great variety of materials and interface details that combine to form the modern structure and partner clients from initial advise through to onsite sealing works and testing of the building envelope, including provision of attendant technicians on the day of testing.
Integrity Test Standards
Where a gaseous extinguishing system is installed an integrity testing method is generally employed to assist in establishing the room’s total leakage - without discharging the agent
Agent retention is important to ensure the fire remains extinguished fully.
Standards now dictate that minimum retention times are between 10 and 20 minutes, dependent upon the system installed.
Should the required retention times not be achieved it may be necessary to seal the enclosure; this will require an on site survey to establish the points of leakage.
Leakage will generally be found within the ceiling and floor voids, wall construction, porous materials, soffit construction, doorways and windows etc.
Works should be in accordance with BS/150 14520 PART 1.2000 (E).
We at Interseal UK have considerable experience in locating and sealing room leakage to a first time pass standard and have a dedicated team within our workforce trained to work within your room environments.
We also offer a consultancy service to assist in achieving enclosure sealing to a pass standard.
We would recommend that a company, who are affiliated to the BFPSA, be contracted to undertake a fully independent computerised test, in order to confirm that the air sealing has been completed to the required standard, which we can arrange.