Air Test Consultancy by CPS Leakage
Achieving compliance with Part L1A, L2A or L2B can be difficult to achieve without paying attention to detail from the outset of the build.
CPS Leakage Ltd offers air test consultancy on new build properties throughout East Anglia and for non-residential buildings in London, Kent and East Sussex, from as early as the design stage in an effort to minimize the risk of a fail on the air test day. The path of consultancy is as follows:
Architectural Drawing Design Review:
We undertake a review of Architectural & Engineering drawings. This is to identify and propose alterations to potentially problematic details within the building envelope, with regards to air leakage, and establish the air tight barrier. Our findings would be presented in a written report.
Below is an example where the junction between the deck sheet and the finishes on the external wall, will need to be sealed. A solution to this problem could involve insulation board and mastic or plasterboard and expanding foam.
Design meeting with the project team:
At an early stage of the build we attend a meeting on site with the Project Team and the Envelope Contractors. This is to discuss the findings of the Design Review and any problematic detail identified in the drawings. We may then take a site tour to inspect for difficult areas to seal. Finally, we would agree a course of action to ensure an airtight barrier for the air test on the new build is in situ.
Construction Consultancy Site Inspections:
At key stages of the build we undertake Construction Consultancy Site Inspections to ensure that the course of action, set in the previous consultancy, is complied with. We undertake to identify leakage path problems within the construction by visual inspection and present a full illustrated report proposing any actions to be undertaken. Such inspections can be performed without design-based consultancy and still provide a useful tool for minimizing the risk of a fail on the air test day.
Above is an example where proper sealing is required at the joint between the wind catcher and the roof sheet instead of rock wool stuffing. Also shown is where the corners and top of a plasterboard bulkhead will require sealing to the underside of the roof deck.
Pre-test Site Visit:
About two weeks before the actual air test we conduct a Pre-test Inspection. This involves a snagging tour of the site, with site staff, to identify any visible leakage paths and hence allow time for site to do remedial work. We can present a photographic report detailing any issues found.