Inspection and supervision to ensure airv tightness for a house extension
All works will need to be inspected as construction proceeds. Once the building work is
completed it may be difficult to examine the airtightness layer as it is usually covered by internal fixtures and
Inspection is also an opportunity to ensure that the construction team has a clear understanding of the
importance of the airtightness layer and how it is to be incorporated. Inspection should concentrate on the
continuity of the air barrier, particularly parts that will be hidden on completion.
The main objective should be to ensure that there is an adequate understanding on site of the airtightness
requirements at joints, intersections and junctions of different wall, roof and floor types. Supervisory staff need
to ensure that all operatives carrying out airtightness-critical operations are aware of the significance of the
work. Any uncertainties about detailing or materials should be checked with the designer.