How many plots being tested, Location, Plans and elevation drawings, cross sections if possible. Air permeability target, and a brief description of the property e.g does it have fireplace or a loft space
For dwellings, sufficient information is required to identify the different dwelling types and the number of each eg General Arrangement/Site Plan and Schedule (including other important details such as variation in storey height or construction method).
For buildings other than dwellings, the approximate envelope area is the key factor for quoting. It is required to establish the necessary fan arrangement. This affects the time on site and potentially the number of people. This can be calculated from drawings – floor plans AND elevations.
The testing body may also need to identify the potential aperture(s) into which test equipment is to be installed, in some circumstances this may require additional time on site, extra people or bespoke templates to be made.