One set of sound tests needs to be undertaken for every ten flats or houses, provided the construction system is the same. A set means that the test should include two locations where the party element (wall or floor) is tested.
This is equivalent to two individual sound tests when assessing the performance of a wall (airborne performance only) and four individual tests when assessing a floor (two airborne and two impact tests). All tests must be undertaken between habitable spaces (e.g. bedrooms, living rooms) and not to or from common spaces such as stairwells and corridors.
Approved Document E 2003 states that a minimum of 10% of all party walls and floors is sound tested for every construction group or sub-group. This means that where variations in the construction may occur then further testing may be required.
- Houses: a set of tests would usually comprise of two airborne sound insulation tests of a pair of separating walls
- Flats:a set of tests would usually comprise of two airborne sound insulation tests on separating walls; two airborne sound insulation tests of separating floors and two impact sound transmission tests of separating floors
- Rooms for Residential Purposes: (student residences, hotel rooms & care homes) a set of tests would usually comprise of one airborne sound insulation test of a separating wall; one airborne sound insulation test of a separating floor and one impact sound transmission test of a separating floor