Jan 2025 - 2024 in Airtightness, brief overview
Just for interest: the best and worst tests of the year in 2024
| Best Air Permeability test | Worst Air Permeability tested New build |
Worst Air Permeability tested Existing |
|
| 1 | 0.309 - timber frame single home | 6.91 - new school extension. Would normally have been expected to be less than 5 m3/hr.m2. This was further worked and retested to the standard required. | 16.348 - existing former 1800's military building in use as office |
| 2 | 0.382 - timber frame single home | 6.54 - new house - 3 storey semi-detached. In fact, a line of these were over 5 m3/hr.m2 and needed attention on the day by the builder to get them to the required level. | 13.634 - 1990's house, occupants cold |
| 3 | 0.444 - timber frame single home | 5.83 - terraced new house.
Timber frame house where most of the rest were doing fine, but this one wasn't as good as it's peers.. |
12.598 - 1900's house, recently renovated, test prior to re-occupation. This house had further works done after this poor test and eventually came in just under 5 m3/hr.m2, on the 3rd test. |
Two of the three best results are all from the same timber frame supplier this year, as they have been for a number of years, and the one that was not of that builder is from the same builder who several years ago had a sub - 0.1ach test with us.
By the way, where the test is over the allowed limit, there is typically a retest on another day, following rectification works. We do not report on that here.
