Glossary – our knowledge from A to Z
89 terms in A found.
airtightness
The densest component and the best thermal insulation are useless when poor workmanship or poor detailing results in a construction that is not airtight. This not only increases the U-value (rising energy costs), but the leaks trigger a chain reaction: the resulting condensation leads to mould, which leads to damage to the building fabric over the long-term.
