Heave:
The upward movement of the ground beneath the foundations, often due to expansion of clay soils.
Condensation:
Occurs when moisture-laden warm indoor air contacts a colder, uninsulated thermal envelope, reverting to liquid water. It is the primary cause of black mould.
Interstitial Condensation:
Condensation that occurs invisibly within the structural layers of a wall or roof, usually due to a lack of vapour control layer (VCL).
Hygroscopic Salts:
Groundwater salts (nitrates/chlorides) deposited in masonry from historical rising damp; they actively attract moisture from the air, maintaining a damp plaster surface even after a DPC is fixed.
Fair Wear & Tear:
Expected deterioration over time through normal, reasonable use of the premises. Landlords cannot deduct deposit funds for fair wear.
EICR:
Electrical Installation Condition Report. Tests the safety of wiring and consumer units (Mandatory 5-year requirement for rentals).