Damp penetration to inside wall, plaster flaking, water marks. Problems limited to back was adjacent to kitchen extension.
Underfloor examined. Evidence of missing air brick. Outside prior air brick removed and replaced during repair work on wall by standard brick with the slate DPC not replaced meaning a huge gap in the DPC, giving a ‘funnel’ shaped damp patch rising upwards.
NOTE: Previous evidence of an injected DPC and ABSOLUTE PROOF it doesn’t work. If it did, the ‘funnel-rise’ of damp from the missing DPC would have stopped at the course above and not gone right up the wall.