Brown marks on a shop's ceiling tiles
The property
A town centre shop with a one-bedroom flat above, reached by its own door. The flat's bathroom sits over the back of the shop.
The problem
Stains kept spreading across the shop's ceiling tiles, worst after the morning shower upstairs. The landlord's plumber had found no cause under the bath.
How we found it
Moisture readings in the shop put the damp under the bathroom. Upstairs, each fitting was tested alone; only the shower spraying the wall tiles wet the ceiling, and thermal imaging agreed.
The outcome
Worn grout and sealant where the shower hit the tiles let water behind them. The landlord had them redone, and our report gave the landlord and the shop the same evidence.