"Dad, can we move that radiator to the other wall?"
Daughter has bought a 90-year old house. She's decorating the living room, had stripped the walls, got a plasterer in, and lifted the carpet. There was a trapdoor in the floor.
We removed the boards - hole was too small for me to get down, daughter could just squeeze in. Getting back out needed a tug! So cut an additional board.
Plenty space underneath - maybe about 3' - we both went down for an explore. Traced the pipes, traced some electrics, came back up. Noticed that knees on overalls were very slightly damp. Didn't think any more of it.
Next night, lifted the floorboards again, the plan that night had been to pull in a few extra cables while the carpets were up. However, there was a problem - a 2" deep puddle under the floor!
It was torrential rain outside. Went out to investigate, discovered a blocked rainwater drain, all the rain from that side of the roof was ending up overflowing into a gap between this house and neighbour - and then going under the floor.
Tried to unblock it, no joy.
Next morning, tried all the usual tricks - plunger, hose, pressure hose etc - no joy. It's a "bodged drain", with a 90 degree bend buried under paving. Silted up.
Admitted defeat and called in a drain clearing company. They had the right sort of tools to clear - took less than 2 minutes!
It's dried out now, still not done that radiator or the electrics.....