Cold solid walls, how to heat?

Davesnave

We used to have a house with a lead cold water feed to the bathroom buried in the plaster of the outside wall.

Being behind a unit of furniture, we didn't worry unduly about this, but mould gradually built up on the wall at that point, and that point only.

Just a thought.

Lukeedwards88

Did a further inspection this weekend, render is intact and no cracks etc

Funny thing - the outside wall did not feel cold at all, so even more confused now.

naf123

There are all sorts buried in the wall.

Is there any pipes including radiators or water pipes nearby ? Any gutters?

What is the room upstairs? is it near the bathroom? Sometimes something leaky like a broken seal around the shower basin can cause water to run along the brickwork to all sorts of odd places.

Lukeedwards88

No pipes etc.

The bathroom is above, but I would suspect the damage would be more near the top if there are any leaks etc