Odd damp problem

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Sheffield
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Moved into a terraced house. Old victorian one
Noticed in June a damp patch where two microbore pipes run. So thought a leak in pipe work.
Ran new pipe work away from area and new radiator fitted..all old pipe work drained and no longer active
Damp patch is about half a meter of the ground.no sign of damp lower down
Dried the wall out with a Heater and it seemed to have gone
It has now come back
Checked with neighbour he has no damp patch in that area or any pipes or radiators that he knows about

So the question is what could it be? Could it be damp at that height ?? Or could it take months for the dampness to come out. Its only in a small area. It just a coincidence for it to be anything else other then a leaking pipe. Or could it be an issue with next door?. Could the damp be coming from next door as I believe this side was treated with a DPC.. and showing above the area where the treatment ended? So rising up from their side and then popping through (If that makes sense)
 
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Plumbers are simple folk.
Perhaps you can post a pic or two to help them see the problem?
 
Plumbers are simple folk.
Perhaps you can post a pic or two to help them see the problem?
Well it was me tbh who thought it was the microbore leaking as it made perfect and logical sense . And the new radiator has kind of hidden the issue. Cant take a pic due to location but the damp is only in one spot about 7 cm wide and just under half a meter of the ground on the party wall
 
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If the 'leak' has been active for sometime, it will take a while to be completely dry. If you used a heater you've just dried the surface.

Is it possible there are other pipes in the vicinity to the originals? Either yours or neighbours.
Copper pipes should also be sleeved when going through brickwork, due to corrosion.
 
If the 'leak' has been active for sometime, it will take a while to be completely dry. If you used a heater you've just dried the surface.

Is it possible there are other pipes in the vicinity to the originals? Either yours or neighbours.
Copper pipes should also be sleeved when going through brickwork, due to corrosion.
Thanks no other pipes my side. Don't think neighbour has either.
 
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Cant take a pic

Try.

Inside and out.

The whole wall, from roof to ground.

Include the gutters, drains, DPC, floor, external piping, any overflow pipes, the damp patch, windows and doorways.

And a sketch floor plan that shows the drains, external and internal stopcock, position of sinks, bath, washing machines and waterpipes.
 
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About a month per inch thickness of wall.

Nobody really knows your situation because you don't consider it necessary to help us to help you.

Hence few replies.
 

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