Damp on wall

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Afternoon all,

Popped round to my mum and dad's place yesterday, appears that was a mistake! I get the "oh I'm glad you're here"...

They have damp appearing on the same exterior wall in the front room and bedroom (bungalow).

First pic is the patch in the living room. Second pic is the bedroom wall the other side. You can see the radiator pipes that feed the one in the first pic. Then there's the pic of the hopper and downpipe outside.

Today I popped back round and my theory was that there could be a problem at the flat roof by the hopper. Well, a stuck tennis ball had completely blocked the hopper so in was a big pool of water in there.

My thinking is that this was allowing water to get under the lead and get into the cavity and drip down and create the damp inside.

Would appreciate your thoughts as to if you reckon that is the problem?

Thanks as always
 
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Your theory sounds fine but if the hopper was blocked and overflowing what lead was it getting under.
there should be an overflow to cover for main outlet blockages.
 
powerst, good evening.

Following on from Alistair's post above?

I managed to copy paste and then zoom in on the first image posted. Is it a trick of the lens, or is there a seam or joint in the internal vertical lead within the outlet? on the left hand side as viewed?

As for the Bedroom Image? is that a device for airing clothes?

Ken.
 
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Thanks for the replies.

The bedroom pic is inside a cupboard so that's just a clothes rack not a drier. You can maybe see the floor is also soaking wet so it's not condensation.

With regard to the lead in the first pic you may well be correct but I'm not there at the moment to see. In the square outlet the lead from the flat roof continues out and flaps over into the hopper. My thoughts were that it was filling the hopper and getting under the flap.
 
powerst, good evening again.

In the Bedroom, where the Carpet is wet? are those two visible pipes serving a radiator? or similar? if so that may be the source of the leak?

If the Carpet is soaking but the walls are only now showing indications od dampness then the water may actually be escaping from the plumbing somewhere and giving rise to the Problem, in that room at least?

As an aside is the C/Heating having to be topped up every few days? if it is a pressurised system? if so that is a clear indication of a leak in the Central Heating System?

Ken.
 
Hi ken,

Thanks for the reply. Yes, those pipes feed the radiator that you can see in the living room pic. I did cut away the plasterboard by the pipes but they don't appear to be leaking.

Also the pipes come from the roof above so they don't run in the floor.

I think I'll see how the situation goes and if it starts to dry out.

My other concern is how to get it to dry out faster if the water has got into the cavity. Drill a few holes maybe?
 
powerst, Hi.

You would need to induce a flow of air in the Cavity so holes will not really assist?

As for drying out? suggest a Fan, played on to the damp areas will assist, no need for heat, simply air movement.

Cheers.

Ken.
 
Ok will tell my mum to try a fan and see how it goes over the next couple of weeks.

The next job is repatching the damage once it's dried out. Oh the joys! :D

Thanks again Ken.
 

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