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sw879

What's going on?

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Hi everyone

 

Our build is nearing completion after under going a major overhaul. It's a duplex victorian town house in London and we own the two lower floors (ground and lower ground).

 

We've noticed some rather odd 'bubbling' on the side of one of our walls (in the hallway on the lower ground floor).  On the other side of this wall is another lower ground floor property.  Before we renovated the house we did notice damp in this same area.  

 

A couple of months ago we asked our builders what the 'bubbling' could be and they said they didn't know as they had damp proofed it already.  

 

In the last couple of weeks we've seen the 'bubbling' get worse and now the skirting is cracking away (see image attached).  We asked our project managers about this and they say it's the paint.  I find this hard to believe as this is not happening anywhere else in the house.  I never saw how our builders damp proofed this area but I think they laid some screed? (we visited when they laid the underfloor heating and I didn't notice anything then).

 

Does anyone know what this could be or what we should do?  I have more pictures (including those during the build) that I can attach if that helps?

 

Any help is greatly appreciated.

 

Thank you

IMG_7699.jpeg

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It's not paint. It looks more like penetrating damp either through from the neighbours side or through a breech in the DPC. Notice how it looks worse near the floor.  This is easy to confirm with a damp meter.  No quick fix, that I know off.  

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36 minutes ago, TerryE said:

It's not paint. It looks more like penetrating damp either through from the neighbours side or through a breech in the DPC. Notice how it looks worse near the floor.  This is easy to confirm with a damp meter.  No quick fix, that I know off.  

Thank you Terry.

 

What’s the slow fix? 

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More likely rising damp, assuming 'lower ground is at least partially below ground level. I'd have a poke about with a screwdriver and see if anything falls off easily; it's difficult to say, but it looks like the plaster may have blown, or if the skirting has been there a while it might soft.  If it is damp, I'd get a specialist to have a look at it;  the solution is likely to be a bit messy (hack off plaster and tank maybe?), so you only want to do it once.  More pictures would be interesting.

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Deffo damp.  What was on the spec for remedial damp proofing/ tanking / waterproofing?

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More likely leaking plumbing/rainwater getting in, what is on the other side of that wall? 

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1 hour ago, tonyshouse said:

what is on the other side of that wall? 

 

3 hours ago, sw879 said:

On the other side of this wall is another lower ground floor property

 

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Shower room, kitchen sink, Radiator, washing machine? 

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