Possible Penetrating Damp - Advice

maderic · 8 Jul 2020

I'm looking at a property to purchase but very concerned about the damp patches on the rear wall (is it penetrating damp) of what I believe is a fairly new extension. I'm far from an expert but it doesn't look good to me and I don't want to fork out more money on bad surveys etc etc. I can obviously see that fascia boards need replacing but I wonder whether someone would offer some advice please ? Picture attached

thank you

plastic_peanut · 8 Jul 2020

I would suggest forking out for a good survey. It will most likely allow you to negotiate and cover the survey
Costs and any remedial works

IT Minion · 9 Jul 2020

Penetrating damp would be damp on the inside. If it's a cavity wall the idea is that the external half (leaf) can get as wet as you like, but it can't hop over to the internal leaf if it has been done right.

At the moment that photo just shows some water marks on an external wall.

JohnD · 9 Jul 2020

Interesting pattern of stains.

It makes me think of heavy rain blowing off the end of the roof in a storm and running down the gable end.

Is it in a coastal or exposed position?

Have you looked at the wall in dry weather?

Is that the East wall?

^woody^ · 9 Jul 2020

maderic said:
I don't want to fork out more money on bad surveys etc etc.

What?

Surely the whole point of a survey would be to tell you about defects like this and whether the property is worth buying?

And you don't base a decision on forking out a hundred grand or so on a few posts on an internet forum.

Simplez · 9 Jul 2020

maderic said:
I'm looking at a property to purchase but very concerned about the damp patches on the rear wall (is it penetrating damp) of what I believe is a fairly new extension. I'm far from an expert but it doesn't look good to me and I don't want to fork out more money on bad surveys etc etc. I can obviously see that fascia boards need replacing but I wonder whether someone would offer some advice please ? Picture attached

thank you

According to this guy who seems to be knowledgeable it may be down to simply condensation - he really explains it all.

https://www.heritage-house.org/damp-and-condensation/managing-damp-in-old-buildings.html

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Possible Penetrating Damp - Advice

maderic

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