Penetrating Damp misdiagnosed.

[@petersaint656]

Hi Neil. Just a quick thank you for the videos on your channel. They are all informative, fair and most of all knowledgeable. Having just purchased a property I’m finding them invaluable so thanks again.

[@Stan_55UK]

I concur. We are renovating a 1900 house, and agree that there is useful info here.

[@matthewgaler6544]

Dabbing on 9” external wall always asking for trouble.

[@videogalore]

The penny will drop when people stop saying yes to a job. Sadly that's unlikely to happen anytime soon, so instead we have to ensure that professionals are well trained so that they can better advise clients.

[@reformerx667]

So what was the actual solution?

[@halstirrup]

Having being able both a homeowner and now builder I blame both parties. Homeowner can educate them self about the type of building they live in . And for the builder , good training and knowledge is key. Also if we base our decision on price then don’t blame others for having made decisions based on price instead on what actually needs to remediate the issue.

[@will5219]

I’ve got the same issue on my exterior walls but, i also have the same issue on two of my interior walls, damp on the chimney breast (with loads of salts) and damp on the opposing but still interior wall. Obviously without pictures you couldn’t recommend much but do you or anyone have any thoughts? Looks like penetrating damp, comes in circular patches where it’s been dot and dabbed with gypsum plaster.

[@leegorman3329]

gypsum products draw moisture in on solid walls, your supposed to use lime only to help moisture be able to pass in and out, but who the hell in this day and age is going to pay that, i know the majority of my customers do not!! but back when i started learning i was just told to s&c could i ask what your process would be please, obviously after any external pointing needed correction

[@Joe-jg5vs]

Would of been really good to see where it was penetrating from on the outside too.

[@liamthornhill5122]

even without penetrating damp why on earth would you dot and dab onto external walls

[@Mr27363]

My thoughts exactly Liam. 🤔

[@paulripley4095]

The plastering is atrocious I would not have paid for that

[@richardwalker6417]

What should they have done, or what is it you plan to do putting this right now?

[@Mr27363]

Hi Richard, they should have addressed the defective external render then promoted rapid drying out before assessing what if any internal remedial work was necessary. Simply dry lining the internal was never going to solve the problem. 🤝

[@johncranna9427]

​@Mr27363 rendered outside? Well first job would be to remove render, presumably cement based which holds water in the wall. Remove internal plaster and let wall breathe for at leastv2 months then use Newton lath sheeting that leaves gap between wall and new plaster and plaster over that.

[@Stan_55UK]

@@johncranna9427 I hadn't heard of this method until I read your post. Sounds like it might be the solution for one problem area in the house that we are restoring, so thanks for that.

[@Adam-ui3ot]

I thought rising damp only travels up around 1200mm?

[@teddysuhrensghost263]

That’s penetrating damp through the wall not rising

[@Adam-ui3ot]

@@teddysuhrensghost263 I am aware.

[@Adam-ui3ot]

@@teddysuhrensghost263 I watched the video.

[@johncranna9427]

If you ever find rising damp (as a surveyor I've never found rising damp) it would travel 200 mm up a wall at most.

[@Stan_55UK]

@@johncranna9427 Interesting. That would sort of fit in with our project. The one small area that I think might be rising damp (and I emphasise "might" as I am an amateur) rises less than a foot. The rest of the damp on internal walls was caused by other problems, and went higher. There was also mould present, but none where I think could be rising damp.