Where The Hell Is This Damp Coming From?
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- Опубликовано: 15 дек 2022
- Roger is called in to troubleshoot another damp problem.
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#damp #home #diyhacks
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Do hope you do a follow up on this would love to see the results of your findings and the fix. 👍
There's a lot of problems here that Roger hinted at - if the wall is damp but dries out when you scrape off the surface then it's probably the surface that's the issue. In this case it's probably modern plastic paint and maybe gypsum plaster holding in the moisture. Somebody removing a suspended floor and filling it with concrete is another red flag - this along with the plastic membrane is just going to push any moisture into the walls. Next is the tiled wet room, again there's nowhere for moisture to go unless the ventilation is spot on. Now add on the cement pebbledashing on the wall exterior and the cement pointing which won't help either. Checking the drains is good though as they are often faulty. Sometimes the question is not so much "why is the wall wet?" but "why is it not drying out?"
Just had a similar one. Replaced the solidly blocked drainpipes because of tree roots, dehumidified, and installed plastic dpc 3 bricks at a time and still two awkward walls not drying properly. Turned out the old lead main had a constant leak under the concrete floor behind the kitchen corner unit. Looking much better now. Sometimes damp problems are best solved with your ears, rather than a damp meter.
Fascinating detective work!
I remember Crawley Council's plan to build an entire housing estate (which they did) on a rubbish dump landfill just west of the place. There was the usual excuse of a 'public consultation' and I wrote my worries to them - subsidence, the poisons that will be in there (even if supposedly, theoreticaly none was ever dumped there) the movements of different materials towards the surface, gasses and bacteria buildup, etc etc - they wrote back saying there was no evidence for these issues being a problem - yet the National Geographic had on its front cover some years ago a photograph of the tyres etc. migrating up around/through a runway built on a dump in the US and an article on the problems was there to explain the detailed and problematic findings - what possible more proof could one ever need? The mind boggles as to the stupidity, short-term thinking and corruption in the UK.
Well there's a cliff hanger!
04:24
This was fascinating. Thank you for sharing.
I pass an estate near Caerphilly built on a rubbish tip. I was a boy when it the tip was closed . Now I am 60 amd I do wonder if people know what is under their houses.
Good advice here - "dont jump to conclusions" and sometimes one has to adopt a process of elimination. No doubt there are those that would have diagnosed "rising damp" at the drop of a hat so its good to see a more logical assessment.
Hi Roger, I have been enjoying many of your videos, this one caught my eye because in forty years of roofing plus another fifteen in general construction damp has been a constant cause of trouble for many people. Being of a natural disposition to curiosity I have always wanted to know more and tracing the source of leaks in roofs turned out to be relatively straightforward!, when water is actually running enough to be seen it is usually quite easy to trace back to the source. Damp patches on walls on the other hand can be much more difficult, it was not until I discovered that in most houses the primary cause of low damp patches is heat loss!. When too much heat escapes through the wall the consequent cold patch gathers condensation!, this is quite often associated with a wet bit on the wall outside caused by blocked or leaking drainage or overflowing gutters, this wet patch on the outside will dry out when the rain or drain stops and in doing so draws a lot of heat for evaporation. Most ordinary people just assume that the wet on the outside is passing all the way through the wall tom the inside but in my limited experience I have never found any evidence, in total flood conditions liquid water will go right through but for a small patch of wet on the outside tom become a larger patch of damp on the inside seems somewhat improbable!
Dealt with an issue in NYC where chinese contractors installed a toilet without a floor gasket and this was in a commercial building. It is amazing how bad contractors can't or won't do the simple basic things.
Great advice 👍
Thanks Richard
Wish I had a builder like you when I bought my first house 30 years ago. Damp was detected , had to have an obligatory injected course due to mortgage conditions. Got the usual useless piece of paper certificate from the damp company that probably went out of business straight after. House continued to suffer damp, it had new expensive uPVC windows looking back, there was no trickle vents, our house was hermetically sealed, hence the damp.
Keep up the good work Dodge 👍
The first thing my Grandfather did before any of the family bought a house was to check all the drains...he was a foreman at Cubits.
Loving the video Roger; it is really informative.
Absolutely on the mark, I had a terrace house with an extension bathroom damp problem. It turned out the toilet wasn't installed correctly (no seal fitted) and every flush was adding to my rising damp issue!
Looking forward to part 2 Rog