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PostPosted: Fri May 12, 2017 10:55 am 
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Hi There,

Can anyone help diagnose and suggest a remedy for the small damp patches I have attached in pics?

A bit of background info...

- The property had been empty for over a year before I purchased it
- A damp proof course was installed in 1988 by builders (have the certificate) - the plan shows all the walls were addressed that have damp spots now other than the small interior walls either side of the arch from living room to dining room
- The room has recently been re-rendered and plastered (not breathable)
- Before plastering, there was significant damp midway up the wall above dpc - survey said this was condensation damp
- Survey said to remove old render, spray with salt neutralising solution, then re-render and plaster - which I have done
- Plasticiser wasn't added to the cement render
- In a few places I also added my own dpc cream treatment before re-plastering / rendering drilling the mortar line as lose to the floor as possible
- I have also since gone under dinging room floorboards and drilled / added dpc cream around brickwork
- The property is victorian terrace
- Living room is solid concrete floor, dining room is floorboards
- Chimneys have been repointed and pots capped

Thought I'd ask before going back to damp specialist as there is a £60 fee for coming to check

A ny help much appreciated.

Thanks
Dan


Attachments:
File comment: Living room interior alcove (to dining room)
Living-Room-Archway.jpg
Living-Room-Archway.jpg [ 149.81 KiB | Viewed 458 times ]
File comment: Living room exterior alcove
Living Room Exterior Wall Alcove.jpg
Living Room Exterior Wall Alcove.jpg [ 329.41 KiB | Viewed 458 times ]
File comment: Living room interior alcove with spot further up
Dinning-Room-Arch-Wall-2.jpg
Dinning-Room-Arch-Wall-2.jpg [ 110.45 KiB | Viewed 458 times ]
File comment: Dining room interior alcove (to living room)
Dinning-Room-Arch-Wall.jpg
Dinning-Room-Arch-Wall.jpg [ 124.32 KiB | Viewed 458 times ]
File comment: Dinning room alcove on exterior wall
Dining-Room-Exterior-Alcove.jpg
Dining-Room-Exterior-Alcove.jpg [ 140.35 KiB | Viewed 458 times ]
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PostPosted: Fri May 12, 2017 11:36 am 
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Hmm.... it does seem to be rising damp in some of the pictures you have shown. Damp can rise around 8 foot depending on the porosity of the structure so even a small breach in the damp course can build up over time. The other thing to check is on the outside as a defective area in lead flashes, window caulking or even a rainwater gutter issue can lead to water running down the wall and finding its way in.

Another thing to check is airborne moisture from cooking, washing, showers and wet towels. This will condense on all the cold spots as well. Hopefully these are a few checks you can make before calling in a damp specialist. :thumbright:

DWD

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PostPosted: Mon May 15, 2017 9:47 am 
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Thanks for the heads up DWD!

I'll have a good check around and see what I can do with it

Dan


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