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  • Damp
    hariba
    Hi everyone,

    I’d like a bit of advice about damp. The house is an old (1800’s) end terraced house.

    My tenant told me this time last year that she was experiencing mould patches on the walls upstairs. I had a look and thought it to be caused by poor ventilation etc and...
    10-10-2019, 12:06 PM
  • Reply to Damp
    OneSmallStep
    Unfortunately, some tenants do not understand how condensation is formed and how they are creating it. They see wet walls and automatically assume it is water coming in from outside. Obviously, in some cases it is a failing in the building structure or a simple fix like a blocked or faulty gutter....
    11-10-2019, 21:10 PM
  • Reply to Damp
    nukecad
    Those photos don't look like a condensation problem.
    I'd expect condensation on large flat surfaces rather than in the corners.
    10-10-2019, 17:45 PM
  • Reply to Damp
    AlexR
    There is a book called 'The Rising Damp Myth' by Jeff Howell in which he argues the case very convincingly...
    10-10-2019, 17:20 PM
  • Reply to Damp
    AlexR
    Because you tried that last year and its back again! Unfortunately there is no one 'expert' who can help - they only deal with their own area of specialisation. You need to look at the whole picture yourself and take a view.

    I had damp issues in many Victorian terraced houses and each case...
    10-10-2019, 17:13 PM
  • Reply to Damp
    mariner
    Injectable DPC may last only 10 years or may have been 'bridged?
    My builder prefers to 'chase out. the morter and insert a roof tile barrier.
    Try fitting a pot chimney cowl to lessen amount of rain entering the chimney.
    Many Victorian propeties may only be 'single skin', prone to...
    10-10-2019, 15:01 PM
  • Reply to Damp
    leaseholder64
    If there is no such thing as rising damp, damp proof courses are a con, and the long multithread on the building without one is based on a false premise.

    A very long time ago, I was in a seaside basement flat where a spare room had serious mould problems, because it was below ground and...
    10-10-2019, 14:11 PM
  • Reply to Damp
    hariba
    AlexR - good points, as yes it is rendered - again that was re done around 5/6 years ago but worth rechecking to see if there’s any cracks. And yes it is the chimney wall. The chimney is in the middle of the wall and the mould patches are on the 2 opposite ends. The wallpaper is the anaglypta type...
    10-10-2019, 13:24 PM
  • Reply to Damp
    jpkeates
    I made a mistake in my post, mortar is also alkaline, I meant to say that the acid balance (the Ph level) is wrong for mould, but I got carried away.

    Mould needs neutral water, so if the plaster is alkaline water coming through it won't support mould. Water condensing on a surface will....
    10-10-2019, 13:14 PM
  • Reply to Damp
    AlexR
    Your instincts are correct in that it won't be the DPC - you need to look at roof,chimney flashings,gutters and the gable end wall. I owned an end terrace house with a similar problem with tenants complaining about mould growing on clothes, walls etc and black patches on the walls.

    The...
    10-10-2019, 13:06 PM
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