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Unoccupied house mildew / mould

  • 08-03-2022 12:41pm
    #1
    naughtysmurf
    Registered Users, Registered Users 2 Posts: 3,292 ✭✭✭


    Hopefully best place for this, mods feel free to move to more suitable forum

    I’m looking after an unoccupied two story house, built in the 1960,s I think, last night I noticed some mould/mildew where the wall meets the ceiling on north front facing bedrooms

    It had a few weeks of no heating due to running out of oil & resulting in an airlock, that’s sorted & heating is on for a few hours a day again now, I’ve opened the two upstairs bedrooms windows a crack to help ventilation, all upstairs windows are now open a crack

    Anything else I can do to help, I have a dehumidifier I can leave there, should I do that & leave it on all the time or use a timer?

    How often / long should the heat be on?

    nobody living there so no cooking, drying of clothes etc that would add extra moisture to the air, it’s not possible to be there every day, just pop in from time to time

    thanks



Comments

  • #2
    10-10-20
    Registered Users, Registered Users 2 Posts: 8,073 ✭✭✭10-10-20


    I would have thought that bringing the house up to 15 or 16 degrees C and keeping it there for 40 mins per day would improve matters. If the house fully furnished or is it bare? Furniture and clothing would retain moisture, so if possible lay clothes/blankets out thinly rather than in piles and leave the doors, presses and cupboards open. Normally the attic door should be sealed though.

    If the rooms already have functional vents and the house is unoccupied, then adding in the window vents might be over-ventilating it.

    If you have a humidity sensor, ideally between 30% to 50% RH at 15 degrees would be ideal with as little variation around that temperature. It's the great swings which are problematic.



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