Mouldy plasterboard ceiling

  1. fizzy Member

    Messages:
    3,586
    uk
    I hate DIY - give me engineering any day!

    I need to clean up a nasty mouldy patch on an office ceiling where we had numerous water leaks due to a landlord from hell.

    I was thinking of scraping all the loose stuff off. Then cleaning with bleach. Is it worth using some sort of sealer before painting? Is there some proper paint to use or will any old emulsion do?

    Something like this perhaps?

    https://www.screwfix.com/p/no-nonsense-trade-bare-plaster-paint-brilliant-white-10ltr/51004
     
  2. roofman

    roofman Purveyor of fine English buckets and mops

    Messages:
    5,789
    Location:
    North West
    it will bleed through the emulsion..coat of gloss on effected area or neat unibond i use then after its dry the emulsion over the top
     
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  3. brightspark

    brightspark Member

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    yarm
  4. fizzy Member

    Messages:
    3,586
    uk
    Zinesser and unibond make loads of different sealers - which ones do I use?
     
  5. brightspark

    brightspark Member

    Messages:
    24,967
    Location:
    yarm
    the one ive put link tohttps://www.screwfix.com/p/zinsser-b-i-n-shellac-based-primer-sealer-1ltr/29661?tc=RB4&ds_kid=92700030933329625&ds_rl=1241687&ds_rl=1245250&ds_rl=1243321&ds_rl=1245250&ds_rl=1249484&gclid=EAIaIQobChMIsbH0h9-C4QIV2eFRCh0mXg30EAQYASABEgJlafD_BwE&gclsrc=aw.ds had to use it on celing and wall after the boiler pipe came off and ruined the decoration that had recently being done :( left a big stain 2 coats of that and re coat emulsion and as good as new now
     
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  6. fizzy Member

    Messages:
    3,586
    uk
    Cheers looks promising.
     
  7. fizzy Member

    Messages:
    3,586
    uk
    Your avatar is VERY apt!
     
  8. fizzy Member

    Messages:
    3,586
    uk
    My cure for our leaky roof.
     
  9. fizzy Member

    Messages:
    3,586
    uk
    20190228_200556.jpg
     
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  10. fizzy Member

    Messages:
    3,586
    uk
    Finally found the problem - hook bolts on roof leaking then tracking across.
     
  11. slim_boy_fat

    slim_boy_fat Forum Supporter

    That's not a cure, that's a diversion. :scared:

    As the lads have said ^^ , some of the stain block products ought to do the job. I suspect it'll need to be completely dry though. Is it too big an area to just cut out the wet p/board and replace with a patch?
     
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  12. fizzy Member

    Messages:
    3,586
    uk
    The buckets have been there for ages. For some strange reason part of the roof where it leaks was plaster boarded. It was only when we pulled down a sheet of plaster board we could see the problem. Roofers replaced all the main gutters 6 months ago. Cured most of the leaks but not these. They have been back twice but couldn't find the leaks before. Amazing how much water comes through a few dodgy bolts.

    Plaster board in the offices no longer wet. Been dry for a few months now as we have the tubs in just the right spot. There are 5 other places with tubs and paddling pools!
     
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  13. slim_boy_fat

    slim_boy_fat Forum Supporter

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  14. 123hotchef Member

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    6,031
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    Kent
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  15. angellonewolf

    angellonewolf Member

    Messages:
    3,522
    Location:
    bristol england
    paint using oil based under coat and then paint done it loads of time

    clean off first and use watered down bleach leave to dry
     
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