Mysterious dappling on ceiling

Discussion in 'Builders' Talk' started by Grace Wilkie, Mar 9, 2022.

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  1. Grace Wilkie

    Grace Wilkie New Member

    Just about to move into a place that has weird dappling on the ceiling.
    It's not light shadows; it's still there when the light's off.
    I thought it could be shadowing but reading about that it looked like that is normally in lines following rafters. This is marks around a circle of no marks IMG-20220307-WA0005.jpg IMG-20220307-WA0003.jpg Any ideas what it is and the cause?
    Hoping it's not mould, but if it is, what could be the cause?
     
  2. quasar9

    quasar9 Screwfix Select

    Does the surface feel damp ? To me it looks like an early stages of damp. I saw something similar in last summer, the cause was a very small leak in bathroom above. The other potential issue is lack of proper ventilation as lot of houses now are too well sealed with no escape for water vapour caused by normal activities like cooking.
     
  3. Grace Wilkie

    Grace Wilkie New Member

    Thanks for replying. No it didn't feel damp. Forgot to mention it's a bungalow, not sure if that's relevant.
     
  4. Tricky Dicky

    Tricky Dicky Screwfix Select

    Hi, Have you had a look in the attic above this ceiling to see if anything is amiss ?
     
  5. quasar9

    quasar9 Screwfix Select

    Is the loft well insulated ? Is there sarking or membrane under the roof ?
     

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