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    Wall bleeding/staining

    Painters & Decorators

    How does bleeding/staining occur on a wall? Why is this happening what can I do about it?

    Asked by jonathan on 18th Mar 2021
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    Best Answer


    "Stain block as a temporary cure(a few good years), assuming there's no condensation or water leaking that may be pointing to other issues. You may want to find the cause to find the treatment. Also, it may be from plastering work as it may be too old, the previous leaking that infiltrated the rendering."

    Answered on 18th Mar 2021 - Member since Jan 2015 - report
    Be Safe Property Maintenance ltd

    "Usually due to water ingress if area is dry use a stain block allow to dry properly and then paint over may need a couple of coats"

    Answered on 23rd Mar 2021 - Member since Jun 2019 - report
    S Wilson decor

    "It’s caused by water or moisture bleeding through the paint. The first job is to stop the
    Water from coming through! Wait till fully dry and then treat with an oil-based stain blocker like Zinsser stain block. It’s available in a spray can or regular paint on with a brush."

    Answered on 18th Mar 2021 - Member since Mar 2021 - report
    Reach N Shine Property Maintenance Service

    "Hi, use PVA bonding before you paint the wall will stop all bleeding marks from coming through"

    Answered on 18th Mar 2021 - Member since Aug 2016 - report
    South East Construction & Maintenance

    "It is caused by moisture. First you have to locate the source of that and fix it (ie. deep cracks, broken dpc, dripping pipework), when that is done you can use stain block first and repaint the area."

    Answered on 15th Apr 2021 - Member since Mar 2021 - report
    SD Contractors

    "It is probably some sort of damp from either a previous leak or condensation issue you can cover it with an oil based paint until not visible and then finish it with a couple of coats of emulsion and that will sort it"

    Answered on 18th Apr 2021 - Member since Oct 2020 - report
    T@P decorating

    "The most likely result would be moisture getting in . If it’s by a window try resealing the window or it could be maybe some repointing needs doing"

    Answered on 12th Apr 2021 - Member since Mar 2021 - report
    Lewis Decorators

    "If it’s yellow/brown then that’s water
    If it’s a dry wall then maybe there’s a slight dripping coming from a pipe/hose from inside.
    Once located and fixed let the wall dry then paint with oil-based paint then put your topcoat over that."

    Answered on 18th Mar 2021 - Member since Jan 2019 - report
    Pataki Peter


    Sorry for the late response. It could have a lot of origins we raise a lot of questions to discover where the problem comes from.

    Including soot stains, house dust stains, pet or animal stains, and thermal tracking or thermal bridging stains associated with building air leaks, and building insulation defects.


    Answered on 13th Apr 2021 - Member since Mar 2021 - report
    Russ Thomas

    "You have to buy a stain blocker it comes in paint or spray, put it on wait till dry then paint over it."

    Answered on 18th Mar 2021 - Member since Sep 2020 - report

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