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  • Walls have Efflorescence wants mural

     Iain Pearson updated 8 months, 2 weeks ago 5 Members · 12 Posts
  • Simon Worrall

    Member
    January 6, 2020 at 3:46 am

    Hi fellas.

    Happy new year all

    I have a job in a basement.
    The concrete block walls have Efflorescence.
    Efflorescence is a blooming of salt crystals coming through the mortar.
    They have lived with it for years, and as soon as they brush it off it comes back after a few weeks.
    The whole thing is painted cream, and the paint is good on the blocks themselves. Just the cracks between them are a problem.
    the bloom pushes the paint off and creates dusty patches that then drop off.
    The place does not feel or smell damp. Just dusty.

    Is there a very sticky very thick tough wall vinyl that will resist being stretched by the pressure of the efflorescence?

    Or do they have to get the expensive wall problem fixed at source?

    They are happy to take on any responsibility if the product fails.

  • Iain Pearson

    Member
    January 6, 2020 at 8:09 am

    Hi Simon
    Is it not possible to waterproof the walls prior to any work being carried out ?
    We had a similar issue a couple of years ago, client couldn’t afford to have the area rebuilt etc, so we waterproofed the brickwork and went over the top.
    Only thing I would say is that this type of application would only be suitable for a long term permanent installation.

    Alternatively, could the walls be battened and overclad with an ACM or similar to give a foundation for future graphics ?

  • Hugh Potter

    Member
    January 6, 2020 at 8:47 am

    I’d be inclined to agree with Iain on the facade idea..

    The wall and environment must be dry, if salt is crystallising rather than running down the walls then it has to be dry.. I’d simply put 19 or 25mm tile batten or CLS (stud wall timber) if they prefer, then either acm or, cheaper, a foil backed plaster board, the wallpaper will stick perfectly to the plasterboard – though may ruin the face if removed so there’s the choice!

  • Martyn Heath

    Member
    January 6, 2020 at 8:57 am

    I agree with what has been said. I have no experience of fitting brick,concrete vinyl but i think the conditions would make it difficult longterm. I have a similar situation in my cellar, which is my gym. Painted blockwork with the salt coming through, one of the walls is battened and plasterboarded, this is where my wall graphics have been done.

  • Barry Williams

    Member
    January 6, 2020 at 10:46 am
    quote Hugh Potter:

    I’d be inclined to agree with Iain on the facade idea..
    Hi all-
    The wall and environment must be dry, if salt is crystallising rather than running down the walls then it has to be dry.. I’d simply put 19 or 25mm tile batten or CLS (stud wall timber) if they prefer, then either acm or, cheaper, a foil backed plaster board, the wallpaper will stick perfectly to the plasterboard – though may ruin the face if removed so there’s the choice!

    being a paperhanger—we seal the plasterboard with an oil-based primer before hanging the wallpaper.
    This will prevent the paper face on the plasterboard coming away when stripping at a later date.
    If the wallpaper is paper-based rather than a vinyl, and if it is installed with a microporous type adhesive, the wall will be able to breathe and won’t push off the wallpaper. Seems that the brickie used a lot of lime in the mortar.
    Barry

  • Hugh Potter

    Member
    January 6, 2020 at 3:06 pm
    quote Barry Williams:

    quote Hugh Potter:

    I’d be inclined to agree with Iain on the facade idea..
    Hi all-
    The wall and environment must be dry, if salt is crystallising rather than running down the walls then it has to be dry.. I’d simply put 19 or 25mm tile batten or CLS (stud wall timber) if they prefer, then either acm or, cheaper, a foil backed plaster board, the wallpaper will stick perfectly to the plasterboard – though may ruin the face if removed so there’s the choice!

    being a paperhanger—we seal the plasterboard with an oil-based primer before hanging the wallpaper.
    This will prevent the paper face on the plasterboard coming away when stripping at a later date.
    If the wallpaper is paper-based rather than a vinyl, and if it is installed with a microporous type adhesive, the wall will be able to breathe and won’t push off the wallpaper. Seems that the brickie used a lot of lime in the mortar.
    Barry

    Interesting to know Barry, thank you!

  • Simon Worrall

    Member
    January 6, 2020 at 8:00 pm

    Thanks for the replies.

    A bit of googling I found this stuff

    https://www.zinsseruk.com/howto/how-to- … orescence/

    Zinsser Watertite…

    If anybody has any experience of this product Ide be happy to hear it.
    They guarantee the results for five years. Seems too good to be true.

    Otherise any structural work including cladding are too pricey for this customer…at this time, anyway.

    Thanks.

  • Iain Pearson

    Member
    January 6, 2020 at 9:03 pm

    Simon – we use Zinsser for everything mate. And yes it is that good.
    Worth a Punt my friend [emoji106]

  • Simon Worrall

    Member
    January 6, 2020 at 11:23 pm

    I got a sample of Watertite.
    Iain How do you stop this stuff from dripping down the walls?
    It doesnt seem to matter how thin the coat is. :shocked:

  • Iain Pearson

    Member
    January 7, 2020 at 12:29 am

    I’m assuming you are applying it with a roller rather than a brush ?

  • Simon Worrall

    Member
    January 7, 2020 at 8:07 pm

    I am using a brush, as recommended by the manufacturers, to get it right down inside all the rough surface.
    but geez this stuff is gloopy, heavy, and runs downhill if there is the slightest thickness in the coat.
    I suppose a roller would be better if the walls were smoother.

    Dries to a very tough surface. Good stuff.

  • Iain Pearson

    Member
    January 8, 2020 at 4:00 pm

    Yeah it is great stuff.
    If you use it again, might be worth getting a long pile exterior roller to help cover it quicker.
    We use a lot of Zinsser products, especially Bullseye 1-2-3 and Gardz :thumbsup:

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