Urgent- white stuff on chimney powerwashing doesn't help

Discussion in 'Pressure Washing' started by sdrah, Jun 4, 2014.

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  1. sdrah

    sdrah Guest

    Hi - as per title I have to clean a chimney tomorrow however not sure how and what to use to clean it .... All around has a WHITE STUFF on bricks which looks similar to salt - very hard and in some places 1/4 of inch think .

    I tried a turbo nozzle at about 2800 psi and it doesn't help - nothing at all - the customer said that many years ago it was the chimney of an oil burner ?! now not in use .. I forgot to take a photo ....
    Tomorrow I have to finish to clean his roof and it will brilliant if I can leave the chimney clean too . may be somehow to use a sander ?! : ) or a chisel however there are few damaged bricks and I assume somebody already tried ...

    any ideas ?!
     
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  2. mr shine

    mr shine Guru
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    im told this that this stuff works , its available from stonecareuk.co.uk , its called a colour enhancing impreginator , its pricey 1 litre is 20 quid , i also read that a penetrating sealer should be applied to stop it coming back but that stuff that stonecare supplies claims to contain a sealer . maybe someone else will know more about it
     
  3. M-CLEAN UK LTD

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    Did you take any pictures?

    Rob
     
  4. M-CLEAN UK LTD

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    Just re read it - no

    Rob
     
  5. sdrah

    sdrah Guest

    probably is efflorescence it looks very similar to the photo below but worse

    [​IMG]
     
  6. M-CLEAN UK LTD

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    I would say that it is calcified efforvescence. Basically a large build up that has developed through damp conditions.

    It is extremely difficult to get off, my machines will take a lot of it off but no guarantee of removal.

    High strength brick acid, not the stuff from B & Q

    Rob
     
  7. M-CLEAN UK LTD

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    You'll find you can chip away at it and once it starts coming off it is brittle

    Rob
     
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