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Pebble dashing leaching

  • 17-05-2019 10:29am
    #1
    Doop
    Registered Users, Registered Users 2 Posts: 1,473 ✭✭✭


    Just wondering if anyone has any experience of this,

    A house which has been externally insulated and finished with a pebble dash effect externally is now demonstrating what looks like metal oxide(?) staining, basically areas of rust stain. The installer has advised its due to the pebble dashing and wants to chemically clean it off, however, the obvious fear is it'll be back in 6 months - year etc etc.

    Has anyone come across this before...will it keep reoccurring? Does anyone know any stone/aggregate experts that I could refer to?


Comments

  • #2
    10 Carrolls
    Registered Users Posts: 104 ✭✭10 Carrolls


    Had something similar to this, it was an algae, reddish colour, looked like rust. Bought a can of moss/algae killer in a garden centre, sprayed on with a knapsack. It said to wash off after a few days but the rain did that job, cleared it no problem, hasn't come back since, done a couple of years ago.


  • #3
    Doop
    Registered Users, Registered Users 2 Posts: 1,473 ✭✭✭Doop


    Im familiar with the red algae alright, this is definitely a rust staining I imagine from metal properties within some of the stone.


  • #4
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,141 Mod ✭✭✭✭BryanF


    Review product warranty and clean regime.


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