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White stuff on outside wall

  • 02-01-2014 9:26am
    #1
    Seweryn
    Registered Users, Registered Users 2 Posts: 4,499 ✭✭✭


    Hi Guys,

    There is something that occasionally apprears on the outside wall of the house and I will appreciate if you could help me idetify the source of this, and how to deal with the problem:

    11704867314_8f35fd7086_z.jpg

    11704736453_18c57f18a2_z.jpg


Comments

  • #2
    CJhaughey
    Registered Users, Registered Users 2 Posts: 14,907 ✭✭✭✭CJhaughey


    Its called Efflorescence, basically its dissolved minerals leaching out of the concrete and drying to form crystals or deposits.
    You can buy a special chemical to remove it from most hardware stores.


  • #3
    shamanpriest
    Registered Users, Registered Users 2 Posts: 16 ✭shamanpriest


    I agree with CJ Haughey, It's known in the trade as salt or salting. You can purchase a clear solution that seals the exterior wall and then can be painted over. Often home owners complain of dampness or condensation on inner walls as a result of drastic salting on the exterior wall (not just small patches.)

    Heavy salting can be an early sign of a porous exterior wall. However if it's only in minor patches clean it off with a solution of bleach and water and then use sealing solution.


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