Hire the best Concreting Expert

concrete surface problems

Results 1 to 2 of 2
  1. #1
    Join Date
    Jun 2005

    Default concrete surface problems

    Hi all,

    On one part of my concrete patio I'm getting a white powder buildup on the edge of the concrete. I thought this was just from salts from the surrounding dirt, however it seems to be affecting the surface of the concrete itself. In particular, the surface of the concrete is flaking and brittle and the aggregate is starting to be exposed.

    Any ideas and solutions?

    Edit: Actually this looks like the issue http://www.radonseal.com/radon-faq.htm#efflo

    Thanks in advance,

  2. #2
    Landscaper Planned LScape's Avatar
    Join Date
    May 2007
    Bundoora, Melbourne


    Efflorescence is pretty common with concrete products, and also clay pavers. The natural salts come through the surface and there's not much you can do in most cases bar either waiting for it to disappear or getting something like "Anti-Eff" which gets rid of it. This can be bought at paving suppliers

    Although I have seen some concrete slabs have a whitish powder on top and a weak surface from being too wet during screeding and thus having a higher water content being weaker once set.
    Planned Landscape Constructions

Similar Threads

  1. Fencing over a concrete surface
    By Dave_KB in forum Concreting
    Replies: 2
    Last Post: 14th May 2008, 06:47 PM
  2. Best Wall Surface for ceramic tiles
    By ECJames in forum Tiling
    Replies: 3
    Last Post: 31st Dec 2007, 11:42 AM
  3. Old slab surface repair
    By OBBob in forum Concreting
    Replies: 3
    Last Post: 7th Nov 2007, 06:21 PM
  4. Driveway surface
    By silentC in forum Concreting
    Replies: 61
    Last Post: 13th Jul 2007, 01:02 PM
  5. Kapur - what surface treatment is needed?
    By occam in forum Decking
    Replies: 5
    Last Post: 17th Oct 2005, 12:31 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts