Mold-Mildew Resistant Grout?

Discussion in 'Shower & Bathtub Forum & Blog' started by danboston, Apr 3, 2011.

  1. danboston

    danboston New Member

    Mar 19, 2011
    Lawrence, Massachusetts
    Does anyone know if there is a tried-and-true grout out there for tiling bathroom shower stalls that is mold and mildew resistant?

    I am considering using the Swanstone shower kit or tiling a new shower stall in my basement and am very concerned about mold and mildew. I hear that the Swanstone products are very good in regards to resistance to mold and mildew.

    However, I am also concerned that the Swanstone panels will start coming off the walls in about 10 years, whereas, tile is pretty much maintenance free (other than potential mold-mildew issues).

    Any and all comments are greatly appreciated.
  2. LLigetfa

    LLigetfa DIYer, not in the trades

    Feb 6, 2011
    NW Ontario, Canada
    The one thing to remember with mold and mildew is that it requires a food source. Eliminating the source of spores, the moisture, and the food, go a long way in preventing mold and mildew.

    One can also use products with mildewcide in it. There are good mildew resistant paints, silicone seal, and grout additives like Grout Boost.
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  4. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    Why would the swanstone panels come off in ten years??

    You can use the best products out there, but grout and caulk will be a maintenance item. You can't just ignore the fact the they need to be cleaned on a fairly regular basis, and if you allow high humidity, nothing will stop the mold. The BEST product to spend a little money on in a bathroom is a top quality fan....quiet and HIGH cfm
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    There are some grouts that come with mold inhibitors built-in, whether you can use the addatives to any grout is an open question, and it may have variable results. If you can minimize at least one required item, mold can't grow (moisture, spores, food). By far, the easiest to minimize is moisture followed by food (regular cleaning). Not much you can do about the spores, they're almost literally everywhere. A shower built with a surface membrane means less subsurface can get wet so the whole shower dries out quicker. If you want your grout to be long-term mold free, then consider an expoxy based one - lots more money, but then, you won't be replacing it either. The simplest thing to minimize mold in a shower is to wipe the walls and floor after done...most won't do that, so good ventillation is probably the most convenient (put the fan on a timer or humidistat so it actually runs long enough to do its job).
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