Flooring Contractor Tips for No Callbacks

Jason’s top three tips to prevent callbacks:

1: Get involved early
2: Understand product moisture tolerances
3: Do accurate moisture testing

Questions or comments? Drop us a line in the comments below or give us a call at: 800-634-9961.

Free Download – 4 Reasons Why Your Concrete Is Taking Forever to Dry

Last updated on August 31st, 2021


  1. Jim says:

    I am rehabbing a 68-year-old house with a concrete slab foundation. Moisture has begun to show up on the surface of the concrete only in the hallway. The water has been severed for 3 prior months and new sewer lines, which are located in the outside wall, have replaced the old sewer lines. There are no pipes in or below the slab.

    This moisture started to show up 2 hours before it started to rain!

    I just bought the house and have no historical knowledge of this problem. I took out the hallway carpet and it showed no signs of mold.

    • Jason Spangler says:


      Thanks for the comment/questions. Carpet is typically breathable so IF there is moisture coming from below, it may have dissipated through the carpet, into the ambient air and never causing a mold issue. Now, I say IF because you are speaking of physical moisture on the surface and bring up rain. With the rain scenario, the humidity in the air was probably elevated and depending on the surface temperature of the concrete, this moisture may have just been condensation. I would buy a thermos hygrometer like this https://www.wagnermeters.com/shop/th-200-thermo-hygrometer/ and monitor the RH% and air temp for consistency.



  2. Linda Dwyer says:

    Hello, My Huntington Beach, CA home is 44 years old, for 6 yrs I have had a moisture problem in a dining room which has ruined two engineered wood floors, one being sealed with Bostick (about 15 yrs ago) and the 2nd one being laid with a two-in-one, Tight Bond (about 2 yrs ago). Two holes (kitchen and dining area) have been jackhammered to expose the soil which is dry, below the visqueen, which is intact. By doing the RH test, will that determine what sealer I need to use on the concrete? I hope to put down a vinyl floor and work with the issue. Can you recommend a sealer?

    Thank you,
    Linda Dwyer

    • Jason Spangler says:


      Thanks for the question. Yes, doing RH testing will help you establish what type of product to use to mitigate the concrete moisture issue. One thing you don’t discuss though is how do you know this is a concrete moisture issue because, by all accounts, i.e. intact vapor barrier original construction seems to have been done correctly. What is causing the concrete moisture issue? As far as recommending a product, that’s not something I usually do. I would follow manufacturer’s recommendations, both adhesive and finished floor product, of the products you are going to use on the slab going forward. Good luck.


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