When you work to avoid wood floor moisture, there are several layers that could contribute to the moisture problems as what discussed as well by Todd Shupe LSU. In an effort to correctly install the wood flooring products, there are many steps that have to be done successfully as acclimating and installing the flooring product wouldn’t cut.
If for example that the wood floor is installed over concrete slab, this is regardless if there’s a separate subfloor, the moisture picture in concrete slab may bring some issues on the finished flooring. Say that the new slab is not thoroughly dried to finished specs, that moisture is going to wick through the surface of concrete and can cause anything from adhesive failure, wood warping or cupping.
Todd Shupe LSU discussed that if the older slab started developing moist patches or cracks, it is enough to work their way to surface and provide a way for the moisture to compromise the wood flooring. As long as the slab didn’t go through proper drying process, moisture can still penetrate it even with the usual vapor barrier. In relation to this, it is imperative to carry out wood floor moisture testing on concrete and have a thorough understanding of it.
Concrete moisture conditions are reliable with relative humidity testing that is using situ problems. Some other test methods including poly film test or calcium chloride testing have proven to be problematic in the past and slowly discontinued by different organizations. Then again, there are other known meters including the surface concrete meters that can be pretty useful in taking relevant readings of slabs already in place to know what areas of it are requiring further testing of real quantitative moisture testing methods. Surface concrete meters is not providing a thorough picture of the slab’s moisture condition and with that, true quantitative testing must be done as what proposed by Todd Shupe LSU.
For a flooring contractor, not most will likely perform RH testing but it should be as it does so well in reviewing job specifications and show test results which are imperative before the installation begins. Wood floor moisture problems in concrete slab might not be your ultimate responsibility but leaving this unchecked will become your problem in the future. This is why Todd Shupe LSU informs contractor to always deal with this issue professionally. Improper moisture condition in the wooden subfloor may result to moisture related problems in finished floor.
There are a lot more that you can learn about this from Todd Shupe LSU.