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Friday, August 01, 2014

Question

I have a recently laid granite floor which is appearing as if it has dampness in it and water marks. It is polished and can not be take up or relaid. Please advise. It is located in a dry climate and high foot taffic area.


Answer

Granite is absorbent and porous so it could be moisture from the installation, from the slab or below, or from cleaning if it is not sealed with an impregnating sealer. It could also be oil or stains from something oily that was used to clean or spot the floor. It's also possible that water or moisture is coming from above or below the floor or slab from a leaky pipe or roof. Even in a dry climate such as a desert, there is still some moisture in the air and this may be the source of the apparent dampness. Tough to tell what's going on without being able to see and inspect the floor properly? Some sort of matting should be used to protect against tracking in soil, moisture and slip-and-fall incidents. A stone-flooring inspector may be able to assist you via email or phone. Visit: www.iicrc.org or www.marble-institute.com for a list of certified stone inspectors.
Lynn E. Krafft, ICAN/ATEX Associate Editor
lekrafft@juno.com