Dealing with a concrete subfloor means that installers need to figure out how to control the moisture that will inevitably be a part of the job. There are definitely a few things that flooring installers should know about water vapor emissions on a concrete subfloor.
People without experience in dealing with concrete subfloors may overlook or inadequately prepare for moisture, especially water vapor emissions. Even professionals struggle with installing flooring on concrete, especially glue-down options. Flooring materials have improved over time. They can now slow or reduce the off gassing of moisture vapor from concrete. However, moisture vapor still causes problems. Even the most experienced installation crews continue to deal with it.
Too much moisture can damage flooring installed over a subfloor. It can cause warping. It can also lead to swelling. Moisture can damage the material itself. It can also create conditions for mold growth. Adhesives can lose their hold and cause planks and tiles to curl and bubble. Even after several years of installation with no problems, water vapor emissions can suddenly start to cause a problem.
The best way to deal with water vapor emissions on a concrete subfloor is to carefully test for moisture before installation to get a good idea of the conditions in a variety of settings. Letting the concrete cure for the appropriate time is another good way of reducing the risk. Of course, an appropriate moisture barrier needs to be utilized as well.
When all the right steps are taken to address water vapor emissions on a concrete subfloor, the flooring will have a reduced risk of seeing problems with moisture.
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