Do You Need Moisture Barrier Under Vinyl Flooring. Moisture will not damage the vinyl flooring, but will deem the adhesive that secures the vinyl to the slab almost useless. On the other hand, if you're installing vinyl flooring over an existing floor, such as hardwood, laminate or tile, then you should lay some cork or foam down first. It may also be a requirement in certain hoa or apartment complexes to have a sound barrier with your flooring.
Sometimes the underlayment is already attached for you, but you may hear the term moisture or vapor barrier when installing laminate flooring. For any flooring that requires a floating installation method, be laminate or vinyl planks, use a 6 mils (or thicker) plastic sheet as a moisture barrier. You will need a moisture barrier underlayment when installing:
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There is a certain amount of moisture that can make its way through concrete when the ground is saturated. Moisture barrier under shed tags: In some climates, that's a huge factor in making a basement more livable. Concrete slabs are notorious for allowing moisture to come up through them.