
Laminate can go over all types of subflooring, including concrete. However, installers must take one important step. They need to prevent moisture from seeping up through the concrete. This helps avoid problems with the laminate. Installers need to put in a high-quality moisture barrier to ensure there will be no problems with the flooring. If there is no moisture barrier, the laminate flooring may absorb moisture and swell up. A swollen laminate floor is a big problem and can cause planks to crown, cup, gap, and more.
If a proper moisture barrier is put in place between the concrete and the laminate, there should be no reason to worry about moisture being an issue. In fact, the protection that the moisture barrier provides is enough to keep the laminate looking as good as new for a long time.

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