When it comes to tile installation, moisture protection is a major concern. If the amount of moisture present in the subfloor exceeds what the bottom layer can withstand, then a moisture barrier is necessary. However, if the moisture level is within the capacity of the bottom layer, then it can do the job. There are several types of tile subfloor, all of which serve to even out the surface and create a layer that does not flex underfoot.
Without it, even a slight movement of the subfloor can cause grout lines to crumble and tiles to crack. If you have a 4.0 mm “floating” LVT tile floor (FreeFit) installed on a concrete floor (basement), you may need to stick it everywhere after the edges of some of the boards were not flat. Once the floor is installed, the vapor barrier underneath will not be damaged over time as it is not stepped on or exposed to other elements.When installing vinyl flooring over an existing subfloor, such as tile or linoleum, you can use a base coat for added cushioning and reduced sound. To install vinyl floors over wooden subfloors, you won't have to worry about a moisture barrier, but you may want a base layer for added cushioning or sound reduction.
Therefore, when trying to find the right barrier, it's important to talk to a sales representative or flooring professional, or review the manufacturer's guidelines for the floor.In conclusion, if your subfloor has excessive moisture levels, then you will need to use a moisture barrier for your tile installation. However, if the moisture level is within what the bottom layer can withstand, then you don't need one. Additionally, if you want an additional sound barrier or cushioning layer, you can use Tranquility Ultra and Tranquility LVT base layers.
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