Breaking News
Home >> 101 Questions Series >> 101 Vinyl Flooring >> Should I Use A Vapor Barrier On A Wood Sub Floor When Installing Vinyl Plank Flooring?
Installing Vinyl Plank Flooring

Should I Use A Vapor Barrier On A Wood Sub Floor When Installing Vinyl Plank Flooring?

Should I use a vapor barrier on a wood sub-floor when installing vinyl plank flooring? We get this question a lot! It is not required, but we recommend using the Visqueen Vapor Barrier with all vinyl plank flooring installations.

The Visqueen acts as a barrier between the flooring and the sub floor, and allows the vinyl planks to float above the sub floor, and smoothly expand and contract with the temperature and humidity changes in your home. This is also an extra piece of protection if you have any water leaking underneath the vinyl planks. Vinyl is waterproof, however, if water is unable to escape under the planks, you could see mold and mildew begin to form. We see this happen often with sliding glass and patio doors!

Most manufacturers of the vinyl planks flooring will request installation of Visqueen PE film underlayment, so make sure to read manufacturer installation rules and requirements before installing your floor to avoid any potential problems.

Learn more about preparing your subfloor, and get a step-by-step guide to installing you vinyl flooring here.

About Bestlaminate

Bestlaminate’s blog is dedicated to you by making the home improvement process easier and more affordable. We hope to make your home remodeling and maintaining a more positive experience.

Check Also

Do I need to glue vinyl flooring?

We get asked a lot if you need to glue vinyl flooring down. What many …

Can I install laminate flooring over vinyl flooring?

Many homeowners ask whether or not they can install laminate flooring over vinyl flooring. The short …

Is laminate flooring the same as vinyl flooring?

Is laminate flooring the same as vinyl flooring? We get this question asked a lot. …


  1. Hi. Our subfloor in master’s bedroom is wood but under that wood is concrete. Do we still need underlayment for that?.. We do have long cabinet but not a wardrobe and i think is quite heavy. What is the best vinyl to use?

    • Ashley Tolfo

      Hi Jamila – If you are installing any floating floor, you should install underlayment regardless of the type of subfloor you have. Underlayment is important for floating floors because it provides cushioning, joint integrity, noise dampening properties, and allows for the flooring to expand and contract properly. Even though vinyl flooring is not a wood flooring, it still expands and contracts and you still have to leave expansion gaps when installing it as a floating floor.

      I would recommend choosing Perfect Mat LVT or Floor Muffler LVT for your underlayment. Both are mildew and mold resistant, so they will not develop any should there be any moisture that forms and transfers onto your wood subfloor. Concrete is a porous floor so there is a chance that your wood subfloor may develop mold or mildew, which could then transfer to your vinyl flooring. Having an underlayment with mold and mildew blocking properties will prevent this from ruining your new flooring.

      If you are installing a non-movable cabinet in your master bedroom, you should install the cabinet first before installing the flooring – similar to the way you would install kitchen cabinets. You would then install your flooring around the cabinet, leaving an expansion gap around the cabinet’s base. If this is a movable cabinet or dresser, you should consider a 5mm + thick vinyl or a WPC + vinyl and put felt cushions on the bottoms of the feet of the cabinet/dresser to help distribute the weight so it does not dent your vinyl.

      I know this is a lot of information, but I hope it helps you! If you have any more questions, please reply to this comment or send us an email at If you are interested in any of the floors, we offer free samples so you can see them for yourself in person! Give us a call 1-800-520-0961 and we will be happy to help you!

Leave a Reply

Your email address will not be published. Required fields are marked *