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Written By Thurman Schinner

Meaning, if you?re going to install vinyl plank flooring over tile, vinyl flooring, and even hardwood. As with the plywood floor, there?s no need to worry about a moisture barrier; the underlayment should provide cushioning and sound-deadening benefits.
What happens if you don?t put underlayment under vinyl plank flooring?
Vinyl planks require hard, thin underlay because the product itself is softer. Putting a soft product under vinyl plank will result in an unstable floor that is much more inclined to being damaged and even punctured or torn over time.
Do you need a vapor barrier under a floating floor?
All laminate flooring requires an underlayment to allow the floor to float and give the locking system its strength. You will need a moisture barrier underlayment when installing: On a cement subfloor. On any subfloor that has a chance of moisture coming up and soaking into the flooring.
Can mold grow under vinyl plank flooring?
Although vinyl floors are resistant to moisture, mold and mildew can grow if there is standing water around the edges, grooves or under the floor.

Do you need underlayment for vinyl plank on concrete?
The key to installing luxury vinyl over concrete is to ensure the floor is level and clean. Underlayment isn?t a necessity, but you might consider it to add noise reducing qualities or additional softness to the product. If the concrete is uneven, you will have to level it out.
What should you not use on vinyl plank flooring?

Use highly-abrasive scrubbers. Abrasive sponges, steel wool, and other rough materials can easily scratch ? and even eat through ? the protective coating atop your vinyl plank flooring.
Use ammonia.
Use paste wax or solvent-based polishes.

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What should I put under vinyl flooring?
The rule of thumb is any vinyl over 4mm can have a vinyl specific underlayment. With thinner vinyl flooring construction, adding a foam underlayment can effect the locking system strength. Vinyl floors under 4mm should be installed right over the subfloor.

Is a vapor barrier necessary?
A vapour barrier is an important component in building construction. Its purpose is to help prevent water vapour from reaching building walls, ceilings, attics, crawlspaces or roofs, where it can condense and cause building materials to rot or grow mould.
Do I need moisture barrier and underlayment?
Mostly concrete subfloors transmit moisture. Concrete is porous and allows moisture to pass through to your basement/room level. If the amount is more than what your underlayment can handle, then yes you will need a moisture barrier. If it doesn?t exceed the amount, then the underlayment can handle the job.
What is the black stuff under the vinyl floor?
So, removing old linoleum or vinyl flooring may come as a surprise to some homeowners when they see smears of some type of black adhesive between the tiles and the subfloor. This is often called black mastic and it often contains asbestos.
What if water gets under vinyl plank flooring?
If the floor is flooded you may need remove the vinyl planks from the floor to assess the problem and the damage. Use your Shop Vac or a mop to pull up the floodwater quickly and begin running dehumidifiers and fans immediately. Then call your installer.
Can you put vinyl plank directly on concrete?
Yes, luxury vinyl tiles (LVT) can be installed over concrete provided you follow the correct installation procedure.
Can you put a vapor barrier over concrete?
You?ll typically need a vapor barrier if you?re installing flooring over concrete. Therefore, because concrete is porous, it?s a good idea to install a vapor barrier over your concrete subfloor before installing your flooring.
What are the problems with vinyl plank flooring?
Problems related to vinyl plank flooring include being prone to discoloration, stains, scratches, peeling, cracking, and crumbling at the edges. There are also certain installation-related failures that you need to watch out for. These include curling, warping, peaking, and mold and mildew.

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