Subfloor question for SuperCore LVP...please help

5 years ago

We will be installing SuperCore LVP in our finished basement in the bathroom and walk-in closet. Old tile was removed from the bathroom and closet area and we are down to bumpy concrete subfloor. I read the instruction on the We Ship Floor website but I am still confused.

Can we glue down OSB to the concrete and install the LVP on the OSB? This is what we did on our upper level but our subfloor was wood - not concrete.

What is the proper procedure for this situation?

TYSM!!

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Comments (5)

SJ McCarthy
5 years ago
No...don't do glue down wood over concrete. Please don't. It just isn't worth it.

Do your CONCRETE and your home the RIGHT process = grind/shot blast and LEVEL it. Pouring concrete over lumpy concrete = normal for basement installs. Totally and completely normal.

If you want a nasty, gooey, sweaty, moldy mess then go ahead and glue wood to concrete.

Quick question: how OLD is the house? When was it built? Photos of lumpy-bumpy concrete.
Rory (Zone 6b) thanked SJ McCarthy
Rory (Zone 6b)
Original Author
5 years ago
Thx SJ!!

Looks like DriCore is the product that I should use. Are you familiar with this product as a subfloor over concrete?
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SJ McCarthy
5 years ago
Yep. You still need to be careful with the flatness rating of the Dricore. You will spend +++time into setting the shims under the Dricore.
Rory (Zone 6b) thanked SJ McCarthy
Rory (Zone 6b)
Original Author
5 years ago
The house was built in 1971.

This room is now going to be a closet with a pocket door into the bathroom and that's the concrete floor that the DriCore and LVP will go over.

This is the floor in the old bathroom. Leveling compound has been put down but I don't have pictures of that step. The pocket door now connects the closet to the bathroom. This entire area will have LVP.
PRO
GN Builders L.L.C
5 years ago
What SJM said you have to prep the floor properly.

If you look at DriCore installation specs, it tells you that "Any dips or low spots in the concrete surface greater than 1/4" should be troweled level with a Portland cement compound or leveled with a self-leveling compound to ensure an accurate installation."

The same goes for LVP flooring

"A. The surface of the subfloor must be flat. The flatness requirement is defined as follows: the maximum difference between two high points and the intermediate low point is 1/4" in a 10' radius. Surface flatness must also not vary more than 1/16" when measured with a 3' straight edge. Additionally, the subfloor must not slope more than 1" in 6'.

B. High areas can be sanded, ground down, or floated over with an approved self-leveling compound. Fill excessive voids or low areas using a non-gypsum, cementitious-based leveling compound. Allow the leveling compound to dry thoroughly before beginning the LifeProof Vinyl Plank installation. Follow the manufacturer’s instructions to be sure it is appropriate for the application.

Good luck
Rory (Zone 6b) thanked GN Builders L.L.C