Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
BCM
User Panel

Posted: 9/6/2023 4:46:46 PM EST
I’ll be laying LVP on a wooden subfloor, which is above a conditioned crawl space. Carpeting was pulled up, and there was no other flooring on it but carpet. I believe the subfloor is 3/4” plywood.

I’ve been trying to find out if I need to put down 1/4” plywood over it, staggering the joints, or just put down some type of rolled-out underlayment or vapor barrier.  And I see both recommended doing some web searches.

Anyone have any experience with this? I’ve dragged a 4’ level across the floor, looking for ridges or dips, and didn’t find any with the exception of a couple seams that I power-sanded.
Link Posted: 9/6/2023 5:36:10 PM EST
[#1]
We put down about 1800 sq ft about 2 yrs ago and started with sanding all the seams on existing flooring, just cuz. Underlayment of 3/8” particleboard then the LVP.

You’re going to be better off with 3/8 vs 1/4 I believe. Ours is flat as glass throughout. We like it.
Link Posted: 9/6/2023 7:05:07 PM EST
[#2]
I have hurricane floor where the subfloor is 1x12 pine boards with 3/4" plywood over top. Most places had 3/4 MDF which got tore up removing the staples from the padding. I sanded those spot flat and laid 1/4" over top. My house has a crawl space and I haven't had any issues with the Mohawk LVP flooring I put down 4 years ago.
Link Posted: 9/9/2023 10:32:30 AM EST
[#3]
You might check with the manufacturer.   Their recommendations vary and may also vary by the specific product.
Link Posted: 9/9/2023 2:45:59 PM EST
[#4]
I just did a 5x8 bathroom with 7mm LVP (higher-end Stainmaster from Lowe’s)

The previous flooring was sheet vinyl over 1/2” plywood underlayment, over 3/4” plywood subfloor. (This was part of a full bathroom reno down the studs),

Tore up the vinyl and 1/2” ply underlayment. Inspected subfloor, did not need to level. After plumbing, electrical, drywall finished, laid 1/4” (5mm actual) luan leaving 1/4” expansions gaps. I did not have seams to stagger in such a small space. 7/8” crown staples every 6”
Close Join Our Mail List to Stay Up To Date! Win a FREE Membership!

Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!

You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.


By signing up you agree to our User Agreement. *Must have a registered ARFCOM account to win.
Top Top