The floor comfort underlayment is to be used with laminate or engineered wood NOT LVT or LVP.
Go with the Smartcore and approved underlayment. I have used that brand and had great results. Better to use products matched to each other.
Answer from RMDman on Stack ExchangeJonapanels
jonapanels.com › guide-to-choosing-underlayment-for-vinyl-plank-flooring
Choosing Underlayment for Vinyl Plank Flooring: Your Ultimate Guide! - Jona Panel Sales Inc.
March 11, 2024 - The type of subfloor you have will also influence the underlayment material you choose. Here are some underlayment recommendations for different subfloor types: – Felt underlayment: Suitable for concrete subfloors with good moisture resistance.
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The floor comfort underlayment is to be used with laminate or engineered wood NOT LVT or LVP.
Go with the Smartcore and approved underlayment. I have used that brand and had great results. Better to use products matched to each other.
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I'd use a 1/4" notched trowel with some stiff thinset mix. Trowel it on your floor surface leave the notches standing. Once stiff enough I'd fill the voids and flat trowel against the notches. This will bring your floor up the 1/4". A bathroom floor is so small and area it isn't that much work to bring it up 1/4".
Don't use another layer of underlayment, you can get too much deflection in the click lock system and break the tongues.
Underlayment under vinyl plank (on concrete floor)?
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January 17, 2024Best basement floor underlayment for use with luxury vinyl planks? - RedFlagDeals.com Forums
Hi Everyone, I am having my basement finished and the concrete floor will be levelled in a couple of weeks as there are some low spots. I will be purchasing luxury vinyl planks from Costco most likely and they will be 5mm thick with a 1.5mm thick underpad on the back for a total advertised thickness of 6.5mm. I'd like to add a vapour barrier and some sort of additional underlayment ... More on forums.redflagdeals.com
Underlayment - vapor + insulation + cushion? - DoItYourself.com Community Forums
Vinyl and Linoleum Flooring - Underlayment - vapor + insulation + cushion? - I'm redoing the floor in a ground floor room. Once I remove the old tile, I'll be down to concrete slab. Old baseboards have been removed and new baseboards haven't been installed, so I have some room for a decent ... More on doityourself.com
flooring - I bought LVT do I need underlayment and a vapor barrier on concrete floor - Home Improvement Stack Exchange
The installer is trying to lay the lvt on an uneven concrete floor. What is the best way to prepare the concrete floor for the LVT? More on diy.stackexchange.com
Videos
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What Is The Best Underlayment For Vinyl Flooring? - CountyOffice.org ...
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The Best Underlayment for Vinyl Flooring - YouTube
LVP Flooring Installation Over Concrete Subfloor - Full ...
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If Your Vinyl Plank has Attached Pad | Do You NEED More Pad? - YouTube
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Vinyl Plank Flooring: Best Underlayment Options for Noise Reduction ...
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Installing Vinyl Plank Flooring on Concrete in our Barn - YouTube
Panel Town
paneltown.com › home › the right underlayment for vinyl flooring makes all the difference
The Right Underlayment for Vinyl Flooring Makes All the Difference - Panel Town & Floors
If you don’t want to be bogged down by the details of what you can and can’t use but desire a quick solution that also offers the best results possible, go with Whisper Step. ... Whisper Step serves as a Class II moisture retardant, so it’s ...
Published October 15, 2024
Reddit
reddit.com › r/phoenix › underlayment under vinyl plank (on concrete floor)?
r/phoenix on Reddit: Underlayment under vinyl plank (on concrete floor)?
January 17, 2024 -
Considering installing vinyl plank flooring after having to remove the carpet due to a plumbing issue. I know lvp has underlayment already but have seen arguments for and against adding underlayment on a concrete floor. Thoughts? Also, is vinyl plank really that much better an option than laminate?
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You probably don’t need another underlayment but may need a vapor barrier. We installed LVP (well, paid for it to be installed) 4 years ago. Started buckling after 2. LVP company and installers said it was due to windows and light and wouldn’t warranty it. Tore it out and found all kinds of moisture underneath due to a lack of a vapor barrier. Fwiw, we now have tile and are much happier.
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I would ask r/DIY I bet you’ll get more activity there
RedFlagDeals
forums.redflagdeals.com › best-basement-floor-underlayment-use-luxury-vinyl-planks-2491337
Best basement floor underlayment for use with luxury vinyl planks? - RedFlagDeals.com Forums
April 18, 2022 - Since it ultimately is a floating floor, it may feel spongy in places if the concrete is 100% level, but when it is, it feels great and cool, not cold on the feet even in winter. Between your options, my vote is option #2. ... I bought the technoflex for underlayment for my basement floor.
Houzz
houzz.com › discussions › 3579992 › best-underlay-for-luxury-vinyl-tile
Best underlay for Luxury Vinyl tile?
The rest allow "nothing" (plywood or concrete are your options). Other products allow an underlay specifically designed for vinyl. It is thin (1.2mm - 3mm) and is non-compressible. Vinyl planks can NOT have "squishy"...they must have rigid. ... High end = 2mm - 3mm ($1.50/sf) available to flooring ...
Floor & Decor
flooranddecor.com › blogs › the-best-underlayment-for-every-type-of-flooring.html
The Best Underlayment for Every Type of Flooring | Floor & Decor Blog
June 13, 2025 - A thin foam underlayment made of polyethylene or polypropylene usually works best. If you have an attached pad laminate or vinyl floor, our recommendation is the Sentinel Protect Plus Underlayment.
Lowe's
lowes.com › home › diy projects & ideas › buying guides › flooring
The Complete Guide to Floor Underlayment
July 14, 2025 - Cork Underlayment: Cork is an excellent choice for areas prone to mold and mildew. It is soft, compressible and performs well in both hot and cold environments. Cork is ideal for basements or other concrete-floor applications.
Décosurfaces
decosurfaces.com › en › blog › article › 127-choose-underlayment-vinyl-flooring-concrete-installation.html
What Underlayment To Choose for Vinyl Flooring on Concrete?
If you don't know the health of your foundation, (how it was built, or what type of concrete was used) it's best to use underlayment. Laying vinyl directly on concrete exposes you to greater risks. This is where underlayment comes in, playing a vital role in the performance of your vinyl floor, ...
Mersey Flooring
merseyflooring.co.uk › flooring suppliers › news › what underlay is required for installing vinyl on a concrete floor
What Underlay is Required For Installing Vinyl on a Concrete Floor – Mersey Flooring
Durable and dense rubber underlay is typically used for installing vinyl flooring over concrete.
Walmart
walmart.com › home improvement
Best Underlayment For Vinyl Plank Flooring
3in1 Vapor Barrier Flooring Underlayment w/Overlap and pre-Attached Tape Strip - Bestlaminate- 2mm - 500sq.ft (Bundle 5 Rolls Each 100 sg.ft.) QuietWalk LV 100 Sq ft Acoustical Underlayment with Vapor Barrier for Luxury Vinyl Flooring
The Home Depot
homedepot.com › flooring › flooring supplies › surface prep › underlayment
Best Rated - Underlayment - The Home Depot
Get free shipping on qualified Best Rated Underlayment products or Buy Online Pick Up in Store today in the Flooring Department.
KCBR Design
kcbathremodel.com › blog › what-do-you-put-under-vinyl-flooring-in-a-basement-kansas-city
What Do You Put Under Vinyl Flooring in a Basement?
October 15, 2024 - Walking on vinyl flooring can be noisy, especially in echo-prone basements. Underlayment materials like cork or felt can help absorb sound, making your basement quieter and more comfortable.
DoItYourself.com
doityourself.com › doityourself.com community forums › interior flooring, floor coverings and coatings center › vinyl and linoleum flooring › underlayment - vapor + insulation + cushion?
Underlayment - vapor + insulation + cushion? - DoItYourself.com Community Forums
February 14, 2021 - So they've got a floating floor on a floating subfloor. Wonder how that holds up over time. ... Alright, so I decided to keep it simple and skip the extra insulation. Just concrete slab + a good underlayment + LifeProof vinyl planks.
Bob Vila
bobvila.com › reviews › the best underlayments for vinyl plank flooring
The Best Underlayments for Vinyl Plank Flooring
May 28, 2024 - Concrete subfloors are very hard, so they require additional cushioning from soft underlayments made from foam, felt, or cork. When choosing an underlayment for vinyl plank flooring on concrete, it’s best to pick an option that provides heat insulation and moisture regulation.
TITAN FLOORING INC.
titanfloors.ca › best-underlayment-for-vinyl-flooring
Best Underlayment for Vinyl Flooring: Top 7 Picks and Tips
January 2, 2025 - Think of moisture barriers like a raincoat for your floor – they prevent water from sneaking up through your subfloor and causing expensive damage to your beautiful new vinyl planks. Foam underlayment provides excellent moisture protection ...
MP Global Products
mpglobalproducts.com › home › best underlayment for laminate flooring on concrete
Best Underlayment For Laminate Flooring On Concrete
Installing underlayment for laminate flooring can help reduce the sound from traveling to other rooms. This also helps make your floor sound like real hardwood and not laminate. The extra material sandwiched between the flooring and subfloor helps reduce vibrations transmistted from room to room. Condo associations like to meet certain sound ratings when tenants install new flooring. Moisture Protection – Our recycled fibers allows over concrete to “breathe” – managing vapors from becoming bulk moisture.
Published June 6, 2025
Bestlaminate.com
bestlaminate.com › home › accessories › underlayment
Shop Premium LVP Underlayment at Bestlaminate
It’s a smart upgrade when installing LVP, SPC or WPC planks in rooms where you want a firm feel, quieter steps, and light subfloor protection—all without messing with the structure of your floor. Whether you’re renovating a home office, finishing a basement, or upgrading a spare room into a gym, this underlayment gives you the performance you need—without overcomplicating your project. Use the Room Calculator to determine how much vinyl underlayment you’ll need for your project! Protect against subfloor moisture: Install vinyl confidently in basements, offices, or utility rooms over concrete subfloor without worrying about moisture from the subfloor.
Azadcarpetsandfurniture
azadcarpetsandfurniture.co.uk › azad carpets & furniture › flooring › which underlay is needed for vinyl installation on concrete floors?
Best Underlay for Vinyl on Concrete Floors: A Complete Guide
November 27, 2024 - Find the perfect underlay for vinyl flooring on concrete. Learn about Rubber, Foam and felt padding options to ensure a smooth and durable installation.