I think you are getting bad advice all around - who has shown you that the vinyl floor will be warrantied once installed over existing engineered wood flooring? A big no no right from the start.

Have you considered the impact of adding vinyl flooring over your existing hardwood flooring and possibly over your stair treads on the rise of each step in your stairs? You don’t want to inadvertently create a tripping hazard with unequal step rises or have rises after installation that are not to code.

if there is a significant mismatch with the restained wood stairs and vinyl flooring, consider installing a stair runner.

LVP can typically be installed over engineered wood flooring without a problem, including a warranty problem.

We painted our stair treads black, along with spindles and railing and left the risers white. We were dubious at first but it looks amazing.

Anyone installing gray plastic flooring needs a wakeup call as to how much they are ruining their house. Gray is way dead, gray vinyl is horribly cheesy, and sealing in moisture on existing wood floors is not good for them.

Discard this plan, ASAP.

IMO gray works for everything I own and I do not think it is dated if it works with everything you own. The vinyl can be problematic on stairs and I think the black treads white riser might be the perfect answer. Maybe even a runner on the painted treads. I think we need to see your space to really help.

Please, no past season discount bin gray floors. If you have wood floors already, it is head and shoulders above vinyl in both looks and the value it brings to your home.

This site worships at the altar of hardwood and ignores the many problems that hardwood can have. We bought our house in 2016 and already replaced the hardwood twice. A strong storm blew open a door and our refrigerator ice maker decided to dispense a bit of ice onto the floor while we were on vacation.

Meanwhile, the LVP that I put in the area my dogs stay in has held up beautifully through far worse. So this last time I put in LVP. We could not be any more pleased with it.

I would be nervous that adding LVP on the stairs would change the rise/run of the stairs which I think is pretty standard in terms of what is comfortable for humans

Agree with @bry911 you can paint them to ease the transition - (SW has an additive to make them less slippery if they are steep or you’re worried about it) or you could add a runner that has grey tones from the new floor to meld the two

FWIW we painted our stairs a dark blue grey years ago as a temporary measure and have kept it bc I love the less formal look

Bry911 Vinyl will inhibit moisture to evaporate and become entrapped within wood allowing it to swell and fail. If it fails, then the vinyl plank will fail to. Just not good practice. And I can’t name one reputable manufacturer that has it in writing that this is an acceptable installation - LVP has its place just make sure the subfloor is properly prepped.

I can’t name one reputable manufacturer that has it in writing that this is an acceptable installation - LVP has its place just make sure the subfloor is properly prepped.

Shaw Floorte - Flooring can be installed over most existing hard–surface floor coverings, provided that the existing floor surface is fully adhered, clean, flat dry structurally sound and free of deflection.

Lifeproof LVP - APPROVED SUBFLOORS Concrete, Plywood, OSB, Particleboard, Chipboard, Hardwood (Solid, Engineered, Parquet), Tile (Ceramic, Terrazzo, Stone, Asbestos, Peel and Stick), Non-Cushion Sheet Vinyl, Metal, VCT, DRIcore

Smartcore Ultra - Flooring can be installed over most existing hard–surface floor coverings, provided that the existing floor surface is fully adhered, clean, flat, dry, structurally sound and free of deflection.

Coretec - Acceptable Subfloor Types: • CDX Underlayment Grade Plywood (at least ½” thick) • Underlayment Grade Particleboard • OSB (at least ¾” thick) • Existing Wood or Laminate Floor • Resilient Tile • Concrete Slab • Ceramic Tile • Non-Cushioned Sheet Vinyl

Karndean - Types of subfloor • Timber Floors: These should be solid with minimal flexibility. All loose boards must be firmly fastened, gaps filled and undulations removed. Where necessary, overlay floorboards with flooring grade plywood or similar underlay. • Woodblock/Parquet Floors: Make sure these floors are solid and fix any loose or broken areas. Wood block floors laid direct to earth/bitumen/pitch must be removed prior to installation

Mohawk - These vinyl flooring products can be installed directly over most existing floor coverings, EXCLUDING carpet (including needle felt), floating laminate, floating floor systems, lauan and cushioned vinyl flooring.

Does SJ ever comment about floors anymore? The LVP products with a click lock have been failing miserably when installed over anything but a smooth solid floor. The click lock can not stand any deviations that allow movement. I have seen failure after failure and once you’re past the year for labor warranty (if your installer has even guaranteed you one) you are up a creek. The pros here do NOT recommend this practice.

No one who has ever dealt with the (inevitable) failure of vinyl over wood would ever recommend it. It will always get thrown back onto the installer as well. NO manufacturer support when it predictably fails. Even gluedown is not a good idea over any finished floor, other than full glued sheet vinyl that is fully adhered, with no problems other than ugly.

The LVP products with a click lock have been failing miserably when installed over anything but a smooth solid floor. The click lock can not stand any deviations that allow movement.

Can you please support this? Click lock flooring is far more likely to fail in deflection and there isn't an acceptable installation of LVP where the underlying finished floor wouldn't reduce deflection.

@DeWayne are you Verbo? Seriously... "Even gluedown is not a good idea over any finished floor." Which manufacturer allows a vinyl floor to be glued down to a finished wood floor? I suspect that would be against acceptable installation standards for most products.

I have consulted for flooring pros here in Indiana for the past 8 years and they will not install over existing as they are seeing failures after a few years in. Do I have their denied claims from the manufacturers - no. I just know that the reputable contractors here who want to walk away and know they won’t be called back for any failures just won’t do it. They loose jobs all the time to some that will.

Keep the wood and refinish it. Not gray. It will cost less than the work needed for plastic floors.