Subfloor Prep & Floor Leveling

Prep is the least visible part of a flooring project and the part that decides whether the floor still looks right in year five. Luxury vinyl plank is thin and unforgiving of movement underneath it. Meridian LVP treats subfloor prep as its own line item with its own standards, not as something absorbed into install day.

What's included

Straightedge flatness mapping across the full install area
Self-leveling underlayment and patch compound on concrete and wood
High-spot grinding on slabs, including trowel ridges and drywall mud
Squeak elimination: screwing panels to joists, shimming, blocking
Panel replacement where water damage or delamination is present
Moisture testing on slabs before a glue-down or floating system goes in

Flatness is a measurement, not an opinion

Manufacturers publish a tolerance — commonly a maximum deviation over a set span — and warranty coverage depends on meeting it. We map the field with a long straightedge, mark highs and lows in chalk, and correct until the surface actually holds the spec. It is slower than eyeballing the room and it is the reason edges do not peak and seams do not separate.

Concrete slabs in Treasure Valley homes

Slab-on-grade construction is common in newer Meridian neighborhoods and in basements and garages-turned-living-space throughout the area. Concrete brings its own checklist: curing time on new pours, moisture behavior, surface contamination from curing compounds, and any cracking that should be treated before an underlayment goes over it.

Wood subfloors, squeaks, and seasonal movement

Idaho's dry winters and hot summers move wood framing. A panel that is not properly fastened to the joist will announce itself through a floating floor as a click or a creak, and adding LVP on top does not silence it. We fasten from above where access allows, address seam ridges, and flatten panel edges that have swelled from a past leak or an unprotected framing stage.

Prep as a standalone service

If you are installing your own LVP or hiring a separate installer, we will do prep only: mapping, grinding, leveling, patching, fastening, and a documented handoff of what was corrected and what the finished surface measures.

Subfloor Prep questions

How do I know if my floor needs leveling?: Roll a marble, look for gaps under a long straightedge, and listen for movement when you walk the room. Any noticeable rocking, visible dishing, or a gap you can slip a pencil under is worth measuring properly before flooring goes down.
Does self-leveler work under floating LVP?: Yes, when the right product is used and the surface is primed correctly for the substrate. The goal is a stable, flat plane — a floating floor still needs that even though it is not bonded to it.
Can prep be skipped to save money?: It can be reduced when the subfloor already measures well. It should not be skipped when it does not, because the cost of correcting it later includes pulling up the new floor.