Flooring industry glossary
Plain-English definitions of the terms flooring contractors use every day — what they mean, when they matter, and how to handle them on the job.
Letting flooring material sit in the install environment for 48-72 hours before installation so the material's moisture content matches the room.
A thin layer installed between the subfloor and the finish flooring for cushioning, sound dampening, or moisture protection.
The structural floor surface — plywood, OSB, or concrete slab — that supports the underlayment and finish flooring.
A moisture-impermeable membrane installed between a damp subfloor (usually concrete slab) and the finish flooring.
The percentage of water in a wood product or subfloor, measured with a pin or pinless meter.
A pourable cement-based compound used to level out an uneven subfloor before finish flooring installation.
A trim piece that bridges two different flooring surfaces or covers an expansion gap between rooms.
The 1/4"-1/2" perimeter gap left between flooring and walls/cabinets to allow seasonal expansion and contraction.
Multi-layer waterproof vinyl flooring made to look like hardwood. Click-lock or glue-down install.
A rigid-core LVP construction made with limestone powder for extra dimensional stability.
A rigid-core LVP construction with a foamed wood-and-plastic composite core for a softer feel underfoot.
The transparent topmost layer of LVP, measured in mils. Determines scratch resistance and warranty length.
A tongue-and-groove plank profile that snaps together without nails, glue, or fasteners.
Hardwood flooring made of a real wood veneer over a plywood or HDF core. More dimensionally stable than solid hardwood.
Hardwood flooring milled from a single piece of wood. Nail-down install over plywood subfloor only.
The top layer of finished hardwood on an engineered plank. Thickness in mm determines refinish potential.
A high-density ceramic tile fired at very high temperature. Suitable for floors, walls, and outdoor applications.
The cushioning layer installed under broadloom carpet. Pad density and thickness affect feel, lifespan, and warranty.
Carpet sold in wide rolls (typically 12 ft) and cut to fit the room.
Modular carpet sold in 18" or 24" squares. Installed with releasable adhesive for easy replacement.
Quarter-round, shoe molding, and baseboard that hide the expansion gap and finish the perimeter.
Catch-all term for T-moldings, reducers, thresholds, end caps, and stair nosings used at flooring boundaries.
A thin wood strip with angled pins, nailed or glued around the perimeter to grip stretched carpet.
Customer service calls after install to fix a problem — the largest hidden cost in any flooring business.
The end-of-job walkthrough list of small fixes a customer wants completed before final payment.
A signed amendment to an estimate or contract that documents mid-job scope changes and price adjustments.
An upfront payment collected before install to secure scheduling and cover material costs.
A formal price quote for a flooring project, listing materials, labor, tax, and total cost.
The customer-facing bill issued at install completion, requesting final payment.
The contractually agreed window between invoice issuance and payment due (e.g. Net 14, Net 30).
Direct bank-to-bank payment via the Automated Clearing House network. Cheaper than card payments.
A signed document where the contractor waives the right to file a mechanic's lien on the customer's property in exchange for payment.
The prime contractor on a construction project. Hires and pays specialty trades (including flooring).
A document proving the contractor's liability and workers' comp insurance, often required before crew access.
A polyethylene mat installed beneath tile to absorb subfloor movement and prevent cracked tile/grout.
Cement-based adhesive used to bond tile to a substrate. Modified or unmodified, depending on the install.
Cement-based filler installed between tile joints. Sanded (wider joints) or unsanded (narrow joints).
The bullnose-shaped trim piece installed on the leading edge of a stair tread.
Removal and disposal of existing flooring before new install can begin.
A retail-style display space where customers can see and feel flooring samples before buying.