Flooring glossary
Plain-English definitions of 0 flooring terms you will see on quotes and inspection reports.
- 0Terms defined
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Find the word. Read the definition. Check the bid.
Wear layer - the protective top layer on engineered wood and vinyl. It decides how long the floor survives and, for engineered wood, whether it can be sanded at all. Acclimation - leaving material in the room at normal living conditions before install so it stops moving afterward; the NWFA installation guidelines address jobsite conditions and acclimation for wood floors.
Expansion gap - the deliberate space left between the floor and the walls, hidden by baseboard. Without it, floating floors peak and buckle. Lippage - one board or tile sitting higher than its neighbor. Small amounts are normal; you feel it with a bare foot before you see it.
Subfloor - the structural sheet material over the joists. Underlayment - the layer between subfloor and finish floor, budgeted at roughly $3.40-$5.30 per square foot for carpet and laminate systems. Vapor barrier - a moisture layer, commonly about $100-$150 per room for vinyl over a slab.
Dye lot - the production batch. Two boxes of the same product from different lots can differ visibly. Transition strip - the trim between two flooring materials at a doorway, $10-$40 each. Screen and recoat - light abrasion plus a new finish coat at about $1-$2.50 per square foot, as opposed to a full sand and refinish at $3-$8.
Three rules for every term
- Ask for wear layer as a number Marketing names for wear layers mean nothing across brands. The measurement does.
- Look for 'expansion gap' on the quote Its absence from an install spec for a floating floor is a warning sign.
- Ask what lippage tolerance they work to A contractor who has an answer has thought about flatness. One who hasn't, hasn't.
A-Z flooring dictionary
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Glossary terms for this industry are being written.
Where related figures come from
Sources last checked
- Fixr - Hardwood Floor Refinishing Cost (recoat versus refinish pricing) · retrieved 2026-07-26
- Fixr - Vinyl Plank Flooring Cost (vapor barrier, transitions) · retrieved 2026-07-26
- Bob Vila - Flooring Installation Cost (underlayment) · retrieved 2026-07-26
- NWFA - Installation Guidelines (acclimation) · retrieved 2026-07-26
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