Wood Over a Concrete Slab, Glued or Floated
Hardwood Floors Ash Oxnard walks a slab job in the order it happens, from reading the moisture result to choosing glue or float and dealing with the extra height at doors, because on a slab the method matters as much as the board.
The floor as it starts
Illustration
The finished floor (illustration)
Illustration
Three routes
| Route | How | Added market cost | Feel |
|---|---|---|---|
| Glue-down | Plank glued with the maker's adhesive | +$2–$4 per sq ft | Firm and quiet |
| Floating | Planks clicked or glued to each other over underlayment | +$1–$2 per sq ft | Softer, can sound hollow |
| Plywood layer | Subfloor built on the slab, then nailed | Varies | Springy, adds height |
Moisture decides
Before any route is picked, a slab test reads how much water is moving up. The flooring maker's written limit decides what passes. A reading above the limit means a rated primer, a floating system over a retarder, or a different material.
Height, doors and the kitchen
Primer, adhesive and underlayment all add thickness. A 1/2 in. rise can rub a door, catch a threshold or leave a dishwasher short. Ask who trims doors and who pulls and resets appliances, and what each adds.
Slab in a sandy, humid city
On any slab, fine sand carried in on shoes works like sandpaper under a floating floor, so entry mats are part of the plan. A glued floor tolerates that grit better than a loose one.
Questions to put in writing
- Which moisture test, how many points and what readings?
- Which route, and why for this room?
- Who handles thresholds, doors and appliances?
- What happens if the reading comes back high?
Where this leads
- Service page: Engineered Hardwood Installation — Engineered planks over slabs and wood floors near the coast, with the moisture test and the condo sound question up front.
- Local page: Hardwood flooring in South Oxnard and Rose Avenue
- All services and typical prices: Hardwood flooring in Oxnard
- More illustrated guides: Hardwood Floor Guides
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