Why the box count always runs over the room size
Buy exactly the square footage of the room and you will be short. The offcut at the end of a row is usually the wrong length to start the next one, planks have to be staggered so seams do not line up, and every row that meets a wall at an angle throws away a wedge. A plain rectangle with the planks running the long way loses around five percent. Break the floor into a hallway, a closet and a bump-out and it is eight. Lay it on a diagonal or in herringbone and every plank gets cut at both ends, offcuts are almost never reusable, and twelve percent is the floor rather than the ceiling.
On top of that, keep a box. Flooring is dyed and printed in batches, and a box bought a year later under the same product name is frequently a shade off. That spare box is what lets you swap the plank the refrigerator gouges without redoing the room. The waste allowance here covers cutting; the spare box is a separate decision, and it belongs on the order.
The line items that separate two bids
When quotes on the same room differ by a factor of two, the material is rarely the cause. It is scope.
| Line item | Typical range | Why it varies |
|---|---|---|
| Tear-out and disposal | $0.50-3 / sq ft | Carpet and pad lift in minutes. Glued vinyl tile and nailed hardwood are scraping work, and the dumpster is charged by weight. |
| Subfloor leveling | $1-3 / sq ft | Only known after the old floor is off. Floating floors telegraph every dip as a hollow spot underfoot. |
| Baseboard | $3-6 / linear ft fitted | New flooring rarely lines up with the old base. Shoe molding is the cheap way out. |
| Transitions | $25-60 each | One at every doorway, at the top of stairs and wherever the material changes. |
| Door undercutting | $20-50 per door | Thicker flooring means doors that drag. The door comes off, gets trimmed and goes back. |
| Moving furniture | $1-2 / sq ft or hourly | Some installers only quote empty rooms. Ask before you assume. |
Ask each bidder which of those six they have included. Two bids that both include everything usually land within fifteen percent of each other, and at that point you are choosing an installer rather than a price.
Which materials go where
Moisture is the deciding factor far more often than looks. Sheet vinyl and luxury vinyl handle standing water; laminate does not, because its core is compressed fiberboard and a swollen seam never flattens again. Solid hardwood does not belong below grade or over a slab that has not been tested for vapor drive, and engineered wood exists largely to solve that problem. If you have small children, a dog, or a laundry room upstairs, that consideration should outrank the wear-layer marketing.
Underfoot warmth runs roughly the opposite direction. Anything floating over a foam pad feels warmer and quieter than the same product glued down, and a thick pad under laminate is what stops the hollow click as you walk. If radiant heat is in the slab, check the product's maximum surface temperature before you buy: it is a real limit and exceeding it voids the warranty.
What you can lay yourself and what you should not
Click-together floating floors — most LVP and all laminate — are the realistic DIY job. The tools are a utility knife or a miter saw, a tapping block, a pull bar, spacers and knee pads, and a bedroom takes a day. The time does not go into the open field, which moves fast. It goes into door casings, pipe penetrations and the last ripped row, and those three are most of the work.
Glue-down and nail-down installations are a different proposition. Get the adhesive coverage or the open time wrong and the floor lifts, and the only repair is pulling it back up. Nailed hardwood needs a rented flooring nailer, a compressor, and a first row that is dead straight or the error compounds across the room. Sheet vinyl looks easy and is not: cutting one large piece around casings without a template is where most self-installed sheet vinyl goes wrong.
Sequencing with the rest of the work
Flooring goes in late. Paint the walls first, because cutting in above a finished floor is slower and riskier than the reverse, and hang wallpaper before the floor for the same reason. If you are counting materials for those, the paint calculator and the wallpaper calculator handle the quantities. For the flooring itself, this page prices the job; the flooring calculator is the takeoff — it works out how many boxes, where the last row lands, how much underlayment and how many transition strips, which is what you want in hand at the store. Tile in a bathroom or entry follows different waste and setting rules and lives on the tile calculator.
One habit worth adopting before any of this: measure each room separately and add the areas, rather than measuring the outside of the house and subtracting. Closets, bump-outs and the space under a floating vanity are exactly the places where a floor plan and a tape measure disagree, and the tape wins.
Questions people ask
What does flooring installation cost per square foot, all in?
For click-together LVP or laminate in an empty room over a sound subfloor, $5 to $9 per square foot installed is a common landing zone once material, labor, baseboard and tear-out are all inside the number. Engineered hardwood is more often $9 to $15, and solid hardwood nailed and finished on site runs higher again. Those bands are wide because labor is regional and because a small job carries a minimum charge: a 100 square foot bathroom can cost the same in labor as a 250 square foot bedroom. Use the bands to sanity-check a bid, not to negotiate with one.
Where do I find the coverage per box?
It is printed on the end of the carton and on the product page, usually as square feet per carton. If only the plank size and the count are given, multiply: a 7 by 48 inch plank is 336 square inches, divided by 144 gives 2.33 square feet, and ten of them make 23.3 square feet per box. Beware that some listings quote nominal plank width including the tongue, which overstates coverage slightly. The carton figure is the one to trust.
Can I put new flooring over the old floor?
Over sheet vinyl or well-adhered vinyl tile, floating floors frequently go down without removal, and skipping tear-out saves both the labor and the disposal fee. Over carpet, never. What you lose is height: the floor rises by the thickness of the new material plus any pad, which means doors that drag, a step up at every transition and appliances that no longer slide under a counter. If the old floor is cupped, loose, or hiding a moisture problem, covering it hides the problem too, and it comes back through the seams of the new floor within a couple of years.
Do I have to move out while it is installed?
Not usually, but working around occupancy costs money. Installers who work room by room have to shuttle furniture, which adds labor and stretches the schedule, and some quote empty rooms only. If the job coincides with a move, the cheapest window is the days between closing and the truck arriving. Finishes that cure in place, such as site-finished hardwood, are a different matter: those need the room unused for days and ventilation while the finish gasses off.
How much extra material should I keep?
One full box for a room, two for a whole floor. Store it flat and indoors, not on edge in a garage where humidity swings will cup it. The point is not the material cost, it is the batch. Planks from the same run match; the same SKU bought later often does not, and a single replacement plank that is a half-shade off is visible from across the room in daylight.