Flooring · Service

Flooring installation, starting under the floor

The material you pick gets all the attention. What decides whether the floor still looks right in five years is the subfloor underneath it — and that is the line item cheap bids quietly delete.

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In short

What is flooring installation?

Flooring installation is the process of removing old floor covering, preparing and correcting the subfloor beneath it, and fitting new material using the method that material requires — nailed, glued, floating or set in mortar. Most of the visible work takes two to five days in an average home. Most of the failures trace back to the invisible part: a subfloor that was not flat, not dry, or not fixed.

Triggers

Signs you need flooring installation

Boards are cupping, crowning or gapping seasonally — the floor is reacting to moisture it should not be seeing
You can feel dips or ridges walking barefoot across a room, or furniture rocks in one spot
Seams have opened up in sheet vinyl or laminate, or planks have separated at the ends
The floor squeaks in the same places every time, which usually means fasteners have lost their grip on the subfloor
You are opening up rooms and want one continuous floor instead of four different ones meeting at thresholds
A leak, a pet, or a burst supply line has left staining or soft spots you cannot sand or clean out
The existing floor is at the end of its wear layer — laminate cannot be refinished, and vinyl cannot be recoated

Seeing something not on this list? Browse flooring problems by symptom →

The job

How flooring installation actually works

Site measure and layout planning

A real measure is not a square-footage number. The installer records room dimensions, doorway widths, where transitions land, which direction the joists run, and which way the boards should run to look right from the main sightline.

Watch for: A quote produced from a phone call and a square-footage figure you supplied. Waste factor, layout direction and transition count all change the price, and none of them are knowable remotely.
Moisture testing — before anything is ordered

Concrete slabs get tested for moisture emission; wood subfloors get a meter reading compared against the moisture content of the flooring itself. Manufacturers set the acceptable numbers, and warranties are written against them.

Watch for: Nobody producing a meter. This is the single most common skipped step, and it is the one that voids warranties. If a slab is wet and a moisture barrier or mitigation coating is not in the quote, the failure is already scheduled.
Removal and disposal of the old floor

Old covering comes up, along with tack strip, staples, adhesive residue or thinset. Disposal volume matters — tile and mortar bed removal fills a dumpster far faster than carpet does.

Watch for: Adhesive or backing that predates the late 1980s. Some old resilient tile and its black cutback adhesive can contain asbestos, and the correct answer is testing before disturbance, not sanding it off and hoping.
Subfloor assessment and correction

This is the step that separates a good installation from a cheap one. Loose panels get refastened, soft or water-damaged sections get cut out and replaced, and high or low spots get ground down or filled with levelling compound to the flatness tolerance the material requires.

Watch for: Levelling compound priced as an "if needed" allowance with no number attached. Ask what flatness tolerance the manufacturer specifies and how the installer will verify it — a straightedge on the floor is a fair thing to ask to see.
Acclimation, where the material calls for it

Solid and engineered wood are delivered and left in the space so their moisture content settles toward the room. The room needs to be at normal living temperature and humidity for that to mean anything.

Watch for: Material delivered and installed the same day in an unconditioned house. Acclimating boards in a garage or against an exterior wall in an unheated build is worse than not acclimating at all.
Installation by the method the material requires

Nail-down for solid wood over joists, glue-down for engineered over slab, floating with click-lock for laminate and most vinyl plank, and thinset over a rigid backer or membrane for tile. Each has its own expansion, underlayment and fastener rules.

Watch for: Floating floors run tight to the wall. They must have an expansion gap at every fixed obstruction, including door jambs and kitchen islands. A floating floor pinned at one edge will buckle, and it will happen the first humid week.
Transitions, trim and thresholds

Where the new floor meets a different material, a doorway or a stair nosing, a transition piece is fitted. Baseboard is either reinstalled, replaced, or shoe moulding is added to cover the expansion gap.

Watch for: Transition count missing from the quote. They are individually small and collectively the most common surprise line item, especially in homes with many small rooms.
Walkthrough and cure time

You should walk the floor in daylight looking down the length of the boards, not straight down at your feet. Glued installations and tile grout have cure times before heavy furniture or rugs go back.

Watch for: Being handed the room the same hour the last plank goes in on a glue-down job. Ask specifically how long before furniture, and how long before area rugs — rugs trap moisture in a curing adhesive.

Money

What does flooring installation cost?

Installed flooring commonly lands somewhere between $4 and $20 per square foot all-in, with material choice, subfloor correction and removal of the old floor driving most of the spread. Subfloor work is the line item that moves quotes most. See the Cost Guide for a proper breakdown.

See the full flooring installation cost guide — by material, size and region →

Straight answer

When flooring installation is the wrong call

Everyone else ranking for this is paid when you say yes. Here's when you shouldn't.

You have an active moisture source you have not fixed. A failed grade slope, a leaking dishwasher supply, or a crawl space with no vapour barrier will destroy a new floor. Fix the water first; the floor is the last thing that should go in, not the first.
Your existing hardwood still has wear layer left. If there is enough thickness above the tongue to sand, refinishing costs a fraction of replacement and keeps material that is often better than what you can buy now. Have it measured before you tear it out.
You are installing over a subfloor you cannot inspect. Laying new flooring on top of two existing layers to avoid removal cost hides everything — soft spots, fastener failure, mould. It also raises the floor height enough to cause door and appliance problems.
Structural work, plumbing or a kitchen is still to come. Flooring goes in near the end. Installing before cabinets, or before a pipe is rerouted, means paying to cut into it or patch it later with material that will never quite match.
You want one material everywhere and one of the rooms is a wet room. Continuity is a real design goal, but a full bathroom or laundry with a floor drain has requirements a continuous plank floor may not meet. Break the run there rather than compromise the room.
You are selling in the next few months and only need it to show well. A professional clean, a recoat, or replacing carpet in the two worst rooms usually returns more than a whole-house installation you will not live on.

Your options

Types of flooring installation

Material guides

Hardwood, engineered, laminate, vinyl plank, tile, stone, carpet, bamboo and cork — what each is actually good at.

Head-to-head comparisons

Hardwood vs LVP, laminate vs LVP, engineered vs solid, tile vs LVP, and refinish vs replace.

Layout and pattern guides

Straight lay, diagonal, herringbone and chevron — pattern changes labour and waste, not just looks.

Underlayment and trim

Underlayment, transitions, mouldings and how baseboard is handled at the edges.

Compare flooring options side by side →

Straight answer

Can I do this myself?

Reasonable to DIY

Pulling up old carpet, pad and tack strip — dirty, slow, and genuinely straightforward
Removing baseboard carefully with a pry bar and shim if you intend to reuse it
Renting a moisture meter and taking your own readings on a wood subfloor before you get quotes
Installing a click-lock floating floor in a single, square, low-traffic room with no thresholds to speak of

Call a licensed pro

Anything that needs the subfloor made flat — levelling compound is unforgiving and a bad pour has to be ground back out
Nail-down solid hardwood, which needs a flooring nailer, correct rack-and-stack layout, and an accurate starting line
Tile over any framed floor, where deflection, backer board and membrane choice decide whether the grout cracks
Glue-down over concrete, where the wrong adhesive or an untested slab fails invisibly and completely
Anything where a pre-1990 resilient floor or its adhesive needs to come up — get it tested first

Before you sign

What to check when hiring for flooring installation

How will you test the subfloor for moisture, and will you show me the readings?

The reading is the warranty. Ask for it in writing on the paperwork, not verbally on the day.
What flatness tolerance does this material specify, and is levelling included or an allowance?

Every manufacturer publishes a tolerance. If the installer cannot quote yours, they are not reading the instructions the warranty depends on.
Is removal and disposal of the existing floor in this price?

Tile and mortar-bed removal is heavy, slow work with real disposal cost. It is frequently excluded and then added.
How many transition pieces does this job need, and are they in the quote?

Cheap quotes tend to be transition-blind. In a house with many doorways this is a meaningful number.
Who is actually doing the work — your employees or a subcontracted crew?

Perfectly normal either way, but you want to know who to call in year two and whether the labour warranty follows them.
Will doors need trimming, and who does it?

A floor build-up of even a few millimetres can stop interior doors closing. Someone has to own that, and it is better decided now.
What is the labour warranty, in years, and what voids it?

Material warranties come from the manufacturer and are usually the easy part. Installation warranties are where the real exposure sits.

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Local pros

Flooring Installation near you

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Related work

Often done at the same time

Subfloor Repair

When the layer underneath is the problem

Floor Leveling

Getting flat before anything goes down

Floor Removal

Tear-out and disposal as its own job

Floor Refinishing

The cheaper answer when the wood is still good

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FAQ

Flooring Installation — questions people ask

Still have a question? Talk to our team →

How long does a whole-house flooring installation take?

For an average home, plan on two to five working days of installation once material is on site. Add time for acclimation of wood products, for subfloor repairs discovered after the old floor comes up, and for cure time on glue-down or tile work. Tile is the slowest — setting and grouting are separate days with drying in between.

Can new flooring go over the existing floor?

Sometimes, and it is legitimately cheaper. Floating floors can often go over sound vinyl or tile. But it raises floor height, which affects doors, appliances under counters and stair riser heights, and it means nobody looks at the subfloor. Going over a second existing layer is where it stops being a reasonable shortcut.

Do I have to move my own furniture?

Ask, because it is priced both ways. Many installers will move standard furniture and exclude anything requiring disconnection — appliances, pianos, aquariums, wall-mounted electronics. Clarify who disconnects and reconnects a gas range or a washing machine before the day, since that is often a separate trade.

What does acclimation actually mean and does every floor need it?

It means letting the flooring sit in the room where it will live so its moisture content moves toward equilibrium with that space. Solid and engineered wood need it. Most vinyl plank needs only a short temperature acclimation. Laminate sits in between. The room has to be at normal living conditions for it to count — an unheated house does nothing useful.

Why do quotes for the same job vary so much?

Usually the prep. Two quotes for the same square footage can differ by thousands because one includes subfloor levelling, removal and disposal, transitions and door trimming, and the other treats them as allowances to be added later. Compare scope line by line before you compare the totals.

Should the floor run in a particular direction?

Conventionally boards run parallel to the longest wall or toward the main light source, and on a framed floor they should run perpendicular to the joists for support. Perpendicular-to-joists is the structural rule and it wins when the two conflict — otherwise the joist lines telegraph through over time.