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What to Ask a Flooring Contractor Before Work Begins

Flooring affects every room in your home, and the installation quality determines whether a beautiful floor lasts decades or starts cupping, buckling, and squeaking within a year. The single most important factor in flooring longevity isn't the material -- it's moisture management and subfloor preparation, which are invisible once the floor is down. Walk through this checklist with any contractor you're considering to verify they understand both.

10 QuestionsPrintable ChecklistAvg Cost: $1,000 - $8,000 per job

Questions to Ask

1Will you test the subfloor moisture before installation, and what method do you use?

Why It Matters

Excessive moisture in the subfloor causes hardwood to cup, laminate to buckle, and adhesive to fail. Moisture testing is the most important step in flooring installation and the one most often skipped.

Red Flag

They don't mention moisture testing, or they plan to install without testing because the floor 'feels dry.'

Pro Tip

For concrete subfloors, the calcium chloride test (ASTM F1869) or relative humidity test (ASTM F2170) should be used. For wood subfloors, a pin-type moisture meter reading below 12% is standard.

2How will you prepare the subfloor, and is leveling included in the bid?

Why It Matters

An uneven subfloor causes hollow spots, squeaking, cracking (tile), and premature wear. Most flooring requires the subfloor to be flat within 3/16 inch over 10 feet.

Red Flag

They plan to install directly over the existing subfloor without checking flatness, or leveling compound is a surprise add-on after work begins.

Pro Tip

Ask about their flatness tolerance and leveling method. Self-leveling compound is standard for concrete. Plywood overlay or grinding may be needed for wood subfloors. This should be quoted before installation day.

3What acclimation time does this flooring material need, and how should it be stored?

Why It Matters

Solid hardwood must acclimate to your home's temperature and humidity for 3-7 days before installation. LVP and laminate are more stable but still benefit from 24-48 hours of acclimation.

Red Flag

They plan to deliver and install the same day, or they store flooring in an uncontrolled environment like a garage.

Pro Tip

The flooring should be stored in the rooms where it will be installed, with the HVAC running at normal temperatures. For hardwood, ask them to check moisture content of the wood against the subfloor before starting.

4What installation method do you recommend for this material and my conditions?

Why It Matters

Nail-down, glue-down, and floating installations each have different performance characteristics. The right method depends on the material, subfloor type, and room conditions.

Red Flag

They use the same installation method for every material and subfloor type, or they can't explain why their recommended method is best for your situation.

Pro Tip

Solid hardwood over plywood subfloor: nail or staple down. Engineered hardwood: glue or float depending on subfloor. LVP: float with underlayment. Tile: thin-set on cement board. There's no single right answer.

5What underlayment will you use, and is it appropriate for this flooring over this subfloor?

Why It Matters

Underlayment provides sound dampening, moisture barrier protection, and minor leveling. The wrong underlayment can trap moisture, void flooring warranties, or create excessive cushion that damages click-lock joints.

Red Flag

They use no underlayment, or they use the cheapest foam regardless of subfloor conditions.

Pro Tip

For floating floors over concrete, a moisture-barrier underlayment is essential. For second-floor installations, acoustic underlayment reduces sound transmission. Some LVP comes with attached underlayment -- don't double up.

6How do you handle transitions between rooms and different flooring types?

Why It Matters

Transitions are the most visible part of a flooring installation. Poor transitions look cheap, create tripping hazards, and allow moisture migration between rooms.

Red Flag

They don't discuss transitions, or they plan to run flooring through doorways without transition strips where different materials or heights meet.

Pro Tip

Ask about T-molding between same-height floors, reducer strips between different heights, and whether thresholds will be flush or raised. For open-concept spaces, discuss whether continuous installation without transitions is possible.

7Do you move and replace furniture, remove existing flooring, and handle baseboard removal?

Why It Matters

These tasks add significant cost and time. Some contractors include them; many don't. Moving a houseful of furniture before installation day can be a major logistical challenge.

Red Flag

The bid doesn't specify who handles furniture moving, old flooring removal, or baseboard reinstallation.

Pro Tip

Get clarity on: who moves furniture, who removes old flooring and disposes of it, whether baseboards are removed and reinstalled or replaced, and whether the quote includes quarter round or shoe molding.

8What is the warranty on your installation, separate from the manufacturer's product warranty?

Why It Matters

If flooring buckles because of improper installation technique, the manufacturer won't cover it. You need the installer's labor warranty to be meaningful and in writing.

Red Flag

No labor warranty, or a warranty that excludes the most common installation failures like cupping, buckling, and squeaking.

Pro Tip

A one to two year installation warranty is standard. It should cover: subfloor-related failures, joint separation, squeaking, cupping or buckling related to installation technique, and transition failures.

9Can you show me a sample of the exact product before I commit?

Why It Matters

Colors look different in a showroom than in your home. Small samples don't show full pattern variation. You need to see the actual product in your actual lighting conditions.

Red Flag

They refuse to provide a sample or only show you a digital rendering.

Pro Tip

Request at least 3-4 planks or tiles to lay out in your room for 24 hours. View them in daylight and artificial light. Check for color variation across planks -- especially with natural hardwood and stone-look products.

10How long will the project take, and when can I walk on the new floor?

Why It Matters

Floating floors are walkable immediately. Glue-down and nail-down may need 24 hours. Hardwood finish needs 24-72 hours of cure time. Tile grout needs 24-48 hours. Planning around these timelines avoids damage.

Red Flag

They can't give you a timeline, or they say you can walk on a freshly finished hardwood floor the same day.

Pro Tip

Ask for a day-by-day schedule: day 1 prep and level, day 2-3 install, day 4 transitions and trim. For sand-and-refinish hardwood projects, expect 3-5 days with no access to the rooms during finishing.

Bonus Tips for Hiring a Flooring Contractor

  • Order 10% more material than the measured square footage to account for cuts, waste, and pattern matching. This also gives you replacement pieces for future repairs.
  • Run your HVAC system for at least two weeks before hardwood installation to stabilize indoor humidity levels.
  • If you're installing over a concrete slab, ask about a full-coverage moisture test, not just spot checks. Moisture levels can vary significantly across a slab.
  • Ask what happens if the flooring material has defects. A quality contractor will inspect every plank or tile before installation and set aside any pieces with defects.

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