A concrete patio is a major investment—typically $3,000 to $12,000 depending on size and finish—so hiring the wrong contractor can cost you thousands in repairs or a poorly finished surface that cracks within a year. The difference between a patio that lasts 30 years and one that fails in five often comes down to the installer's experience, base preparation, and concrete mix choices. Before signing a contract, you need to know exactly what you're paying for and who you're trusting with your backyard.
Ask About Their Experience With Similar Projects
Don't settle for a general contractor who "does concrete." Ask specifically how many residential patios they've installed in the last three years, and request photos of completed work in your climate zone. Concrete performs differently in freeze-thaw regions versus warm climates, so experience matters.
A concrete patio contractor should be able to show you:
- Patios they've built at least 5+ years ago (proving longevity)
- Examples of their finish options (stamped, stained, broom-finished, etc.)
- Before-and-after photos of site preparation and final product
- References from at least two homeowners you can contact directly
Ask how they handle climate-specific challenges. If you live somewhere with winter freeze cycles, they should explain air-entrainment additives and proper drainage—not gloss over it.
Verify Licensing and Insurance
This is non-negotiable. Ask to see their:
- General contractor license (or appropriate state/local licensing for concrete specialists)
- Workers' compensation insurance (protects you if someone gets hurt on your property)
- General liability insurance with a minimum of $1 million coverage
Call their insurance provider to verify active coverage. A contractor who waves this off or seems evasive is a red flag.
Understand the Base Preparation Process
Most patio failures stem from poor base preparation, not the concrete itself. Ask detailed questions:
- How many inches of gravel or crushed stone will they lay down? (Standard is 4-6 inches)
- Will they compact the base, and with what equipment?
- How do they handle drainage? (Your patio should slope 1/8 inch per foot away from your house)
- What if they hit poor soil—what's their plan to address it?
A contractor who rushes this or gives vague answers is cutting corners. Expect this phase to take 1-2 days for a standard 16x20 patio.
Get Details on Concrete Mix and Finishing
Ask what concrete mix they're using and why. Standard concrete for patios is typically 4,000 PSI (pounds per square inch), but some contractors use stronger mixes in freeze-thaw climates. They should explain their choice.
Discuss finishing options and costs:
- Broom finish: Basic, slip-resistant, included in most quotes
- Stamped or decorative: Adds $8-15 per square foot
- Stained concrete: Adds $3-10 per square foot
- Sealing: $1-3 per square foot; ask if it's included or extra, and how often it needs reapplication
Ask about their curing process. They should explain how long you need to stay off the patio (typically 7 days for light traffic, 28 days for full use) and whether they'll protect it from rain during that time.
Clarify the Timeline and Payment Terms
A typical 400-square-foot patio takes 2-4 days to install (not counting the 28-day curing period). Ask:
- When can they start, and how long will the job take?
- Will weather delays affect the timeline?
- What's their payment schedule? (Avoid upfront payment of more than 50%)
- Do they offer a warranty, and what does it cover? (2-5 years is standard)
Never pay the full amount before work begins. A typical arrangement is 50% deposit, 50% upon completion.
Get Everything in Writing
Request a detailed written estimate that includes:
- Square footage and measurements
- Concrete specifications (mix, thickness, PSI rating)
- Base preparation details
- Finish type and any special treatments
- Timeline and payment schedule
- Warranty terms
If they only provide a verbal quote or a vague estimate, move on.
Frequently Asked Questions
Q: How long does a concrete patio actually last? A: A well-installed concrete patio with proper maintenance typically lasts 25-30 years, though in freeze-thaw climates it may be closer to 15-20 years without proper air-entrainment and sealing.
Q: Should I seal my new concrete patio, and when? A: Yes—wait 28 days after installation, then apply a quality sealer every 2-3 years to protect against moisture, staining, and UV damage, which significantly extends lifespan.
Q: What causes concrete patio cracks, and are they covered under warranty? A: Hairline cracks are normal and often cosmetic, but larger cracks (wider than 1/4 inch) usually result from poor base preparation or concrete mix issues and should be covered under a contractor's warranty.
Use platforms like Mercoly to compare multiple concrete patio installers in your area, read verified reviews, and get competing estimates—this makes spotting a quality contractor much easier.