Why your concrete quote must specify PSI in writing-and what to ask if it doesn't
The PSI gap costs you 8 years
A driveway needs 4,000 PSI minimum. Sidewalk concrete runs 3,000 PSI. Same price on the quote? You're getting sidewalk durability under driveway traffic. That 1,000 PSI difference shaves roughly 8 years off a 25–30 year lifespan. One line in writing prevents this swap. Most contractors list it. The ones who don't are either cutting corners or haven't thought it through-neither is your problem to solve.
What to ask your contractor
- "What PSI are you specifying for this job?" (Driveway: 4,000 minimum. Patio: 3,500–4,000. Sidewalk: 3,000.)
- "Can you add that to the written quote?" If they hesitate, that's a flag.
- "Will the concrete mix meet those specs when tested?" A yes means they stand behind it.
- Ask for the batch ticket after the pour-it shows actual PSI from the supplier.
PSI specs by concrete surface
| Surface | Minimum PSI | Typical lifespan |
|---|---|---|
| Driveway | 4,000 | 25–30 years |
| Patio | 3,500–4,000 | 20–25 years |
| Sidewalk | 3,000 | 20+ years |
| Garage floor | 4,000 | 25–30 years |
Getting the right concrete mix on paper is only the first step-knowing how to evaluate every other line item on a quote separates smart buyers from overpayers.
one-click price evaluation
Check if your quote is fair - before you sign.
- Real $/sqft ranges for your project type and region
- PSI, thickness & base depth benchmarks to check the spec
- One-page negotiation reference card
How it works
- Pull up your quote
- Check it against the regional data and spec benchmarks
- See exactly where you're overpaying
Done in 30 seconds.