Ask what happens if the first diagnosis is wrong. A straight answer names the next test instead of adding a second vague price.
A useful page about what is North Bay Rubber Surfacing names the job, the constraint, and https://talonshieldsnorthbayepox470164.tribunablog.com/what-cement-flooring-includes-and-what-it-does-not-for-an-older-unit-58397211