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://north-bay-rubber-surfaci969696.kisa-blog.com/871955/north-bay-flooring-contractor-cost-what-the-details-actually-say-for-an-older-unit