Jon brings a lot of experience and integrity. He alerted us to the need to not mix types of exhaust vents on the roof (i.e. powered roof vent with ridge vents and gable vents). In doing more research as a result of that, I learned a lot and was surprised at how little other roofers knew or were willing to discuss. We ended up going with a different roofer when we had our roof replaced, but am regretting the decision. Now during the actual roof replacement, the costs of additional repairs to replace plywood sheating, trim pieces, etc from this other roofer are extremely high. In Jon’s contract, he spelled out the costs including labor to do this additional type of work.