J. L. Contractor Services was at the higher end of estimates of the work, but I went with them anyhow, because the owner, Jack, seemed to know more about attic ventilation, and consider it to be a more important issue, than did the other companies I got quotes from. I wanted better attic ventilation as the house is old and has no soffits. Jack wa very responsive to all my questions both while I was deciding who to hire and after I'd chosen him. The crew laid extensive tarps to protect my house and the neighbors' houses They did as I asked and took special precautions to not damage a neighbor's roof. The work seemed to go well and was finished in a few days with no interruptions. Despite the precautions, some liquid materials used in the work did get dropped on the porch and on a skylight. When I let Jack know, he sent over Joe, who seems to be a kind of project manager, to clean up. The clean-up job was very satisfactory.