All Interlock personnel we dealt with were personable, courteous and professional. The installer (whose name I don’t recall) was a very able, diligent and hard worker. When he had helpers onsite – primarily for stripping the old shake and asphalt roof materials – they also worked well and without loud music or coarse language. Also, our contact at Interlock’s office (Shawna) was courteous and helpful – even to lending us the heavy material display panel from the showroom to take home for a weekend AND helping me load it in my car! We’ve had positive comments from neighbors and from passers-by when we’re outside. One of the more interesting was, “We loved the look of your old cedar shake roof and were afraid what you might be replacing it with, but it looks great – good choice”!