I can't say there was not any problems because there was an issue with the color of the shingles on one roof. They installed shingles on two roofs for me. Cobalt has said they would correct the issue of wrong color installation. I could not be more pleased with the workmanship of the two roofing installations and the painting. I am pleased with the commitment of Cobalt to do excellent work and there flexibility to work to my schedules.