A few chimney sweep Web sites list certified sweeps by state. Experience is number one. Reputable sweeps will put down tarps in front of the hearth and have a high-powered vacuum to suck up any soot. Finally, call the Better Business Bureau to see if any complaints have been filed against the company. What to expect When a sweep arrives at your home, he will examine your chimney for loose bricks, cracks in the mortar and structural integrity.
Some sweeps can fix structural problems.
Others will refer you to someone who can. Some sweeps will wait for the chimney to be repaired before cleaning it. Most important, the sweep will make sure there is a cap on the chimney. It's like not having a roof on your house. The very top of the chimney is the weakest part of the structure.