well after a long cold winter my husband looked up the chimney. he discovered lots of black junk coated all through out the chimney. we decided to get the chimney all cleaed out before next winter, we dont want to run a chance of having a chimney fire.the company came out, properly sealed up the fireplace so that when they do the sweep none of the black ashes will go through out he house. it took the man not too long at all to get the job done. we were very pleased with the work he did.