You should have your chimney routinely swept to prevent fires and damage to your home. A clean chimney can also assist the combustion process of the the fuel that you burn and help in reducing the emissions produced and make your appliance work more efficiently. Cleaning eliminates the build up of soot and clears blockages eg. tar deposits, bird and vermin nests or to diagnose problems within the chimney structure. The average cost of a chimney fire is over £25,300 according to HWFR.