Creosote, the black or brown residue of combustion that collects around the internal surfaces of a chimney flue liner, is highly flammable. If allowed to Construct up, it could possibly capture fire, leading to cracks in "fireproof" brick, stone or clay flue liners and permit heat to succeed in nearby wood https://hectorsribo.webdesign96.com/28573992/not-known-factual-statements-about-chimney-inspection