If the soot has a matte black finish and the scratch is 1/8 in. deep or less, its a DIY job. But if the buildup is deeper or has a shiny, tar-like appearance, you have heavy creosote buildup.

The firebox itself can be a point of concern and contribute to failure, so Campbell’s experts examine the firebox and fireplace for gaps and cracks, excessive soot, and missing or broken bricks.

By Karen Youso, Star Tribune, Minneapolis Jan 12, 2008 Jan 12, 2008Updated Apr 22, 2014 0 ...