Gaps Between Flue Tiles — A chimney’s purpose is to safely vent hazardous flue gases (from the combustion process) from your home that can contain creosote/soot, carbon monoxide and corrosive chemicals. Flue tiles are typically sealed with mortar to keep these gases within the flue. But over time, the mixture of heat, moisture and chemicals will erode the mortar, leaving gaps or voids
between flue tiles.
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