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What kinds of flue lining are best, and do all chimneys need to be lined?

April 26, 2017best chimneys flue lined Lining

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What kinds of flue lining are best, and do all chimneys need to be lined?

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Stainless steel has the most endurance, as acid tends to deteriorate concrete and mortar over time. Chimneys that have outside walls almost always have to be lined, as they are much colder than inside chimneys. The hotter the chimney, the faster the air will rise.