Chimney Masters Blog

A top sealing damper is a spring-loaded, gasketed lid mounted at the top of the flue and operated by a stainless cable running down to the firebox. Closed, it seals the flue against air leakage far better than a worn throat damper, cutting the stack effect that pulls conditioned air out of the house. Open, it clears the full flue opening and doubles as a rain and animal cap, which supports steady draft.

Yes. NFPA 211 calls for chimneys, fireplaces and vents to be inspected at least once a year regardless of how often they are used, because the standard ties inspection to time and condition, not to burn hours. An unused chimney still faces rain, freeze-thaw cycles, animals, masonry deterioration and liner corrosion. Low use lowers creosote buildup; it does not stop weather, wildlife or ageing.