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Insulation in Gatlinburg: July highs average about 85°F; January lows average about 28°F; the typical home was built around 1997 (25% before 1980).
In Sevier County, July highs average about 85°F and January lows about 28°F, with roughly 57 inches of rain a year.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, flash floods and hailstorms in Sevier County, with hail up to 1.75 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
The typical home in Sevier County was built around 1997, about 29 years ago, and 25% were built before 1980.
Sevier County has had 15 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Winter Storm (2026).
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Uneven rooms, high bills and an attic you can see the joists in are the signs; older homes often have far too little.
Attic insulation and air-sealing usually pay back fastest.
These are Sevier County figures — more about homes in Sevierville.
Pittman Center · Pigeon Forge · Sevierville · Townsend · Dandridge · Newport · Baneberry · New Market