Ice dam risk in Gallatin, TN
How often ice dams form in Gallatin
0.8 dam days a winter
Almost never. An ordinary house in Gallatin sees 0.8 days a winter when an ice dam can form, because snow rarely stays on a roof long enough below freezing.
Gallatin averages 5 inches of snow a year and about 4 days with snow on the ground. Too little lies on the roof for long. The conditions that make a dam need all three at once: snow, cold at the eave and heat above it.
What your attic does to that number in Gallatin
| Attic | Dam days | Risk |
|---|---|---|
| Air-sealed and well insulated | 0.6 | Very unlikely |
| Typical, some insulation, not air-sealed | 0.8 | Very unlikely |
| Older or poorly insulated, warm attic | 1.0 | Very unlikely |
The attic matters less in Gallatin than in colder towns: there are only 0.2 days a winter between a typical attic and a sealed one.
Do you need to do anything in Gallatin?
- Nothing for ice dams. If you are buying here and an inspector mentions water at the eaves, ask what they saw: it is far more likely a gutter, flashing or drip-edge problem than ice.
Snowy places are not always the worst: why snowfall misleads.
Gallatin winter, month by month
| Month | Snow (in) | Days on ground | Dam days |
|---|---|---|---|
| January | 2.3 | 1.9 | 0.4 |
| February | 1.5 | 1.4 | 0.3 |
| March | 0.3 | 0.3 | 0.0 |
| December | 0.5 | 0.4 | 0.1 |
Gallatin next to nearby towns
Gallatin ranks 8 of 65 Tennessee cities here for ice-dam days, behind Crossville at 2.6 days.
- Hendersonville, TN 9 mi, 0.1 days
- White House, TN 13 mi, 0.6 days
- Mount Juliet, TN 13 mi, 0.4 days
- Goodlettsville, TN 14 mi, 0.1 days
- Lebanon, TN 14 mi, 0.2 days
Where these numbers come from
NOAA 1991–2020 climate normals from Bethpage 1 S, 9.6 miles from Gallatin. A dam day is a day with snow on the roof and freezing at the eave while heat or sun melts the snow above it. This describes a normal winter, not this one.