Ice dam risk in Centerville, OH
Will your roof get ice dams in Centerville, OH?
5.7 dam days a winter
Moderate risk. On an ordinary house in Centerville, conditions for an ice dam come on about 5.7 days in a normal winter, mostly in January and February.
Centerville averages 12 inches of snow a year and about 22 days with snow on the ground. Most of it comes and goes within a few days. 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 Centerville
| Attic | Dam days | Risk |
|---|---|---|
| Air-sealed and well insulated | 3.2 | Low |
| Typical, some insulation, not air-sealed | 5.7 | Moderate |
| Older or poorly insulated, warm attic | 8.7 | Moderate |
Sealing and insulating a typical attic takes out about 2.4 days a winter here. It drops the risk from moderate to low.
Preventing ice dams on a Centerville roof
- Air-seal the attic floor: the gaps around the hatch, light fixtures, plumbing stacks and the top plates of interior walls. This is the fix that removes the cause, and it usually costs less than a season of contractor ice removal.
Which to spend on first: air sealing or heat cable.
Centerville winter, month by month
| Month | Snow (in) | Days on ground | Dam days |
|---|---|---|---|
| January | 6.9 | 9.4 | 2.8 |
| February | 1.5 | 5.1 | 1.3 |
| March | 1.7 | 1.8 | 0.3 |
| November | 0.1 | 0.1 | 0.0 |
| December | 2.1 | 5.3 | 1.3 |
Centerville next to nearby towns
Centerville ranks 158 of 176 Ohio cities here for ice-dam days, behind Euclid at 24.8 days.
- Kettering, OH 4 mi, 5.7 days
- West Carrollton, OH 6 mi, 5.7 days
- Miamisburg, OH 7 mi, 5.7 days
- Springboro, OH 7 mi, 5.7 days
- Beavercreek, OH 8 mi, 5.7 days
Where these numbers come from
NOAA 1991–2020 climate normals from Dayton Mcd, 10.5 miles from Centerville. 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.