Ice dam risk in Salisbury, MD
Will your roof get ice dams in Salisbury, MD?
0.8 dam days a winter
Almost never. An ordinary house in Salisbury sees 0.8 days a winter when an ice dam can form, because snow rarely stays on a roof long enough below freezing.
Salisbury averages 8 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 Salisbury
| Attic | Dam days | Risk |
|---|---|---|
| Air-sealed and well insulated | 0.7 | 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 Salisbury than in colder towns: there are only 0.1 days a winter between a typical attic and a sealed one.
Do you need to do anything in Salisbury?
- 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.
Salisbury winter, month by month
| Month | Snow (in) | Days on ground | Dam days |
|---|---|---|---|
| January | 2.5 | 1.8 | 0.4 |
| February | 3.4 | 1.2 | 0.2 |
| March | 1.0 | 0.7 | 0.1 |
| April | 0.2 | 0.0 | 0.0 |
| December | 0.9 | 0.6 | 0.1 |
Salisbury next to nearby towns
Salisbury ranks 23 of 23 Maryland cities here for ice-dam days, behind Hagerstown at 12.1 days.
- Cambridge, MD 29 mi, 1.5 days
- Milford, DE 38 mi, 2.4 days
- Easton, MD 38 mi, 1.5 days
- Dover, DE 54 mi, 1.7 days
- Smyrna, DE 64 mi, 1.7 days
Where these numbers come from
NOAA 1991–2020 climate normals from Salisbury-Wicomico Regional Airport, 4.6 miles from Salisbury. 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.