Every February we get the same call. Water dripping from a light fixture, an ice glacier on the eave, a homeowner who's tried everything and is one freeze-thaw cycle from a basement leak. Here's the truth about ice dams in Sioux Falls: they have three causes, and most homeowners only fix one.
The three causes, in order of severity
- 1Warm attic (50% of the problem). Roof heat melts snow from below, the meltwater hits the cold eave overhang, refreezes.
- 2Choked attic ventilation (30%). Even a well-insulated attic builds up heat with no intake/ridge airflow.
- 3Clogged gutters (20%). Debris in the trough refreezes and creates the initial dam point.
The fixes, ranked by cost-effectiveness
1. Gutter cleaning (cheapest, partial fix)
Clean gutters can't dam at the trough. Schedule a late-October clean. $135–$295 per visit in the Sioux Falls market.
2. Vented aluminum soffit (mid-cost, real fix)
If your soffit is solid (no perforation) or wood, you're choking attic intake. Continuous perforated aluminum soffit is the structural fix for cause #2. $13–$24/ft installed. Bundle with new gutters for a discount.
3. Heat cable (mid-cost, symptom manager)
Self-regulating cable installed in a zigzag pattern at the roof edge plus straight runs in gutters and downspouts. It keeps water moving so it doesn't refreeze on the eave. $11–$18/ft installed. Not a root-cause fix, but the most cost-effective way to manage a chronic problem roof.
4. Attic insulation upgrade (highest cost, biggest impact)
If your attic is below R-30 of insulation, this is where the real fix lives. R-60 (about 18" of cellulose or fiberglass) is the South Dakota target. $1.50–$3.00/sqft of attic floor. We don't do insulation — we'll point you to who does.
5. Ice dam steam removal (emergency only)
If you have an active dam right now, low-pressure 280° steam is the only safe removal method. Rock salt, hammers, and high-pressure water all strip granules off your shingles and shorten roof life. We do this from January through March; $375 minimum for a same-day visit.
What we recommend
For a chronic ice-dam home: install heat cable in the fall, schedule attic insulation work for summer, then add vented aluminum soffit when you're due for trim work. All three together, you stop fighting February water for good.
Run your risk score
We built a free 90-second tool that scores your home's ice-dam risk based on insulation, ventilation, cleaning frequency, and roof pitch. It also tells you which fix to start with.
Ready for your own answer?
