Snow load and ice dams in Coeur d'Alene
Winter roofs here carry snow, and ice at the eaves is a heat problem as much as a shingle problem. Request quotes from independent contractors. We do not shovel roofs or open attics.
How an ice dam forms
Snow on the roof is normal in Coeur d'Alene, Hayden, Post Falls, Rathdrum, and Dalton Gardens. An ice dam is the ridge of ice at the eave that shows up when the roof deck above the heated house is warm enough to melt that snow, and the overhang, which is not over the heated room, is cold enough to freeze it again. Meltwater ponds behind the ice and can work up under shingles, then into the wall or the ceiling near the outside of the house. The U.S. Department of Energy's building-science note on eaves in cold climates describes that sequence and why a peel-and-stick membrane at the eave is a backup, not the cure.
The lasting work is usually at the ceiling: air leaks around cans, the attic hatch, and plumbing stacks; insulation that actually covers the top plates; and a soffit-to-ridge path that is not stuffed with insulation. Some newer roofs are built unvented, on purpose, with the insulation at the roof deck. Those need a different detail. A contractor who does both roofing and attic air sealing should say which assembly you have before they sell a single product.
What you can see without entering the attic
- A line of icicles or an ice bulge along the eaves, especially above the warm rooms and not above a cold garage.
- Ceiling stains within a few feet of an exterior wall after a thaw.
- Peeling paint on the fascia or a wave in the shingles at the first few courses.
Snow load
Cities in this area adopt a ground snow load for structural design. The number depends on the code cycle and the site, so this page does not print a pounds-per-square-foot figure and pretend it fits every house. What matters on a given winter day is the roof you have: depth, whether the snow is wet, and whether one side is drifted. Warning signs that warrant getting people out from underneath and asking for a professional opinion include a sagging ridge, new drywall cracks, and doors that bind when they did not last week.
Walking a snow-covered roof to shovel it is how people fall and how shingles lose their granules. Ask a contractor whether removal is warranted and how they would do it. Do not treat a forum recipe as a plan.
How this shows up in a quote
A roofing quote aimed at ice dams may include membrane at the eaves, better ventilation, and flashing repairs where water already entered. An insulation quote is sometimes a different trade. Say in the form whether you want the roof edge priced, the attic priced, or both, so the contractors who respond know which request they are answering. Related work: roof repair and roof replacement.
A national planning range, not a local price.
Published U.S. roofing cost guides in recent years commonly place many asphalt shingle replacements around $4 to $8 per square foot of roof surface installed. For an ordinary house that often lands somewhere in a wide band from roughly $6,000 to $18,000, before a steep pitch, a second tear-off, or rotted decking. Metal is often higher: many of those same guides start near $7 per square foot and run past $15 for standing-seam systems. A small repair, such as a pipe boot or a short flashing run, is often quoted in the hundreds of dollars nationally. These figures are general estimates. They are not Coeur d'Alene averages, and they are not a quote. The contractors who respond set their own prices.
Snow and ice dam questions
What causes an ice dam?
Warm air leaks into the attic, the roof deck melts snow from underneath, and the meltwater freezes again at the colder eave. Water can then back up under the shingles. U.S. Department of Energy building-science guidance describes that path and the role of air sealing, insulation, and a clear vent path. A bucket of ice melt on the shingles does not fix the heat loss.
Do heat cables solve ice dams?
Heat cables are a common add-on. They use electricity and can open a channel through ice. They do not stop warm air from reaching the roof deck. Ask a contractor whether cables are a temporary measure or whether the quote includes air sealing and insulation.
When is snow on the roof a structural concern?
A visibly sagging ridge, new cracks where the ceiling meets the wall, or doors that suddenly stick are reasons to move people out of the rooms under that area and to ask a contractor or a structural professional to look. This referral service cannot tell you that a roof is safe to stand under. Staying off the snow-covered roof is the safer default for a homeowner.