Cold-climate specialty · 6 NE states
An ice dam doesn’t start at the eave — it starts in the attic. Heat escaping through ceiling penetrations melts snow on the warm upper roof; meltwater refreezes at the cold overhang; ice builds up; water backs under the shingles. The roofer who sells you a new roof without fixing the attic will sell you another new roof in 12 years.
GAF Master Elite · CertainTeed SELECT ShingleMaster · Owens Corning Platinum · Lifetime Workmanship Warranty
Root cause, not symptom
Every ice dam tells you something about the attic. A continuous ridge of ice across the entire eave usually means uniformly poor attic insulation. A localized dam over a single window or beneath a skylight tells you exactly where warm air is escaping. An ice dam directly above a bathroom vent tells you the vent is dumping moist warm air into the attic instead of the outside. The roof is the messenger; the attic is the message.
We treat ice dam work in two layers. The emergency layer is removing the existing ice, stopping active intrusion, and tarping or temporarily sealing any compromised areas. The permanent layer is the part most roofers skip — sealing attic penetrations, balancing intake and exhaust ventilation, upgrading insulation to R-49 or better, and retrofitting ice-and-water shield up to 6 feet from the eave so the next storm doesn’t reach your drywall.
Foam-sealed top plates, light fixtures, plumbing penetrations, attic hatches. Most of the heat loss responsible for ice dams comes through these small openings, not through insulation R-value alone.
1 sq ft of net free area per 150 sq ft of attic floor, split roughly 50/50 between soffit intake and ridge exhaust. A ridge vent with insufficient soffit intake is worse than no ridge vent at all.
Blown cellulose or blown fiberglass to current MA / VT energy code minimum, deeper in colder zones. Existing insulation often settles to half its rated R-value within a decade.
When re-roofing or doing significant remediation, we extend ice-and-water shield to 36 inches up from the eave at minimum — 6 feet on low-pitch sections. Past code, past the typical 24-inch industry default, past where the dam can reach.
Self-regulating heat cables along eaves and through gutters for stubborn problem areas — typically valleys, north-facing slopes that never melt, or roofs where attic remediation isn’t possible (cathedral ceilings, finished attics). UL-listed, properly relay-controlled, not residential extension-cord plug-ins.
Snow guards above entries and walkways for tile and metal roofs. Roof-rake recommendations and pull lengths customized to your home. Sometimes the simplest fix is reducing the snow load before it has a chance to freeze.
How we work
STEP 01
Infrared thermal imaging from inside the attic. Visible-light photo documentation from outside. We identify exactly where heat is escaping and where ice will form.
STEP 02
Itemized scope: air-sealing, ventilation, insulation, ice-shield retrofit, and (if warranted) heat-cable system. Each line item has its own price so you can phase the work if needed.
STEP 03
Air-sealing and insulation: any season. Ventilation: any season. Ice-and-water retrofit: requires re-roofing the affected slope — usually spring/summer/fall. Heat cables: install before winter.
STEP 04
We come back the following winter to verify performance. If a dam forms in an area we worked on, we make it right.
The four ice-dam questions
Question 01
In most homes, yes. Air-sealing penetrations + balanced ventilation + R-49 insulation will reduce or eliminate dam formation in subsequent winters. Cathedral ceilings + steep low-eave geometries are the exceptions where heat cables are also needed.
Question 02
Yes — steam removal only. We never use hammers, chemicals, or pressure washers. Steam lifts ice off the shingles without scarring granules. Sodium chloride pucks degrade asphalt; we don’t use them either.
Question 03
Both — depending on use. As targeted backup for cathedral sections or north-facing problem slopes where attic remediation isn’t possible: real solution. As substitute for fixing attic issues: band-aid. We recommend them in specific contexts, not as default.
Question 04
Full attic remediation: $2,800–$6,500. Heat-cable systems for 2-3 problem eaves: $1,400–$3,500. Ice-and-water shield retrofit during a replacement: 5–8% over base. Compare to interior damage from one ignored winter: $4,000–$25,000.
After the remediation
“Fifteen winters of ice dams. They sealed the attic in October. Zero dams since. The other quotes were all about heat cables — those would have been a $200/winter electricity bill forever without fixing the actual problem.”
J. Pickering · Brattleboro, VT
Attic remediation · 2023
“Cathedral ceiling section was always the problem area. They installed UL-listed heat cables on the right circuit. Three winters in, no ice intrusion. Operating cost about $80/winter — much less than they estimated.”
M. Saito · Concord, NH
Heat cable install · 2022
“Tarped + steam-removed during an active storm at 6 AM. Came back in May for full attic remediation. Two winters since with zero ice dams. Worth every dollar.”
P. & R. Donato · Worcester, MA
Emergency + remediation · 2024
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Recent ice dam projects
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Next step
Photo-documented assessment. Itemized quote. We’ll tell you if repair makes more sense than replacement.
No high-pressure pitch · Walk-away friendly
Frequently asked
Yes — we use steam dam removal, not hammers or chemical melt. Steam (not high-pressure water) lifts the ice off the shingles without scarring the granules. We never use sharp tools or sodium chloride pucks (the chloride degrades shingle asphalt). Emergency removal is typically same-day or next-morning during peak winter.
In most homes, yes — properly air-sealing, ventilating, and insulating the attic will reduce or eliminate ice dam formation in the next freeze cycle. The exceptions are cathedral-ceiling sections (no attic to remediate), homes with very steep low-eave geometry, and homes where ice-and-water shield is the only real defense. We tell you up front which category you’re in.
Full attic remediation (air-seal, insulation top-up, ventilation rework) typically runs $2,800–$6,500 depending on attic size and condition. Heat-cable systems for 2–3 problem eaves: $1,400–$3,500. Ice-and-water shield retrofit during a roof replacement: incremental cost is typically 5–8% over the base replacement price.
Both. Properly designed heat-cable systems work well as a permanent solution for cathedral-ceiling sections, north-facing problem slopes, and homes where the attic can’t be remediated. As a substitute for fixing real attic issues, they’re a band-aid — you’ll pay $50–$200 per winter in electricity and the cables will need replacement every 5–10 years. We recommend them as a targeted tool, not a default.
Yes, for the first 3–6 feet up from the eave, after any snowfall above 6 inches. A long-handled roof rake (with a pole, not a ladder — never climb onto a snowy roof yourself) removes the snow that would otherwise melt and refreeze at the eave. Don’t try to scrape off existing ice — call us.
Next step
Photo-documented assessment. Itemized quote. We’ll tell you if repair makes more sense than replacement.