Ice Dam Prevention in Hampstead, NH
Ice dam prevention in Hampstead, NH comes down to keeping the roof cold and the meltwater moving. Attic insulation and ventilation are the real fix, and they are not gutter work. Our part is the gutter side, with clean troughs, sound pitch and downspouts that stay open, so water has somewhere to go.
- ★ 5.0 on Google · 29 reviews
- Serving since 2024
- Based in Hampstead, NH
On this page
An ice dam is a heat problem that shows up at the gutter. Within winter gutter protection, this page sets out which fixes matter, which ones are ours and which belong to someone else.
Attic heat, not the gutter, starts an ice dam
Heat escaping into the attic melts the snow, and the water refreezes at the cold eaves, with or without gutters. Warm air reaches the roof deck, the snow melts from the bottom, and the water runs down to the overhang, which sits outside the warm envelope and stays cold. There it freezes.
Each cycle adds to the ridge. Water then pools behind it and can work up under the shingles. Dwellics puts Hampstead below 50°F on about 195 days a year, and BestPlaces shows 17.1 inches of January snow, so a roof with a heat leak gets many cycles a season.
Signs of an ice dam, and what causes the heat leak
The usual culprits are air leaks and thin insulation. Building-science guidance points to recessed lights, attic hatches, plumbing and wiring openings, and bath fans that vent into the attic. It also says baffles at the eaves must keep a ventilation channel open above the insulation, at least 2 inches by one guide. Look for these signs on your own roof:
- Bare patches in the snow while neighboring roofs stay white
- Thick icicles along one eave
- Stained ceilings near an outside wall
- Frost on the underside of the roof deck in the attic
Ice dam prevention in Hampstead, NH: what each fix does
Attic work comes first because it deals with the cause. The rest manage the symptoms or limit the damage.
| Fix | What it does | Who does it |
|---|---|---|
| Air sealing | Stops warm air reaching the attic | Insulation contractor |
| Attic insulation | Slows heat moving through the ceiling | Insulation contractor |
| Ventilation | Keeps the roof deck cold | Roofer or insulation contractor |
| Ice and water shield | Protects the roof deck if water backs up | Roofer, at reroofing time |
| Clean, well-pitched gutters | Gives meltwater a way out | Gutter crew |
| Open downspouts | Keeps water moving to the ground | Gutter crew |
| Heated gutter cables | Melts a drainage path at a problem spot | Ask us, and an electrician may be needed |
| Snow guards | Holds sliding snow on the roof, with no effect on dams | Gutter crew |
If you are planning attic work, federal 25C and 25D credits ended December 31, 2025. For New Hampshire's HEAR program, check with the NH Department of Energy.
Where do gutters and ice dams connect?
A gutter does not cause a dam, but it does decide how much trouble meltwater gets into. A clean gutter with good pitch empties during a thaw. A clogged one fills, freezes and adds to the ice at the eave.
Weight is the other link. A frozen gutter pulls on its hangers and fascia for as long as it stays frozen, and ice comes in at about 57-60 pounds per cubic foot. The damage shows up later as a sagging run or a section that lets go.
Our gutter-side visit before winter
This is the part we do, and it fits around leaf drop.
- We clean the troughs and clear every outlet.
- We flush the downspouts and check where they discharge.
- We check the pitch and correct any low spot that holds water.
- We tighten or replace loose hangers.
- We reseal any failed seams on clean, dry metal.
- We look for soft fascia and ice stains on the siding, then give you a written price for anything extra.
If we think your ice comes from the attic, we will say that instead of selling gutter work.
What we leave to other trades
We do not insulate attics, install bath fan ducts or lay roofing. Those jobs need the right contractor. Ask an insulation contractor for an energy audit or blower door test if you want to know where the heat is going. Ask a roofer about ice and water shield when the roof next comes off, since it goes under the shingles and cannot be added on top.
Removing a dam that has already formed is a separate job, covered on our ice dam removal page. Call and ask about that one first.
What does preventing ice dams cost?
Our part is priced per job after we see it, in writing. The factors are linear feet, height, roof pitch, how much debris has built up and any repairs needed. Attic costs come from the contractors who do that work.
Town rules, permits and incentives
We found no state gutter license in New Hampshire, and any permit for attic or roof work comes through the town. Attic insulation and roofing are other trades, so ask Hampstead's building office whether that work needs one. For incentives, the federal 25C and 25D credits ended December 31, 2025, and the NH Department of Energy can say what the HEAR program offers. Ask each contractor for a certificate of insurance.
As a rough reference, This Old House gives a national cleaning average of about $275 for 2026. That is a third-party number, and we do not price from it.
Why Lanes Gutters for the gutter side
Google lists Lanes Gutters at 5.0 from 29 reviews (November 2026), and we have served Hampstead customers since 2024. Reviewers call us responsive, and Jewell's review says we fixed "the entire problem." A local roofing company reviewed us too.
Our coverage runs from Hampstead to towns such as Raymond, Chester and Derry. If you own a seasonal place further north, our post on closing up a Lakes Region home covers the same ground for a house left empty.
Customers on how we handle a problem
“Caio came out promptly to look at our 30,000 square foot commercial building in Plaistow and provided an estimate that evening. He came back a week later and did a wonderful job cleaning all of the gutters.”
“Caio was professional and courteous. He spotted multiple things that were wrong with our gutters beyond what we knew about and performed the repair promptly at an excellent price.”
“I had a great experience working with Caio. I needed snow guards installed and gutters lowered and replaced. He was thorough, communicative, on top of the project, and the results were perfect.”
5.0 on Google · 29 reviews as of November 2026. Read all reviews
Ice Dam Prevention: common questions
What causes ice dams on New Hampshire homes?
Attic heat. Warm air reaches the underside of the roof and melts the snow on top. That water runs down to the cold eave and refreezes, building a ridge that holds back more water. New Hampshire supplies the rest with long cold stretches, and Dwellics shows around 62 days of snow cover a year in Hampstead. Dams form with or without gutters.
Do clogged gutters make ice dams worse?
They can. A clog does not start a dam, but a trough full of frozen leaves gives ice a base at the eave and leaves meltwater nowhere to go. The extra ice also adds weight to the hangers. Cleaning after leaf drop is the cheapest step on this page, and we check the outlets and downspouts during that visit.
Which homes in Hampstead are most at risk?
Homes that leak attic heat. Look at capes and other houses with finished rooms under the roof slope, where insulation space is tight. Also watch recessed lights, attic hatches, bath fans vented into the attic, and valleys over short eaves. Hampstead's median home was built in 1988 (ACS 2020-24), so many attics carry insulation levels from that era.
Do gutter guards help with ice dam prevention?
Only a little, and indirectly. Guards keep leaves out, so the gutter drains better going into winter. They do nothing about attic heat, and ice can still form on top of them. Snow can sit on some guards too, so look at the design before buying. Think of them as a cleaning decision, and judge them on that basis.
When is the best time to start ice dam prevention in Hampstead?
Before the snow comes, and ideally before the attic gets cold. Insulation contractors and roofers can work more easily in mild weather, and gutter work goes best on dry days. If you are reading this with ice on the roof, note where it formed, photograph it, and use those notes when you plan the fixes for next fall.
Areas served for ice dam prevention
- Atkinson, NHAtkinson attics from the 1980 median build era are worth checking; about 5 minutes away.
- Newton, NHNewton sits on the Massachusetts line; its year-round Country Pond conversions often lack full gutters, so meltwater has no path.
- Londonderry, NHLondonderry subdivisions near the airport carry attic insulation from the 1970s-90s; roughly 15 minutes away.
- Sandown, NHNeedles from lots around Phillips Pond freeze in gutters, which is the gutter-side fix we handle; about 5 minutes.
- Swanzey, NHOlder homes south of Keene on flood-prone low ground, median built 1978; about 1 hour 35 minutes, booked ahead.
- Belmont, NHLake Winnisquam shoreline homes and the old mill village need ice protection; about 1 hour 15 minutes, booked ahead.
- Derry, NHAntique East Derry attics and 1980s Route 28 attics, median built 1983, call for different air sealing; about 5 minutes.
- Chester, NHPines over Route 102 roofs shed needles into gutters; clear outlets let meltwater drain; about 10 minutes.
- Raymond, NHLots near the Lamprey River and Onway Lake need downspouts that stay open in a thaw; roughly 15 minutes away.
- Windham, NHValleys on big Cobbetts Pond roofs funnel meltwater to single eaves; roughly 10 minutes from our base.
Need ice dam prevention?
Call and tell us what you are seeing. We will take it from there.
25 Glenwood North Rd #16, Hampstead, NH 03841
(208) 464-4195
Mon–Sat 8am–6pm · Sunday closed