Homeowners across Rockingham County call about icicles. Icicles are cosmetic. The dam behind them, holding back standing water, is not. As part of our complete Londonderry winter roof services, crews handle ice dam removal across Rockingham County.
Why Londonderry Roofs Dam Up: Nor'easter Load and the Maritime Swing
The maritime air is the other half of it. Temperatures in Rockingham County move either side of freezing within the same day far more often than they do inland, and every crossing moves water down the roof and locks it at the eave.
The building stock compounds it. A great many Londonderry houses were built long before attic air sealing was a consideration, and the retrofits that followed often insulated the floor while leaving the bypasses wide open.
Ice-barrier practice in Rockingham County
Coastal New Hampshire jurisdictions generally require the membrane to extend past the interior wall line. On a house in Londonderry with a deep overhang that is further up the roof than a single course.
Ice Dam Removal in Londonderry: How The Work Runs
What happens after the ice is off
Once the eave is clear and water is draining, the crew walks the interior with you where there is visible damage and says plainly whether it needs drying. Wet insulation and a damp ceiling cavity do not resolve themselves in a cold Londonderry February. Water Stain on the Ceiling in Winter.
If it does, that is a separate scope and it gets written separately — nobody is upsold a dryout on the strength of one damp patch.
What the dam has already done to the gutter and fascia
Ice expands as it forms, and a trough packed solid pushes the gutter away from the fascia a little more every cycle. By the time the dam is thick enough to leak, the hangers are often pulled, the back of the trough has lifted, and the fascia board behind it has been wet for weeks.
None of that is visible until the ice is off. It gets photographed when it appears, because a bent gutter found in February is a great deal easier to argue about with a carrier than one discovered in May.
Why a drainage channel is not removal
Cutting a few channels through a dam so water can get past is quick and it is sometimes sold as ice dam removal. It drains the roof for as long as the channels stay open, which in a Londonderry cold snap can be a single night before they close again.
Removing the dam means taking the ice off down to the shingle along the whole affected run, so the eave can drain the way it was built to. It takes longer and it is the only version that holds.
How long a removal actually takes
A single-story eave with a thin dam and clear gutters is often an hour or two. A two-story Londonderry house with ice standing a foot deep across the front, frozen downspouts and a valley packed solid is most of a day for a two-man crew. The honest answer on the phone is a range and the reason for it, not a number designed to win the booking.
The estimate is revised out loud if the roof turns out worse than it looked from the ground, before the extra hours are worked rather than after they appear on the invoice.
Why the gutter has to be cleared in the same visit
A dam sitting above a gutter packed solid with ice is only half the problem. Clear the eave and leave the trough frozen, and the next day's meltwater has nowhere to run — it backs up onto the roof and the dam rebuilds from the bottom.
Crews steam the trough and the downspout through to daylight on the same visit. It adds time, which is why the hour estimate given on the phone accounts for it, and it is the difference between a fix and a repeat visit in Londonderry the following week.
What you get in Londonderry
- Photographed as we workDated before and after images and a written scope your adjuster will accept
- Gutters cleared tooTrough and downspout steamed through to daylight in the same visit
- Valleys and dormersThe dead spots that hold the deepest ice get worked specifically
| Pricing model | Billed by the crew hour, rate quoted before dispatch |
|---|---|
| Dispatch window | Same day to 24 hours |
| Coverage area | Londonderry and Rockingham County |
| Service | Ice Dam Removal in Londonderry, NH |
| Removal method | Low-pressure steam only. No chipping, salt or pressure washing. |
| Documentation | Dated before and after photos, written scope in Xactimate line items |
| Primary climate stressor | Nor'easters, rapid thaw-freeze swing |
Rockingham County Coverage From Londonderry
Crews working Londonderry cover the adjoining communities on the same route — East Derry, Litchfield, Windham, North Salem and Auburn — so a storm week usually means one truck handling several addresses in Rockingham County rather than separate trips.
Nearest hub towns with their own ice dam removal pages: Derry, Merrimack, Hudson, Nashua, Bedford, Manchester.
Londonderry sits inside the regular New Hampshire service area, so a crew is usually scheduled the same day or the following morning.
Most jobs do not stop at one service. Ice Dam Removal in Londonderry often runs alongside water mitigation & dryout in Londonderry, and both get written into one scope rather than billed as separate visits.
Active leak right now? Our 24/7 Londonderry steam ice dam removal crews are dispatched first during a freeze event. Call (888) 561-9664.
