By the time a roof in Hanover has a visible ridge of ice at the eave, meltwater has already been pooling behind it for several freeze-thaw cycles. As part of our complete Hanover winter roof services, crews handle commercial ice dam removal across Grafton County.
Hanover Ice Dams: What a Five-Month Snow Pack Does
The defining feature of a Grafton County winter is persistence. It is not one storm, it is a continuous load sitting on the roof from late fall through to a spring thaw.
A long season is not a safer one. It means more freeze-thaw cycles, and each one adds a layer to the dam. By late winter the ice at a Grafton County eave can be a foot deep and locked to the shingle, with standing water sitting behind it.
Ice-barrier practice in Grafton County
Insulation depth matters at least as much as membrane in this climate, and Grafton County stock built before modern attic standards tends to be short on both. One is a code question; the other is why the dam formed.
Commercial Ice Dam Removal in Hanover: How The Work Runs
Membrane-safe means something specific
EPDM, TPO and modified bitumen all tolerate steam at low pressure and none of them tolerate chipping, scraping or a pressure washer. Crews steam the drains and scuppers open first to restore flow, then work the ponded ice, and they stay off seams and flashing details with the lance.
Mechanical units, conduit runs, solar racking and safety railing all get worked around rather than over.
Access control, hatches and escorts
Getting onto a commercial roof is a procedure: keys or fobs, a hatch that may be padlocked, a ladder in a locked plant room, sometimes a site induction and an escort for the duration.
Sorting that out with the property manager in advance is the difference between a crew starting at seven and a crew waiting in the parking lot until nine. Where a tenant controls the only access, that conversation happens before the dispatch rather than on the roof.
Roof warranties and who is allowed up there
Most commercial membranes carry a manufacturer's warranty with conditions about who may work on the roof and what methods are permitted. Snow removal is generally fine; mechanical ice removal very often is not, and the wrong contractor with the wrong tool can void cover worth considerably more than the clearing.
The warranty gets read before the roof is walked, and the method used is one the document permits.
Insulation above the deck changes the melt pattern
A modern commercial assembly puts most of its insulation above the deck, so very little building heat reaches the membrane. That is good for energy and it means the snow that lands mostly stays - the roof does not self-clear the way an under-insulated one does.
Where dams do form on those roofs it is almost always at a thermal bridge: a parapet, a curb, a drain bowl or a line of fasteners. Those are the spots crews work first.
Internal drains fail differently from gutters
A residential gutter overflows when it blocks. An internal roof drain just stops, and the water stays on the deck at depth until it finds a seam, a flashing detail or a pitch pocket.
Crews open the drain throat and then confirm flow in the leader below before calling it clear. An open drain over a frozen leader is not an open drain, and on a Hanover building that distinction shows up as a tenant ceiling two floors down.
What you get in Hanover
- Overnight windows availableWork scheduled outside occupancy where access demands it
- Documentation for the boardCondition report and photo record with every invoice
- EPDM, TPO and mod-bitLow-pressure steam only, seams and flashing details avoided
| Removal method | Low-pressure steam only. No chipping, salt or pressure washing. |
|---|---|
| Coverage area | Hanover and Grafton County |
| Documentation | Dated before and after photos, written scope in Xactimate line items |
| Typical scope | Steam, 6-14 crew hours typical |
| Primary climate stressor | Sustained sub-freezing, long season |
| Dispatch window | Same day to 24 hours |
| Service | Commercial Ice Dam Removal in Hanover, NH |
Neighborhoods and Towns We Reach From Hanover
Crews working Hanover cover the adjoining communities on the same route — Etna, West Lebanon, Lyme, Enfield and Lyme Center — so a storm week usually means one truck handling several addresses in Grafton County rather than separate trips.
Nearest hub towns with their own commercial ice dams pages: Lebanon, Claremont, Franklin, Laconia, Concord, Keene.
Coverage runs across Hanover and the nearby towns all winter, and capacity is surged into whichever New Hampshire market the storm actually hits.
Most jobs do not stop at one service. Commercial Ice Dams in Hanover often runs alongside commercial roof snow removal in Hanover, and both get written into one scope rather than billed as separate visits.
Active leak right now? Our 24/7 Hanover steam ice dam removal crews are dispatched first during a freeze event. Call (888) 561-9664.
