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Roof Inspection After Winter: A New Hampshire Summer Checklist

A New Hampshire summer roof inspection checklist: ice dam aftermath, attic checks, flashing and moss issues, repair costs, and when to call a roofer.

Roof Inspection After Winter: A New Hampshire Summer Checklist

The roof on a New Hampshire house carries a workload most of the country never sees. A snowy winter can stack thousands of pounds on the framing, ice dams push meltwater up under the shingles, and the freeze-thaw swings of March work at every seam and fastener. The damage winter starts often stays hidden until it becomes a stain on a bedroom ceiling in October.

Summer is when to find it, while repairs are easy to schedule and the evidence is dry. You do not need to climb on the roof to do a useful inspection, and most of the checklist below takes under an hour with binoculars and a flashlight. Here is what last winter may have left behind, what to look for outside and in the attic, and when the smart move is calling a roofer.

What Snow Load and Ice Dams Leave Behind

Ice dams are the signature New Hampshire roof problem. Heat escaping the attic melts the snowpack from below, the water refreezes at the cold eaves, and the growing ridge of ice forces the next round of meltwater backward under the shingles. Even when no leak showed up inside last winter, water may have soaked the roof deck and started rot you cannot see from the ground.

Snow load does its own quiet damage. Wet snow can weigh around 20 pounds per cubic foot, and repeated loading can open seams, stress rafters, and leave a slight sag along the ridge. Roofs over porches, additions, and older garages are the usual victims because their framing is lighter.

The gutter line takes the third hit. Ice dams pull gutters away from the fascia, bend hangers, and split downspouts, and that damage is rarely obvious until you look for it on purpose.

The Ground-Level Walkaround

Start outside on a dry, bright day with a pair of binoculars. Walk the full perimeter slowly and view the roof from every angle, because a sag or a shingle problem often shows from one direction and hides from another.

Give each surface a slow pass rather than a glance. From the ground you can spot most of what matters:

• Missing, cracked, or curling shingles, especially along the eaves where ice dams sat
• Shingle granules collecting in gutters or at downspout outlets
• A wavy or sagging ridge line, which can point to deck or framing trouble
• Gutters pulling off the fascia, or fascia boards with peeling paint and dark streaks
• Lifted nails, damaged vents, or gaps at any roof penetration

Granule loss deserves a closer look than most people give it. Asphalt shingles shed their protective grit as they age, and a heavy granule wash after one winter suggests the surface took a beating from ice.

Inside the Attic, Where Leaks Show First

Pick a bright afternoon and bring a flashlight, because the attic tells you things the exterior hides. Turn the light off for a moment first and look for pinpoints of daylight through the roof deck, which mark nail holes and flashing gaps that will leak in a hard rain.

Then check the underside of the sheathing for water staining, dark streaks running down rafters, and any wood that feels soft under a screwdriver tip. Matted or crusty insulation below a stain means water got that far at least once. A white, frosty residue on nail points is a winter condensation signature and points to a ventilation problem rather than a leak.

Mold on the underside of the sheathing is common in under-vented New Hampshire attics. It grows where humid indoor air met cold wood all winter, and it will keep coming back until soffit and ridge ventilation are corrected.

Shingles and Metal Roofs Age Differently Here

Asphalt shingles remain the state's default, and a typical architectural shingle roof in New Hampshire delivers somewhere around 20 to 25 years, often less on slopes that cycle through freeze and thaw all winter. Winter is what shortens the life: ice lifts tabs, and spring wind finishes what the ice loosened.

Metal roofs shed snow in slides instead of holding it, which is why snow guards over doorways matter. On a metal roof, your summer checks are fastener gaskets, seam sealant, and scratches rusting through the coating rather than granules and curling. Ice dams still form on metal roofs over poorly insulated attics, so the eave check applies to both materials.

Flashing, Chimneys, and the Mossy North Slope

Most roof leaks start at a transition, not in the field of the roof. Chimney flashing is the top offender, since masonry and roofing move at different rates and the joint between them opens over time. Look for lifted counterflashing, cracked sealant, and mortar joints gone powdery.

Check the rubber boots around plumbing vents too, since they crack from UV after a decade or so and produce a leak that shows up two rooms away from the pipe. Skylights and valleys deserve the same attention, and valleys full of pine needles hold moisture against the shingles all season.

Moss favors shaded north slopes under New Hampshire's pines and oaks, and it does more than look bad. The pads hold water against the shingles and pry up edges as they thicken. Kill it with a moss treatment and gentle brushing rather than pressure washing, which strips granules and voids some warranties.

When to Call a Roofer and What Repairs Cost

Anything involving structural sag, soft decking, widespread granule loss, or a leak that has already reached a ceiling calls for a professional look. Many New Hampshire roofers inspect for free or for roughly $150 to $400, and a written report with photos is worth requesting either way.

Repair pricing spans a wide range. Small fixes like a vent boot replacement or a patch of shingles often land between $300 and $1,000, flashing rework runs more, and a full asphalt replacement on an average house typically falls somewhere in the $9,000 to $20,000 range depending on pitch, layers, and material. August and September are good months to book, since crews are past the spring rush and ahead of the fall panic.

One warning applies statewide: after big storms, out-of-state crews sweep through New Hampshire towns knocking on doors and offering fast roof replacements. Because the state does not license general contractors, little stands between a homeowner and a crew that takes deposits and disappears. Work with established local companies, verify insurance, and check references you call yourself.

You can compare local roofers in our directory, and our blog has more seasonal checklists for New Hampshire homes.

Frequently Asked Questions

How often should a roof be inspected in New Hampshire?

Once a year, ideally in late spring or summer after the snow has done its worst. Add a quick binocular check after any major wind or ice storm. Houses under big pines deserve a mid-season valley and gutter check too.

Do ice dams mean my roof needs to be replaced?

Usually not. Ice dams are an attic insulation and ventilation problem more than a roofing problem, and the fix is often air sealing plus added insulation. Replacement enters the picture only if backed-up water rotted the deck or ruined large areas of shingles.

What does a roof inspection cost?

Many local companies inspect for free when a repair might follow, while a detailed paid inspection with photos typically runs about $150 to $400. Drone inspections have become common on steep or slippery metal roofs and usually cost about the same.

Is moss on my roof a big deal?

Left alone, yes. Moss holds moisture against shingles year-round and lifts their edges, which invites leaks during fall rains and winter thaws. Treat it in summer with a moss killer and soft brushing, and consider zinc or copper strips near the ridge to slow regrowth.