Post-Winter Roof Assessment Guide — Spring Damage Check

Ice dams push water under shingles from below, breaking the adhesive seal and physically lifting shingle tabs. Walk the eave line with binoculars and look for shingles that are sitting slightly higher than their neighbors, shingles with visible cracks along the tab slot, or shingles that have slid downhill from their original position. Ice dam damage is concentrated on the first 3–6 feet of the roof above the eave.

Repeated freeze-thaw cycles crack and separate sealant around chimney flashing, wall step flashing, and vent pipe boots. The caulk expands when wet, freezes, expands more, thaws, and separates from the substrate. Inspect every sealant joint and re-seal with polyurethane roofing sealant where cracking or separation has occurred. This is the most common post-winter repair and prevents thousands in water damage.

Ice-filled gutters can weigh 20+ pounds per linear foot, which bends hangers, pulls gutters away from the fascia, and disrupts slope alignment. Check every gutter run for sections that have pulled away, sagged below the fascia line, or lost their slope toward downspouts. Re-hang affected sections before spring rains arrive — a misaligned gutter directs water behind the fascia.

Ridge caps and hip shingles take the most wind exposure on the roof. Winter storms with sustained high winds can peel, crack, or completely remove cap shingles. From the ground, check the ridge line against the sky — any missing cap shingles will show as a visible gap. Cap shingles protect the ridge vent and the intersection of opposing roof slopes; a missing cap means direct water entry.

Use a bright flashlight and inspect the underside of every accessible deck section. Fresh water stains are dark and damp; old stains are lighter and may have a hard mineral edge. Focus on areas below known vulnerable points: valleys, chimneys, pipe boots, and the first 3 feet above the eave (ice dam zone). Mark any stains with tape and photograph them for comparison next year.

Winter condensation and ice dam leaks create the sustained moisture that mold needs to grow. Check for black, green, or white fuzzy growth on the underside of the deck, along rafters, and at the eave intersection. Small patches (under 10 sq ft) can be treated with fungicidal spray. Widespread mold indicates a chronic ventilation or leak problem that must be solved before treatment — otherwise the mold returns within months.

Ice dam leaks often saturate insulation near the eaves without visible evidence in the living space below. Push your hand into the insulation at the eave line — wet insulation feels noticeably cooler and heavier than dry. Compressed insulation (from foot traffic or animals) performs at a fraction of its rated R-value. Wet insulation must be removed and replaced — it won't dry effectively in place and becomes a mold incubator.

Winter ice can block soffit vents. Blown insulation can shift during winter and crowd soffit channels. Check that daylight is visible at each soffit vent from inside the attic, and that the ridge vent shows an unobstructed gap. Proper ventilation prevents ice dams next winter and stops moisture accumulation year-round. Install polystyrene rafter baffles in any bay where insulation has blocked the soffit.

Replace any shingles that are cracked through, missing, or have lost their adhesive bond. For shingles that are intact but have lifted tabs, apply a dab of roofing cement under each tab and press flat. Shingle adhesive activates above 40°F, so repairs made in spring will self-seal as summer temperatures arrive. Match replacement shingles by brand, product line, and color — mismatched repairs are visible and reduce curb appeal.

If you found ice dam evidence, the fix is not on the roof — it's in the attic. Ice dams form when heat escaping through the ceiling warms the roof deck and melts snow from below. The meltwater refreezes at the cold eave, building a dam. Solution: seal air leaks around wiring penetrations, plumbing stacks, recessed lights, and the attic hatch, then add insulation to R-38 minimum. This prevents ice dams permanently.

If you found structural damage (sagging rafters, soft decking), widespread mold, or damage covering multiple roof surfaces, call a professional roofer for assessment. Spring is ideal for professional inspection because the damage is fresh and visible, temperatures allow immediate repair, and roofers aren't yet fully booked for summer. Get 2–3 quotes and book repairs before the summer rush.

Winter deposits grit, granules, leaf debris, and sometimes ice-shattered gutter sections. Clean all gutters and downspouts thoroughly. While cleaning, verify slope — hold a level along each gutter run and confirm flow toward the downspout (¼ inch drop per 10 feet is ideal). Re-hang any sections that have lost slope from ice weight.