The Homeowner’s Guide to Roofing

Some roof symptoms are cosmetic; others are early notice of a failure that gets more expensive by the week. A handful of granules collecting in the gutter after a hard rain is normal aging. Bald patches where the mat shows through, shingles that are cupping or curling at the edges, or a ceiling stain that reappears after every storm are different — those are early notice that water is already getting past the shingle field.

Daylight visible through the attic decking, soft or spongy spots underfoot on the roof, and moss or algae streaking across a north-facing slope are all worth a look sooner rather than later. None of these are emergencies yet, but none of them improve with another season of weather either.

A surprising share of roof problems start with air, not water. An attic that runs hot and damp in summer bakes shingles from underneath, shortening their life well before the manufacturer’s rated years are up. The same imbalance in winter melts snow on the upper roof that refreezes at the eaves — an ice dam that forces water backward under the shingles instead of off the edge.

Before assuming a leak means bad shingles, check the attic: look for daylight around vent boots, feel for uneven heat near the ridge, and check insulation depth at the eaves. A ventilation problem found early is a modest fix. Found late, after it has cooked several slopes of shingles or caused repeated ice-dam leaks, it is a much bigger one.

A flat-rate roofing quote should specify the shingle or membrane brand and grade, the underlayment type, ice-and-water shield coverage at eaves and valleys, and what happens if the deck needs repair once it is exposed. If a quote is vague on any of those, ask before signing, not after the tear-off has started.

Be cautious of a bid that comes in dramatically lower than every other estimate. The gap usually shows up later — thinner shingles, skipped ice-and-water shield, a ventilation upgrade quietly left out, or a change order once the crew has already pulled the old roof off and there is no walking away.

• Ask whether the price includes a permit, if the job needs one
• Ask what brand and class of shingle or membrane is specified
• Ask what a deck-repair contingency costs per sheet, in writing, before day one

A repair makes sense when the problem is localized — one damaged valley, a run of wind-lifted shingles, a single failed flashing detail — and the rest of the field is still doing its job. Replacement makes sense when the failure is systemic: granule loss across multiple slopes, brittle shingles that crack when lifted, or a deck that has taken on water in more than one spot.

The math tips toward replacement faster than most homeowners expect once a roof is within a few years of its rated life and already needs its second or third repair. At that point, another patch is rarely the cheaper option once you count it against a roof that is going to need full replacement soon regardless.

Before help arrives, the most useful thing most homeowners can do is get a bucket under an active drip and move anything valuable out from underneath it. If water is reaching a light fixture or an outlet, shut off power to that circuit before doing anything else.

Photograph the interior damage and, if it is safe to do so from the ground, the exterior section that looks disturbed — broken shingles, a lifted ridge cap, debris on the roof. Those photos are useful whether or not you end up filing an insurance claim, and they cost nothing to take before anyone arrives to tarp the roof.

• Get water off the floor before it reaches flooring or drywall further
• Photograph the damage before anyone touches the roof
• Call for emergency tarping rather than climbing up yourself