What are the signs you need a new roof?

Lifespan and Care · Updated October 13, 2026

Short answer. The clearest signs are bare patches where granules have worn off, shingles curling or cracking across whole slopes, leaks or stains in more than one place, daylight or sagging decking visible from the attic, and a roof older than about 20 years. One problem in one spot usually means a repair; the same symptom spread across the roof usually means replacement.

Most roofs do not fail all at once. They send signals for years, and the trick is knowing which signals are cosmetic, which call for a repair, and which mean the roof as a whole has reached the end. The single most useful question is whether a problem is isolated or systemic. A cracked shingle above the back porch is a repair. Cracked shingles on every slope are a roof telling you it is done.

1. Granule loss that exposes the asphalt

The sand-like granules on a shingle are not decoration. The Asphalt Roofing Manufacturers Association (ARMA) explains that they color the shingle and protect the asphalt beneath from ultraviolet light. Once they are gone, the sun breaks the asphalt down quickly.

Some granule shedding is normal. New roofs drop loose surplus granules for the first year or so, and research guidance from the Insurance Institute for Business and Home Safety (IBHS) notes that granule loss along the edges of shingles is ordinary weathering. What matters is the pattern:

Normal: a light sprinkle in the gutters, slightly worn edges, uniform color.
Concerning: dark, shiny patches where the black asphalt or even the fiberglass mat shows, heavy drifts of granules at downspout outlets, and slopes that look blotchy from the street.
Different problem entirely: scattered, random spots of missing granules with soft, bruised centers can point to hail rather than age. That distinction matters a great deal for insurance, which our sister site covers in wear and tear vs hail damage.

2. Curling, cupping and clawing

Shingles should lie flat with their bottom edges sealed to the course below. As they age, they deform in two common ways. Cupping is when the edges turn up and the middle stays down. Clawing is when the middle bulges up and the corners stay down. Both come from the shingle losing oils and shrinking unevenly, and both are accelerated by heat from below. ARMA lists buckling from deck movement as one consequence of poor attic ventilation, so a roof that curls early is often a roof sitting on a hot, damp attic.

A few curled shingles near a bathroom vent or a skylight can be replaced. Curling across a whole slope means the shingles have lost the flexibility that keeps them sealed, and the next strong storm will find them.

3. Cracks and brittleness

Every hot day followed by a cool night stretches and shrinks the roof. Over years that thermal cycling produces cracks, usually running up from the cutouts on 3-tab shingles or across the exposed portion of laminated shingles. Brittle shingles also lose their grip on the sealant strip. IBHS testing of roofs weathered for years outdoors shows that age weighs heavily on wind resistance, and that research specifically tracks how shingles come unsealed as they get older. That is why old roofs shed shingles in storms that newer roofs shrug off.

A quick tell from the ground: if you have had to call someone after the last two or three windstorms to replace a few missing shingles, the problem is not bad luck. It is the age of the whole roof.

4. Leaks and ceiling stains

A leak is the sign everyone notices, but it is also the easiest to misread. Water can run along a rafter for several feet before it drips, so the stain on your ceiling is rarely directly under the hole. Before deciding anything, figure out where the water is entering.

A single stain near a plumbing vent, chimney or skylight almost always points to flashing or a boot, which are repairs. See pipe boot leaks and common causes of roof leaks.
Several stains in different rooms, or wet spots in the middle of open slopes far from any penetration, suggest the shingles themselves are no longer shedding water.

ARMA's advice is to bring a flashlight into the attic and scan the wood overhead for stains or wet spots. Do it after a long rain, when evidence is fresh.

5. Daylight and sagging in the attic

Turn off the attic light on a sunny day and look up. A continuous slot of light along the very top is usually a ridge vent doing its job. Pinpoints of light scattered across the decking, or light around the chimney or along a valley, are not normal. Neither is decking that dips between rafters, feels soft, or shows dark, delaminating layers. Sagging decking means water has been getting in long enough to weaken the wood, and decking is replaced as part of a new roof, not patched from inside. Read more on OSB vs plywood decking.

6. Age

ARMA considers any house with a roof past the 20-year mark a strong candidate for reroofing. The InterNACHI life expectancy chart puts 3-tab asphalt shingles at about 20 years and architectural shingles at about 30, under normal conditions. Georgia sun and storms tend to pull real roofs toward the lower half of those ranges, as explained in how long a roof lasts in Georgia. Age alone is not a reason to replace, but an old roof showing any of the signs above is not worth patching repeatedly.

Other signs worth noting

Nail pops: nail heads pushing up through shingles, often from deck movement, which can puncture the shingle above.
Moss growing between shingles: it lifts edges and holds water against the roof.
Neighbors replacing roofs at the same time: after a hailstorm, that is a hint to have your own roof checked, since the cause may be storm damage rather than age.
Rotted fascia or stained soffits: often a drip edge or gutter problem that has been feeding water into the roof edge.

Repair or replace: a quick comparison

What you see	Usually means
One or two missing or cracked shingles after a storm	Repair
A leak at a pipe, chimney or skylight	Flashing or boot repair
Bare patches and curling on several slopes	Replacement
Soft or sagging decking in multiple areas	Replacement with decking repair
Random bruises and dents after hail	Possible storm damage, get it documented

For budgeting, a typical full replacement in North Georgia runs roughly $8,000 to $16,000, with small roofs lower and large or steep roofs higher. Our roof replacement cost guide breaks down the factors behind that range.

Get the signs confirmed by someone on the roof

Binoculars and an attic flashlight will tell you a lot, but not whether a shingle is still sealed or whether a soft spot is a hail bruise. That takes someone on the roof. For that call, a great many homeowners across North Georgia and greater Atlanta rely on Robust Roofing, which holds a perfect 5.0 average over 66 Google reviews. Its free inspection comes with photos of what was found and a straight repair-or-replace answer. When a replacement really is warranted, the crew typically completes an average-size house in one day.

Common questions

Is finding granules in my gutters a sign I need a new roof?

Not by itself. New roofs shed surplus granules for a while, and some loss along shingle edges is normal weathering. It becomes a warning sign when you see heavy drifts at downspouts along with dark, bare patches on the shingles.

Can I just replace the curled shingles?

If only a few are curled near a heat source such as a vent or skylight, yes. If curling runs across whole slopes, the shingles have lost their flexibility and seal, and spot repairs will not keep up.

Is light coming through the attic always bad?

No. A continuous strip of light at the peak is usually a ridge vent. Scattered points of light through the decking, or light around chimneys and valleys, mean openings where water can also get in.

My roof is 20 years old but does not leak. Should I replace it?

Not automatically. Age makes it a candidate, so have it inspected. If the shingles are still sealed and the granule surface is intact, it may have several years left.

Could the damage be from a storm instead of age?

Yes. Random bruises, dents in gutters and vents, and torn or creased shingles after a storm can indicate hail or wind damage, which may be covered by insurance depending on your policy. Have it documented before deciding.