Signs You Need a New Roof (and Signs You Don't Yet)

What are the clearest signs you need a new roof?

The clearest signs are wear that shows up across the whole roof rather than in one spot: shingles that are curling or cracking on several slopes, bare patches where the granules have worn away, tabs that lift or blow off in ordinary wind, a deck that feels soft or looks wavy, and leaks that keep returning in different places. Any one of these deserves a closer look. If you see two or three together, the shingles have usually reached the end of their working life.

Curling, cupping or clawing shingles

Healthy architectural shingles sit tight against the roof. As they age, the edges turn up (cupping) or the middles hump while the corners curl down (clawing). Either way, wind can get underneath and rain can be driven back up under the shingle above. A few curled shingles over a bathroom vent can be a local problem. If you can see curling on most of a slope from the street, the cause is age.

Bald spots and heavy granule loss

The ceramic granules on a shingle are what protect the asphalt from sunlight. Watch for dark, smooth patches where the granules have gone, or gutters and downspout outlets that fill with what looks like coarse sand year after year. Either one means the asphalt underneath is exposed and will dry out and crack faster.

Cracked, brittle or unsealed shingles

Each shingle has a strip of adhesive that bonds it to the one below. On an older roof those bonds let go, so tabs flap and snap in a nor'easter. If you are picking up shingles from the lawn after every decent wind, not just after a major storm, the shingles have lost their grip.

Leaks that keep coming back

One leak is usually a repair. Repeated leaks in different rooms, or a roof that has been patched several times in a few years, suggest the whole surface is wearing out faster than it can be fixed piece by piece.

A sagging or spongy roofline

Look along the ridge and the eaves from across the street. They should be straight. A dip, a wave or a section that sags points to rotted decking or a structural issue under the shingles. This sign needs a professional soon, because the damage is in the wood, not just the shingles.

Which roof problems look bad but don't mean you need a new roof?

Plenty of things that worry homeowners are cosmetic or can be fixed with a targeted repair. On their own, black streaks, a handful of missing shingles after a storm, one leak around a chimney, a bit of moss on a shady slope or a few loose granules from a newer roof rarely justify replacing a sound roof.

• Black or dark green streaks. These are usually algae, which is common on north-facing slopes and on roofs shaded by Long Island's mature oaks and maples. It looks bad but generally does not damage the shingle in the short term. It can be cleaned gently, but never with a pressure washer, which strips granules.
• A few missing shingles after a storm. If the rest of the shingles are still sitting tight, well sealed and holding their granules, the missing ones can be replaced individually. The new shingles may not match an older roof's color exactly, but that is cosmetic and not a reason to replace the roof.
• One leak in one place. Most single leaks on Long Island come from failed flashing around chimneys, skylights, sidewalls or pipe boots, not from the shingles themselves. That calls for a roof repair, and a good repair fixes the cause instead of caulking over the symptom.
• Granules in the gutters on a newer roof. New shingles shed loose surplus granules for a while after installation. A small amount in the first season or two is normal. Steady, heavy loss on an older roof is a different story.
• Moss in a patch or two. Moss holds moisture against the shingles and should be dealt with, but a small amount on a shaded slope is a maintenance job, not a death sentence for the roof.
• A ceiling stain after one hard winter. A stain near an exterior wall after a snowy stretch can come from an ice dam at the eaves. That points to gutters, drainage or ventilation, which can often be corrected without replacing the whole roof.

Age alone is not a sign either. An older roof whose shingles are still sitting tight, sealed and holding their granules may have useful years left, while a younger roof with poor ventilation can wear out early. Age is a reason to have the roof checked, not a verdict.

How can you check your roof safely from the ground?

You can learn a lot without setting foot on a ladder: walk around the house with a pair of binoculars, check the gutters and look at your ceilings. Leave anything closer than that to a professional. The National Roofing Contractors Association advises homeowners to assess roof damage from ground level and not to attempt repairs themselves.

1. Walk the perimeter on a clear day. Look at every slope you can see, including the back of the house. Note curled edges, missing tabs, bare patches and any dips in the ridge or eaves.
2. Use binoculars on the details. Check around the chimney, skylights, plumbing vents and where the roof meets a wall or dormer. Rusted, lifted or caulk-covered flashing is a common leak point.
3. Look in the gutters and at the downspout outlets. Note a heavy build-up of granules, especially on an older roof, and any pieces of shingle.
4. Check ceilings and upper walls inside. Look for brown rings, bubbling paint or soft drywall. Pay particular attention to top-floor rooms, closets against outside walls and the areas around light fixtures.
5. Check again after a storm. After a nor'easter or a summer thunderstorm, walk the yard for shingle pieces and take photos. Dated photos are useful if you later need to talk to your insurer.

If you see something you are unsure about, take a photo and stop there. Wet, steep or mossy shingles are dangerous to walk on, and walking on brittle shingles can cause the damage you are trying to find.

Does it matter if the damage is widespread or in one spot?

Yes, and it is the most useful question to ask. Damage in one spot usually has one cause that can be fixed. Damage spread across several slopes usually means the shingles themselves are worn out, and repairing one area just moves the next problem somewhere else.

Long Island's weather makes the pattern easy to read once you know what to look for. On the South Shore, constant wind and salt air off the bays and ocean wear on the windward slopes first, so lifted and missing tabs often appear there before anywhere else. Slopes that face south and west take the most summer sun and tend to blister, crack and lose granules sooner than the shaded side. Freeze-thaw cycles through the winter open small cracks and loosen flashing a little more each year.

Older houses add their own complications. Capes have dormers and valleys where water concentrates. Split-levels and many colonials have walls that meet the roof at several points, and each one is a flashing detail. Ranches have long eaves and gutter runs that collect leaves and pine needles, so drainage problems often appear there first. A problem confined to one of those details is often a repair. When you see the same wear on every slope and at every detail, a roof replacement is usually the answer.

What should you do if you see the signs?

Get a professional inspection before you commit to anything, so your decision is based on the roof's actual condition rather than a guess from the driveway. An inspection should tell you what is wrong, why, whether it can be repaired and roughly how much life the roof has left.

A few things are worth asking about during the visit:

• How many layers are on the roof now? Many older Long Island and Queens homes already have two layers of shingles. The Asphalt Roofing Manufacturers Association notes that most building codes do not allow more than two roof coverings, and extra layers hide the condition of the deck. We do not install new shingles over old ones as standard. A full tear-off lets us see and repair any rotted wood before the new roof goes on.
• Is the decking sound? Soft spots or a wavy deck change the scope of the job, and it is better to know before work starts.
• Is there storm damage worth reporting? If recent wind caused the problem, photos from the inspection can help when you talk to your insurer.
• What drives the cost? The price depends on the roof's size and pitch, how cut-up the roofline is, how many old layers have to come off, how much deck repair is needed and how many chimneys, skylights and walls need flashing. A written, itemized estimate shows you each of those separately.

If you would like a second set of eyes, our roof inspection is free, takes about 45 minutes and comes with a photo report, so you see the same evidence we do. If a repair will do the job, we will tell you so. You can book a free inspection here or call (516) 924-2050. We work throughout Long Island & Queens, NY.

Related service: Roof Replacement