Signs Your Roof Needs Repair or Replacement (and How to Tell Which)

Your roof may need repair or replacement if you see missing, cracked, or curling shingles, granules piling up in your gutters, water stains on your ceiling, daylight through the attic boards, or a sagging roofline. If the problems are in one small area on a fairly young roof, a repair is usually enough. If they are spread across the roof, or the roof is more than about 20 years old, it is often time to replace it.

Catching roof problems early saves money. A small leak can quietly damage insulation, drywall, and framing long before you see a drip.

Safety first: You do not need to climb on the roof to check it. Use binoculars from the ground, look from a window, or check from the attic. Leave roof work to a pro.

How long do roofs last?

Hot sun, hail, strong winds, and poor attic ventilation can shorten these numbers. If you do not know your roof's age, check your home inspection report or ask the seller or previous owner.

10 signs your roof needs attention

1. Missing shingles

A few missing shingles after a storm are often an easy repair. Many missing shingles across the roof can mean the roof is wearing out.

2. Curling or buckling shingles

Shingles that curl up at the edges or cup in the middle are losing their shape, usually from age or heat. This often means the roof is near the end of its life.

3. Cracked shingles

Cracks let water get underneath. A few can be replaced. Widespread cracking points to replacement.

4. Granules in the gutters

Asphalt shingles are covered in small, sand-like granules that protect them from the sun. Owens Corning notes that heavy granule loss is a strong sign a roof needs replacing. Look in gutters and at the bottom of downspouts.

5. Water stains on ceilings or walls

Brown or yellow stains on the ceiling, especially on the top floor, often mean a roof leak. Leaks can also start at flashing around chimneys, vents, and skylights. Our guide on hidden water leak warning signs shows what to look for.

6. Daylight in the attic

Go into the attic on a sunny day with the lights off. If you see light coming through the roof boards, water can get in too.

7. Sagging roof

A roofline that dips or sags can mean the roof deck or supports are weak or wet. Call a pro right away.

8. Damaged flashing

Flashing is the metal around chimneys, vents, and valleys. If it is rusted, loose, or missing, water can leak in even if the shingles look fine.

9. Moss, algae, and dark streaks

Dark streaks are often algae and are mostly cosmetic. Thick moss, though, holds water against the shingles and can lift them. Have it cleaned gently, never with a pressure washer.

10. Rising energy bills and an unusually warm attic

A worn roof and poor attic ventilation can let heat escape in winter and build up in summer. Check the attic for air gaps too. Our guide on finding air leaks in your home can help.

Repair or replace? A quick guide

After a storm: what to do

1. Look from the ground for missing shingles, dented gutters, or fallen branches.
2. Check the attic and top-floor ceilings for new stains.
3. Take photos with the date.
4. Call your insurance company soon if you see storm damage. Insurance often covers sudden damage, but not normal wear.
5. Be careful with door-to-door roofers after big storms. Get written quotes from local, licensed, insured contractors.

If you notice new cracks inside after a big storm, see our guide on cracks that appear after a storm.

Keep your roof in good shape

• Clean gutters at least twice a year so water drains away.
• Trim branches that hang over the roof. Our tree trimming cost calculator gives a price estimate.
• Keep the attic ventilated so heat and moisture can escape.
• Get a roof inspection every few years and after major storms.

The bottom line

Watch for missing, curling, or cracked shingles, granules in the gutters, ceiling stains, daylight in the attic, and sagging. Small problems on a young roof can usually be repaired. Widespread wear, heavy granule loss, or a roof over 20 years old usually means it is time to replace it. Check from the ground or the attic, not the roof, and get at least three quotes from licensed roofers.