10 Signs You Need a New Roof
Updated June 2026 · 9 min read
Most homeowners don't think about their roof until water appears on the ceiling. By then, the damage has often spread well beyond what a simple repair can fix. These 10 signs tell you when your roof is approaching or has already reached the point where replacement — not repair — is the right call.
1.Your Roof Is Past or Near Its Expected Lifespan
HighArchitectural asphalt shingles last 25–30 years. 3-tab shingles last 15–20 years. If your roof is within 5 years of its rated lifespan, plan for replacement — even if it looks fine. Deterioration accelerates in the final years, and problems tend to appear suddenly across multiple areas.
Action: Get an inspection to assess remaining life and plan the replacement budget.
2.Shingles Are Curling, Cupping, or Clawing
HighCurling edges (curling upward at the corners) indicate moisture absorbed into the shingle mat. Clawing (edges laying flat but middle rising) indicates the bottom layer of the shingle shrinking. Both mean the shingles are at end of life and will allow water penetration in heavy rain.
Action: Widespread curling requires replacement. Isolated curling on a few shingles may allow another 1–3 years.
3.Significant Granule Loss
HighGranules protect asphalt from UV rays. As shingles age, they shed granules into gutters. Check your gutters — granule accumulation means shingles are degrading. Look for bare spots on shingles from the ground. Once the asphalt is exposed to sunlight, it oxidizes and hardens within 1–3 years.
Action: Heavy granule loss across the roof indicates 2–5 years of life remaining at most.
4.You Can See Light Through the Attic
CriticalGo into your attic on a bright day and look for pinpoints of light. Light coming through means gaps, holes, or missing shingles — and if light can get through, so can rain, cold air, and pests. This is an active structural failure requiring immediate repair or replacement.
Action: Schedule an emergency inspection immediately.
5.Shingles Are Missing
HighMissing shingles leave the roof deck exposed. Even a single missing shingle can allow water to penetrate and begin rotting the decking within weeks. Multiple missing shingles, especially in different areas, suggest the adhesive throughout has failed and more will follow.
Action: Replace missing shingles immediately. If widespread, consider full replacement.
6.Recurring Leaks in Multiple Locations
HighA single isolated leak is usually repairable. Multiple leaks appearing in different areas — especially after each repair fails within 1–2 seasons — indicate system-wide failure. Chasing leaks on an aging roof is rarely cost-effective.
Action: Compare total annual repair costs to replacement cost. If repairs exceed 30% of replacement, replace.
7.The Roof Deck Is Sagging
CriticalSagging indicates long-term moisture saturation of the decking and possibly the rafters or trusses beneath. This is a structural failure. A sagging roof can collapse under heavy snow or rain load. This is not a repair situation — it requires replacement and structural assessment.
Action: Do not delay. Get a structural assessment and replacement estimate immediately.
8.Flashing Is Failing Everywhere
Medium–HighFlashing around chimneys, skylights, and walls can be replaced independently. But if flashing is failing throughout the roof — cracking, separating, or corroding — it often signals the same age-related deterioration affecting everything else. Replacing flashing alone on a roof that's otherwise at end of life is rarely cost-effective.
Action: Have a roofer assess whether flashing can extend the roof's life or if replacement is better value.
9.Significant Moss or Algae Growth
MediumAlgae (black streaks) is cosmetic and can be cleaned. Moss is structural — it grows roots into shingle layers, lifts them, and allows water to penetrate. Thick moss coverage on older shingles often indicates the granule surface is compromised and replacement may be warranted.
Action: Clean and treat. Have a roofer assess whether the underlying shingles are still intact.
10.Energy Bills Have Spiked Without Explanation
MediumA failing roof compromises attic insulation through moisture infiltration. Saturated insulation loses R-value rapidly — your HVAC works harder to compensate. If your energy bills have increased significantly and you cannot explain why, have both your attic insulation and roof inspected.
Action: Schedule a roof and energy audit inspection together.
Repair vs Replace: Quick Decision Guide
Repair is right when:
- • Damage is isolated to 1–2 areas
- • Roof is less than 15 years old
- • Repair cost is under 30% of replacement
- • Decking and structure are sound
Replace when:
- • Roof is within 5 years of rated lifespan
- • Multiple areas failing simultaneously
- • Annual repair costs exceed $1,500+
- • Decking is rotted or sagging
Frequently Asked Questions
How do I know if I need a new roof or just repairs?
Repair is appropriate when damage is localized — a few missing shingles, a single failed flashing, or an isolated leak. Replacement is warranted when the roof is near or past its rated lifespan, damage is widespread across multiple areas, or the total repair cost exceeds 30% of replacement cost. A professional inspection gives you a definitive answer.
What does granule loss on shingles mean?
Granule loss means asphalt shingles are nearing end of life. Granules protect the asphalt from UV degradation — once they're gone, the asphalt oxidizes and becomes brittle rapidly. If you see bare patches across large areas of the roof or significant granule buildup in your gutters, replacement is likely needed within 2–5 years.
Can a sagging roof be repaired without replacing it?
Minor sagging caused by a small area of wet or rotted decking can sometimes be repaired by replacing that section of plywood. However, widespread sagging indicates structural issues with the rafters or trusses — these require engineering assessment and are much more complex and costly to repair than a full replacement.
My roof is 20 years old but has no visible damage — do I still need to replace it?
At 20 years, a 3-tab asphalt shingle roof is at the end of its rated lifespan. Even without obvious exterior damage, the shingle adhesive may have failed, flashings may be corroding, and the underlayment may be deteriorated. A professional inspection is strongly recommended. Many 20-year roofs look passable from the ground but are within 1–3 seasons of failure.
Not Sure If You Need Repair or Replacement?
A free professional inspection gives you a definitive answer — with written documentation.