Someone looked at your roof and said it needs to be replaced. Before you spend that kind of money, you want to know if it is true.
This guide lays out the real signs you need a new roof next to the signs that point to a simple repair. Most roofs give clear clues from the ground, from the gutters and from the attic. You will also learn how roof age fits into the decision, the one check you can do this afternoon and the questions that make sure a roofer's answer is based on what they actually saw up there.
Signs You Just Need a Repair
A problem in one spot is usually a repair. These are the common ones:
One leak with one clear source
A single stain on the ceiling, traced to one spot on the roof, is usually a repair. Our guide to roof leak repair cost explains what that fix involves.
A few missing or torn shingles
Wind can tear off a handful of shingles on a roof that is otherwise sound. If the shingles around them lie flat and still grip, they can be replaced.
A cracked vent pipe boot
The rubber collar around a plumbing vent often wears out years before the shingles do. Replacing it is a small, common job.
Loose flashing
The metal around a chimney, skylight or wall can pull loose or lose its seal. It can be resealed or replaced without touching the rest of the roof.
Algae streaks
Black streaks on shingles are usually algae. They are a cleaning question, not a replacement question.
Signs You Need a New Roof
When the problem is everywhere instead of in one spot, the roof is wearing out as a whole. Look for these:
Curling or cupped shingles across whole slopes
Shingles that curl up at the edges or sink in the middle have dried out. One or two is a repair. A whole slope of them means the shingles are at the end of their life.
Bald spots and heavy granule loss
The sand-like granules on shingles protect them from the sun. When patches of shingle look smooth and dark, and the gutters fill with granules, the shingles are wearing through.
Cracked or brittle shingles
If shingles crack when a roofer lifts them to make a repair, there is little left to repair. Patches will keep failing around the new pieces.
Several leaks at once
Leaks in more than one room, or new leaks after each repair, point to a roof that is failing in many places.
A sagging roofline or soft decking
A dip in the ridge, waves between rafters or decking that feels spongy underfoot means water has reached the wood. This needs a pro soon, because the problem is now under the shingles.
Daylight in the attic
On a sunny day, turn off the attic light. Light coming through the roof boards, other than at vents, means gaps that water can get through too.
How Roof Age Fits In
Age is context, not a verdict. A roof near the end of its expected life with curling shingles and granule loss is ready to go. A roof the same age that lies flat, sheds water and has firm decking can keep working. Two roofs put on the same year can wear very differently.
What changes how long a roof lasts:
Material
Asphalt shingles wear out sooner than metal, tile or slate. Thicker architectural shingles generally outlast older flat three-tab shingles. If you are weighing materials for the next roof, see our comparison of metal roof vs shingle roof.
Sun and weather
The slope that faces the afternoon sun usually wears out first. Hail, high wind and heavy snow all take years off.
Attic ventilation
A hot, poorly vented attic bakes shingles from below. A roof can wear out early because of the attic, not the shingles.
Layers
Shingles laid over an older layer hold more heat and can wear faster than a single layer.
Where to find the year your roof went on
Look in your closing papers or home inspection report. Check for an old invoice from the roofer. Many cities and counties let you look up building permits by address online, and a re-roof usually needs a permit. Neighbors in homes built at the same time may also know when theirs was done.
Check This Today: Your Gutters and Downspouts
The one thing you can check
Look inside the gutters and at the ground below the bottom of each downspout. A lot of sand-like granules from the shingles means the shingles are wearing out. A brand new roof sheds some loose granules in its first months, which is normal. Heavy granules from an older roof is not. Then find the year the roof went on, from your closing papers or the old invoice. Bring both facts to the roofer.
Only check gutters you can reach safely from a short, steady ladder or from the ground. For high gutters, a gutter cleaning pro can clear them and tell you what they found.
What to Ask a Roofer Before You Agree to a New Roof
A replacement recommendation should be based on what the roofer saw, not on the age of the house. These questions get you there.
Can you show me photos of what you saw?
Ask for close-ups of the worn shingles, the leaks or the soft decking. Photos let you see the roof without climbing up and help you compare a second opinion.
Could a repair buy a few more years?
Sometimes the honest answer is yes. A repair now and a planned replacement later can make sense for your budget.
What is in the written scope?
Tear-off or overlay, underlayment, flashing, vents and how replacement decking is priced per sheet if they find rot.
Can I see your license and proof of insurance?
Rules differ by state and city. Ask for both and check the license with your state or local office where one is required.
Be careful with anyone who shows up at your door uninvited and says the whole roof has to come off today. A real problem will still be there tomorrow, and a second opinion is fair. If replacement is the answer, our new roof cost guide explains how those quotes are built.
Signs You Need a New Roof: Common Questions
How long does a roof last?
It depends on the material, the climate and how well the attic is ventilated. Asphalt shingles are the most common roof and last the shortest time of the main materials. Metal, tile and slate last much longer. Hot sun, hail, heavy snow and a poorly vented attic all shorten roof life. The manufacturer's paperwork for your shingles is a better guide than any general number.
Do a few missing shingles mean I need a new roof?
Usually not. A few shingles blown off in a storm can often be replaced if the rest of the roof lies flat and still has its granules. The bigger question is why they came off. If shingles are loose across a whole slope because the seal strips have failed with age, more will follow.
Do black streaks on my roof mean it needs replacing?
No. Dark streaks on shingles are usually algae growing on the surface. They look bad but are mostly cosmetic. Thick moss is different, because it holds moisture against the shingles and can lift them. Ask a roofer to check the shingles under any moss.
Can a new roof go over the old one?
Sometimes a second layer of shingles can be installed over the first, which skips tear-off. Many local building codes limit how many layers a roof can have, and an overlay hides the decking, so soft or rotted wood underneath goes unchecked. Ask the roofer to explain why they recommend one or the other.
How do I know if my roof is sagging?
Stand back from the house and look along the ridge and the lower edge of the roof. They should be straight lines. A dip in the ridge or waves between the rafters can mean wet decking or a structural problem. A sagging roof needs a pro to look at it soon, not at the next convenient time.
Can part of a roof be replaced instead of the whole thing?
Yes. If one slope takes the most sun or weather and is worn out while the rest is fine, a roofer may suggest re-roofing just that section. The new shingles may not match the old ones exactly in color, and you will be replacing the rest later. It is a fair option when budget is tight and the other slopes still have years left.
Get a Second Opinion on Your Roof
See our roofing services, or start with a roofer in your city.
Contractor Palace
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