Most homeowners don't think about their roof until water is dripping onto the kitchen floor. By that point, a repair has often turned into a full replacement — plus water damage to deal with. The good news: your roof usually gives you plenty of warning. Here's what to look for.
1. Your Roof Is Over 20 Years Old
Standard 3-tab asphalt shingles have a lifespan of 15–20 years. Architectural shingles stretch to 25–30. If your roof is approaching or past those numbers, it's worth scheduling an inspection even if everything looks fine from the ground. Age alone doesn't mean replacement, but it means the clock is ticking.
2. Curling or Buckling Shingles
When shingles start curling at the edges or buckling in the middle, it usually means the material is drying out and losing flexibility. This happens with age and heat exposure. Curled shingles are much more likely to blow off in the 60+ mph winds Iowa sees during spring storms. If you see this pattern across your roof, a replacement is likely overdue.
3. Missing Shingles After a Storm
A few missing shingles after a storm can be repaired. When you're finding shingles in the yard after every significant wind event, it's a sign the roof system as a whole is weakening. A repair might buy you a season or two, but if the underlying decking or fasteners are compromised, full replacement is the smarter long-term investment.
4. Granules in Your Gutters
Asphalt shingles are coated with granules that protect the material from UV damage. When those granules start shedding — you'll notice them collecting in your gutters or downspout discharge — it means the shingles are nearing the end of their useful life. A little granule loss is normal on a new roof. Heavy, consistent granule loss on an older roof is a warning sign.
5. Daylight in the Attic
On a bright day, go up to your attic and turn off the light. If you can see daylight coming through the roof boards, you have gaps that are letting in water, pests, and outside air. This is urgent — don't wait on this one. Even if it's not raining in, a gap in the roof structure means water damage is coming.
6. Sagging Roof Deck
A sagging or drooping area on your roof is a serious structural sign. It usually means the decking has been compromised by moisture — often from a slow leak that went undetected for a long time. Sagging areas need to be addressed immediately. This typically requires not just new shingles but replacement of the damaged decking underneath.
7. Moss or Algae Growth
Black streaks or green moss patches on your roof aren't just ugly — they indicate moisture is being retained, which accelerates shingle breakdown. Iowa's humid summers make this especially common on north-facing roof sections that don't get much sun. Moss can sometimes be treated and cleaned, but on older roofs it often signals the shingles are holding moisture they shouldn't be.
If you're seeing two or more of these signs, it's worth getting a professional inspection before the next storm season. We offer free inspections throughout Eastern Iowa — no obligation, just a straight assessment of what your roof actually needs.