Asphalt shingles are one of the most common roofing choices for homeowners. They are familiar, widely available, and often feel like the default option. But over the years, we have talked with plenty of homeowners who chose shingles, then ended up dealing with frustrating problems that show up sooner than expected. If you are seeing warning signs or planning a roof replacement, here are five common asphalt shingle problems and why a metal roof from Otter-Tech can be a smarter long-term upgrade.
1) Blistering
Blistering looks like small raised bumps or popped spots on shingles. This sometimes happens when moisture gets trapped inside the shingle and expands in heat (Poor attic ventilation can make it worse). Blistering can also be mistaken for hail damage, which creates confusion during inspections and insurance conversations.
Why metal is better: Metal roofing is not made of layered asphalt and granules, so it is not prone to blistering the way shingles are. With the right roof system and ventilation, metal stays stable and consistent through hot summer weather.
2) Curling
Curling is when shingle edges lift or corners turn upward. Sheffield Metals notes that curling can be tied to aging shingles, installation issues, ventilation problems, or thermal shock when roof temperatures change quickly.
Why metal is better: Metal roofing panels are engineered for stability. You do not get the same edge curl that can lead to water entry and wind damage on shingle roofs.
3) Cracking
Cracked shingles are a common sign of aging and weather stress. Wind, roof movement, and temperature swings can all contribute. Sheffield Metals also points out that installation errors, product defects, and inadequate ventilation can play a role.
Why metal is better: Metal roofing is built to handle harsh conditions, including wind and temperature changes. When homeowners want a roof with fewer failure points over time, metal is often the best choice.
4) Granule Loss
Asphalt shingles rely on granules for protection. When those granules start washing off into gutters or leaving bare spots, the shingles wear out faster. Weathering, uneven asphalt application, overheating, and ventilation issues are just some of the causes.
Why metal is better: Metal roofing does not depend on granules to do its job. A quality metal roof gives you durable protection without the gradual shedding that shortens a shingle roof’s life.
5) Mold, Mildew, and Algae
Those dark streaks on a roof are often algae or other organic growth. This is common in humid areas and on shaded, north-facing roof sections.
Why metal is better: Metal roofing is a cleaner, more resilient surface. It is easier to maintain, and it does not provide the same environment that can make shingles look stained and worn before their time.
Ready for a roof you can feel confident about?
If your current shingle roof is curling, cracking, losing granules, or showing stains, it may be time to explore a stronger option. Otter-Tech provides Amish-built metal roofing designed for long-term performance and curb appeal. Call us today for a free estimate at (717) 789-3375, email info@otter-tech.com, or visit https://otter-tech.com. You can also reach us at Otter-Tech, Inc., 31 Industrial Road, Loysville, PA 17047. Let’s talk through your home, your goals, and your budget, then give you a clear, no-pressure quote you can trust.