Algae Streaks, Granule Loss, Curling: What It Really Means

Dark streaks that were not there last season. Little sand-like granules collecting near the downspouts. Shingle edges that look like they are starting to lift. It is the kind of stuff that makes you pause every time you pull into the driveway.

If you are considering asphalt shingle roofing services in Keene, NH, these visible changes can help you tell the difference between normal wear and a roof asking for attention.

Not every symptom points to a full replacement. Patterns usually tell a story about moisture, sun exposure, ventilation, and age, and this guide breaks down what each sign tends to mean.

What Algae Streaks Say About Your Roof | Asphalt shingle roofing services in Keene, NH

Those dark streaks are often algae staining, not dirt, and they tend to show up where a roof stays damp longer. Shaded sections and north-facing slopes dry more slowly, which gives algae more time to grow and leave discoloration behind.

In many cases, the staining is primarily cosmetic. Still, it can be a helpful clue that moisture is lingering on the roof surface more than it should. Gentle cleaning can improve appearance, but aggressive washing or covering up stains without checking the roof can mask early wear.

If streaks are spreading fast or you are seeing other symptoms too, a quick inspection adds clarity.

Also Read: Winter Factors That Shorten Roof Life in New Hampshire

Granule Loss: Normal Wear or a Red Flag?

Granules are the protective top layer on asphalt shingles. They help shield the shingle from UV damage, slow down cracking, and add fire resistance.

A little loss over time is normal, but heavy shedding deserves a closer look, especially if you are pricing asphalt shingle roofing services in Keene, NH.

• A light sprinkle of granules after a fresh install or a big storm
• Thick buildup in gutters, at downspout exits, or along driveway edges
• Bare looking shingle patches where the surface seems worn smooth
• Faster fading or uneven color changes across one roof section

If granules are disappearing quickly, shingles age faster in the sun and become more prone to cracking and leaks. A quick inspection helps you decide whether a repair is enough or a bigger plan makes more sense.

Curling Shingles and What They Signal | Asphalt shingle roofing services in Keene, NH

Curling shingles usually show up in two ways. Edge curling is when corners or sides start lifting. Cupping is when the middle dips and the edges rise, giving the shingle a slight bowl shape. Both can be tied to heat, trapped moisture, ventilation issues, or simple age.

Once shingles curl, they do not lie flat and seal as tightly, which makes them easier for the wind to grab. Small, isolated areas can sometimes be repaired if the rest of the roof is in good condition.

If curling is widespread, it often points to a roof that is nearing the end of its service life.

When Visual Damage Means It’s Time to Call a Pro

Some roof changes are harmless on their own, but patterns matter. If you are seeing multiple issues and considering asphalt shingle roofing services in Keene, NH, it is worth getting a professional set of eyes on it.

• Streaks, granule loss, and curling are showing up together
• Water marks on ceilings or walls that match the roof problem areas
• Damp attic smells, moldy insulation, or visible wood staining
• Repeated small leaks that keep coming back

An inspection helps you plan the right fix early, instead of reacting after the next heavy rain.

Know What Your Roof Is Telling You – And Book Soon!

Roof symptoms are easier to handle when you catch them early and understand what they mean. Guyer & Son Roofing brings experienced crews, sharp roof insight, and dependable service across the region, so you get clear answers without pressure.

Call (603) 876-9915 to schedule an inspection or get a free quote, and we’ll walk you through what we see and what it means for your home.