Signs You Need a New Roof

The six signs that matter most

Most roof failures do not happen suddenly — they show warning signs for months or years before a leak actually appears inside the house. Here is what to check, roughly in order of how early each sign tends to show up.

1. Granule loss and curling shingles

Asphalt shingles are coated with granules that protect the underlying asphalt from UV exposure. As a roof ages, especially under Boise’s intense high-altitude sun, those granules wear away, leaving bald or thinning patches. Curling or cupping shingle edges are a related sign — the asphalt mat is drying out and losing flexibility. Check your gutters too; a heavy buildup of loose granules is a visible clue that the shingles above are shedding faster than normal.

2. Daylight visible through the roof deck

From inside the attic, on a sunny day with the lights off, look up at the underside of the roof deck. Any pinpoints of visible daylight mean there are gaps in the decking or roofing material large enough for water to follow the same path in the other direction. This is one of the more serious signs on this list and worth acting on quickly.

3. Soft or spongy spots

Walking the roof and feeling give underfoot, or noticing a visibly sagging section from the ground, points to deck damage — usually rot from long-term moisture intrusion. This typically means deck sheathing repair is needed, not just new shingles on top of a compromised structure.

4. Missing shingles or exposed nail heads after wind

The Treasure Valley sees straight-line wind events exceeding Wind Advisory criteria roughly seven times a year, almost always thunderstorm-outflow gusts. After any significant wind event, a ground-level check for shingles in the yard, missing tabs, or exposed nail heads is worth doing — exposed nails are a direct path for water intrusion even when the roof looks intact otherwise.

5. Interior water stains

Water stains on ceilings, especially clustered near roof valleys, chimneys, or where two roof planes meet, are usually the first sign homeowners notice, but they mean the problem has already been developing for a while by the time they show up. A single isolated stain can sometimes be a flashing repair rather than a full replacement; recurring or multiple stains point toward broader roof failure.

6. Age 20-plus, especially from the building-boom era

Age alone is a legitimate reason to have a roof inspected even without visible symptoms. Boise metro grew more than 45% in the 1990s and roughly another third in the 2000s, and a large share of that housing stock has never been reroofed. Even a shingle rated for 25 to 30 years shows real wear here closer to the 15 to 25-year mark, driven by high-desert UV exposure and one of the widest summer-to-winter temperature swings in the Pacific Northwest. If your roof dates to that building wave, an inspection is worth scheduling before symptoms appear, not after.

Quick self-check table

Sign	What it usually means
Granule loss, curling shingles	Weathering, likely nearing end of service life
Daylight through the deck	Active gap — moisture risk, act soon
Soft or spongy spots	Deck rot, likely needs sheathing repair
Missing shingles after wind	Exposed nail heads, direct leak risk
Interior water stains	Leak already active, source may be elsewhere on roof
Roof age 20+	Worth an inspection even with no visible symptoms

When it is repair, not replacement

Not every one of these signs means a full replacement. A handful of missing shingles after one wind event, or a single water stain traced to one bad flashing detail, is often a legitimate repair. Our guide on repair versus replacement walks through how that decision gets made in more detail.

Bottom line

One or two of these signs is worth a phone call. Several at once, a roof at the 20-year mark, or any sign of active water intrusion is worth a same-week inspection. A free on-site visit gets you a straight answer on whether you are looking at a repair or a replacement, with no pressure either way. Call (208) 279-6903 to get your roof checked.