7 Signs You Need a New Roof (Don't Ignore #4)

Most roofs do not fail overnight. They send signals for months — sometimes years — before the first serious leak appears. The problem is that most homeowners do not know what to look for, and by the time water is dripping from the ceiling, the damage has already spread well beyond the roof itself.

Here are the seven signs that your roof is past the point of repair and needs replacement.

Age is the most reliable predictor of roof failure. Standard architectural asphalt shingles — the most common roofing material in Evansville — are rated for 25–30 years under ideal conditions. Indiana's climate is not ideal: freeze-thaw cycles, summer heat, hail, and high winds all accelerate aging.

If your roof is approaching or past 20 years, it deserves a professional inspection even if it looks fine from the ground. The visible surface is often the last thing to fail — the underlayment, flashing, and decking beneath it may already be compromised.

If you do not know the age of your roof, check your home inspection report from when you purchased the house, or ask a roofer to assess it during a free inspection.

Healthy shingles lie flat against the roof deck. When shingles begin to curl — either at the edges (cupping) or in the middle (clawing) — it signals that the shingles are drying out, losing their flexibility, and separating from the deck below.

Curling shingles are a moisture problem. They allow water to get underneath, which accelerates deterioration of the underlayment and decking. Once curling is widespread across the roof surface, repair is not cost-effective — you would be replacing shingles on top of compromised underlayment.

Asphalt shingles are coated with mineral granules that protect the asphalt layer from UV degradation and provide fire resistance. As shingles age, these granules loosen and wash off.

Check your gutters and downspout discharge areas. A moderate amount of granules in gutters is normal on a newer roof. Heavy granule accumulation — especially if it is increasing — on a roof that is 15+ years old signals that the shingles are nearing end of life.

You may also notice bald patches on the shingles themselves where the granules have worn away, leaving the dark asphalt layer exposed. This accelerates UV damage significantly.

This is the one most homeowners miss — and it is the most urgent.

Go into your attic on a bright day and turn off the lights. If you can see daylight coming through the roof boards, you have gaps in your roof system. Water, insects, and cold air are entering through those same gaps.

Also look for:

• Water stains or streaking on the attic rafters or sheathing
• Soft or spongy spots when you press on the decking from below
• Mold or mildew on insulation or wood surfaces

Any of these findings in the attic means water has been entering the home — possibly for a long time. The visible roof surface may look acceptable while the structure beneath it is actively rotting.

A healthy roof deck is flat and firm. If you notice dips, waves, or sagging sections when you look at the roof line from the ground, the decking beneath the shingles has been compromised by moisture.

Sagging is a structural issue, not just a cosmetic one. It means the plywood or OSB decking has softened and may no longer provide adequate support for the shingles above it. In severe cases, it can indicate damage to the rafters or trusses beneath.

A sagging roof deck cannot be repaired by replacing shingles. The decking — and potentially the framing — must be replaced. This is always a full replacement situation.

Flashing is the metal material that seals the transitions between your roof and vertical surfaces — chimneys, skylights, vent pipes, and dormers. It is the most common source of roof leaks, and it has a shorter lifespan than the shingles themselves.

Signs of flashing failure:

• Rust or corrosion on metal flashing
• Visible gaps or separation between flashing and the adjacent surface
• Cracked or missing caulk at flashing joints
• Water stains on interior walls or ceilings near chimneys or skylights

On an older roof, flashing failures are often a sign that the entire roof system is at end of life. Replacing flashing on a 22-year-old roof is like replacing the brakes on a car with a blown engine — you are investing in a system that is about to fail anyway.

Moss and algae growth on shingles is more than an aesthetic problem. Moss retains moisture against the shingle surface, accelerating deterioration and eventually lifting shingle edges as the root system grows beneath them. Algae (the black streaking common on north-facing slopes) indicates chronic moisture retention.

A small amount of algae on an otherwise healthy roof can be treated. Widespread moss growth on an aging roof — especially if it has been present for several years — is a sign that the shingles have been holding moisture for a long time and are likely compromised beneath the surface.

If you recognize one or two of these signs on a relatively young roof (under 15 years), a targeted repair may be appropriate. If you are seeing multiple signs — especially on a roof that is 18+ years old — replacement is almost certainly the more cost-effective path.

The only way to know for certain is a professional inspection. Rock's Roofs provides free roof inspections throughout Evansville, Newburgh, Henderson, Owensboro, and the Tri-State area. We will tell you honestly whether repair or replacement is the right call — and show you exactly what we found.

Call (812) 459-2139 or request a free inspection online.

Related reading:

• Roof Repair vs. Replacement: How to Know Which One You Need
• How Much Does a New Roof Cost in Evansville?
• Roof Inspection Checklist for Evansville Homeowners