Summer in Indiana is no joke. Between the humidity, the heat index pushing into the triple digits, and the pop-up storms that roll through the Wabash Valley without much warning, your roof takes a beating from June through August. The problem is that most homeowners do not realize their roof is failing until a leak shows up — by which point they are dealing with water damage, mold, and a repair bill that is much larger than it needed to be.
The good news is that a failing roof almost always shows warning signs before it fails completely. If you know what to look for, you can catch these issues in the spring — before summer turns a manageable situation into an emergency. Knowing when your roof needs replacing before summer arrives can save you thousands.
Here are seven signs your roof may need replacing before the heat hits this year.
1. Your Roof Is 20 Years Old or More
This one is straightforward. Most asphalt shingle roofs in Indiana are designed to last between 20 and 25 years under normal conditions. If your roof was installed in 2005 or earlier, it is either approaching or already past its expected lifespan.
Age alone does not mean your roof needs to be replaced immediately — but it does mean you should be watching it closely. A roof that has lasted 20+ years in Indiana’s climate has been through hundreds of freeze-thaw cycles, multiple storm seasons, and years of UV exposure. Even if it looks fine from the ground, the underlying structure may be weakened in ways that are not visible without a professional inspection.
If you live in Avon, Terre Haute, or Plainfield and your roof is approaching the 20-year mark, a free inspection from Guarantee Roofing is the most important thing you can do before summer arrives.
2. You See Shingles That Are Curling, Cracking, or Missing
Walk around the perimeter of your home and look up. Healthy shingles should lie flat and uniform against the roof deck. If you notice shingles that are curling at the edges, cupping upward in the center, or cracking across the surface, those are signs that the shingles are drying out and losing their structural integrity.
Missing shingles are even more urgent. Every missing shingle is an exposed section of roof deck that is vulnerable to water intrusion. One heavy summer storm — and Indiana sees plenty of them — can push water under the surrounding shingles and into your attic before you even know there is a problem.
In older neighborhoods across Terre Haute and Avon, curling and cracking shingles are one of the most common things we see during spring inspections. Do not wait until the storm hits to find out what condition yours are in.
3. Your Gutters Are Full of Granules
This one surprises a lot of homeowners. Check your gutters after the next rain. If you see a layer of dark, sand-like granules accumulated at the bottom or washing out through the downspouts, that is a serious warning sign.
Asphalt shingles are coated with granules that protect the asphalt layer underneath from UV damage. As shingles age, they shed these granules — and when they start going, they go fast. A roof that is shedding significant granule volume is exposing its asphalt layer to direct sun, which accelerates deterioration dramatically.
Indiana summers are particularly hard on granule-depleted shingles because the UV index is high for extended stretches. A roof that might limp through another mild year can deteriorate rapidly under a hot Indiana summer without its protective granule coating intact.
4. You Notice Daylight in Your Attic
On a bright day, go up into your attic and turn off the lights. If you can see daylight coming through the roof boards, you have gaps — and gaps that let light in also let water in.
While you are up there, look for water stains, dark streaks, or any sign of moisture on the wood. Even if the roof is not actively leaking, old water staining indicates that water has gotten in at some point and the structural integrity of the decking may be compromised.
This is one of the quickest and most revealing checks a homeowner can do on their own, and it costs nothing but a few minutes and a flashlight.
5. Your Energy Bills Have Climbed Without Explanation
This one catches people off guard. If your summer cooling bills have been creeping up year over year without a change in your habits or equipment, your roof may be part of the reason.
A healthy roof with intact shingles and proper ventilation reflects solar heat and helps regulate the temperature in your attic. A roof with compromised shingles, poor ventilation, or deteriorating insulation can allow your attic to reach temperatures of 150 degrees or more on a hot Indiana summer day — which radiates heat directly into your living space and forces your HVAC system to work harder.
Homeowners in Plainfield and Avon who have had their roof replaced have often reported a noticeable improvement in their summer energy bills the following year. A new roof is not just about keeping water out — it is also about keeping your home efficient.
6. The Roof Looks Wavy or Uneven From the Ground
A healthy roof deck should appear flat and consistent when you look at it from the street. If you notice sections that look wavy, sagging, or uneven, that is a sign that the decking underneath the shingles is damaged — likely from moisture infiltration that has caused the wood to swell, rot, or warp.
Sagging sections are a structural concern, not just a cosmetic one. Water finds low points, and a sagging section of roof is exactly where standing water accumulates during and after rain. Left unaddressed, a sagging roof can deteriorate rapidly — especially under the weight of summer storms that drop heavy rain in short bursts.
If you see any sagging at all, call for an inspection immediately. This is not a situation where waiting a few months is a safe option.
7. Your Roof Has Had Multiple Repairs in Recent Years
There is a point with any aging roof where the cost of continued repairs exceeds the cost of replacement — and more importantly, where additional repairs stop providing reliable protection.
If you have had shingles replaced in multiple spots, had flashing repaired around your chimney or vents, or dealt with recurring leaks in the same area, your roof may be telling you something. Individual repairs can extend the life of a relatively healthy roof, but they cannot reverse the aging process across the entire surface. At some point, a full replacement is the more economical and reliable long-term solution.
A good rule of thumb: if repair costs have exceeded $1,500 in the past two years on a roof that is older than 15 years, a replacement conversation is worth having before the next storm season.
What to Do If You Recognize These Signs
If one or more of these applies to your home in Terre Haute, Avon, or Plainfield, the best first step is a professional inspection — not a repair call, and not a sales visit. A thorough inspection gives you an honest picture of what you are working with: what needs attention now, what can wait, and whether replacement makes more sense than continued repair.
At Guarantee Roofing and Fence, we have been doing exactly this for homeowners across the Wabash Valley since 1919. Our inspections are free, our estimates are honest, and we will never tell you that you need a new roof if you do not.
Call us at (812) 234-2605, or get a free estimate online at CallGuarantee.com.
Do not wait until the first summer storm to find out what your roof is really worth.