Which shingle should go on a roof that is about to carry solar panels again? If you live in Mokena and your array is coming off for a reroof, that question deserves more thought than picking a color from a sample board. The shingles you choose now will sit under the panels, mostly out of sight, for as long as the system produces. Getting them wrong means paying to remove and reinstall the array a second time. This guide walks through the choices that actually change the outcome: service life, shingle profile, hail resistance, what goes under the shingles, and how the roof meets the new solar mounts.
Why does shingle choice matter more when solar is going back on?
Shingle choice matters more under solar because the roof can no longer be replaced on its own schedule. Once the panels are reset, every future roof repair or replacement in the array area means taking the system off again first. A roof that wears out well before the panels do forces a second detach and reset, with all the labor, coordination and downtime that come with it.
The roofing industry says this directly. The National Roofing Contractors Association, in announcing its white paper on PV-ready roofs, points to choosing roofing materials and systems whose service lives match or exceed that of the solar installation. The U.S. Department of Energy makes the same point from the solar side: its homeowner’s guide to going solar tells homeowners to consider the age of the roof and how long until it will need replacement.
For a Mokena homeowner who already owns a system, the logic runs in reverse. The panels are a fixed part of the house now. The new roof is the piece you can still choose, so choose it to outlast what sits on top of it.
How long should the new shingles last compared to the array?
The new shingles should be rated to last at least as long as the remaining useful life of your solar system, and ideally longer. Start by finding out roughly how old your array is and what your panel paperwork says about expected service life. Then ask your roofer what service life each shingle line on the table is designed for, and get that in writing with the estimate.
There is no single right number, because every system is a different age. A homeowner with a young array has many years of production ahead and should lean toward the longest-lived shingle the budget allows. A homeowner with an older system may weigh things differently, especially if replacing the panels themselves is on the horizon. Either way, the comparison should be made on paper before the tear-off begins, not after the panels are already back up.
Remember that the roof under an array ages differently from the exposed slopes. The panels shade the shingles from direct sun, but they also hold leaves, shed snow in sheets along their lower edges and concentrate runoff. Ask the roofer to think about the whole roof, not only the sections you can see from the driveway.
Architectural or three-tab: which shingle profile suits a solar roof?
Most homeowners reroofing under solar end up choosing between a standard three-tab shingle and a laminated, often called architectural or dimensional, shingle. The difference is construction. Three-tab shingles are a single layer cut into uniform tabs. Laminated shingles bond two or more layers together, which makes them thicker and gives the roof a textured look.
For a solar roof, the practical questions are durability and how cleanly the mounts can be flashed into the courses. Compare the designed service life printed in each product’s literature rather than assuming, since that number is what has to line up with the years left on the array. The flashing at each solar attachment slides under the course above it and over the course below, so the crew resetting the panels needs a roof laid out evenly and consistently. Any shingle installed correctly can accept flashed mounts. What matters is that the roofer and the solar crew agree on the plan before the first bundle goes up.
| Option | What it is | How it fits a roof that carries solar |
|---|---|---|
| Three-tab shingle | A single layer cut into even tabs, flat in appearance | Usually the lower upfront price; check its designed service life carefully, because a short-lived roof can mean a second detach before the array is retired |
| Laminated (architectural) shingle | Two or more layers laminated together with a textured, dimensional look | A common choice for long-life roofs; thicker courses accept flashed mounts when the layout is planned with the solar crew |
| Impact-rated laminated shingle | A laminated shingle built and tested for hail resistance | Worth pricing in hail-exposed areas; ask how it performed in independent testing, not only what the label says |
Are impact-resistant shingles worth it in Will County?
Impact-resistant shingles are worth pricing for a Mokena roof, because hail is a regular part of severe weather in this part of Illinois. The National Weather Service office in Chicago keeps a 75-year hazard breakdown for its forecast area, and it counts 2,106 damaging hail reports from 1950 through 2024. The same table lists a maximum reported hail size of 3.00 inches for Will County. Hail does not discriminate between exposed slopes and the shingles under an array, and a damaged roof under solar means another removal.
Labels alone do not tell the whole story. The Insurance Institute for Business and Home Safety tests impact-resistant shingles bought off retail shelves, firing lab-made hailstones at them rather than steel balls. In its most recent impact-resistant shingle ratings, IBHS evaluated 24 products. Most earned a Good rating and none achieved Excellent. In other words, products sold as impact-resistant are not all equal, and it pays to look up how the specific line your roofer proposes performed.
Ask your insurer, too. Some policies treat impact-rated roofing differently, but that depends entirely on the carrier and the policy, so confirm it directly rather than assuming.
What should go under the shingles on a solar roof?
The layers under the shingles matter as much as the shingles themselves, because they protect the deck where every solar mount is fastened. A complete roof system includes the deck, underlayment, ice barrier at the eaves where required, flashing at walls, valleys and vents, drip edge and ventilation. Ask your roofer to itemize each one in the estimate.
Chicago-area winters make the eaves a special concern. Snow that slides off an array piles up along the lower edge of the panels and the gutters, and ice that forms along the cold eave edge can back meltwater up under the shingles. Whether an ice barrier is required at the eaves, and how far up the roof it must run, depends on the code the village has adopted. Confirm the current requirement with the Village of Mokena building department before work starts.
Tear-off is also the one chance to inspect the deck. With the panels already off, any soft or damaged sheathing in the array area can be replaced while it is exposed. Once the mounts go back in, those boards are covered again for the life of the system.
How does the shingle choice affect the solar mounts and flashing?
The shingle choice shapes how the new mounts are flashed, which is the detail that keeps the roof dry once the panels return. When the array is reset on a new roof, the old attachment holes are gone with the old shingles. New mounts are set through the new roof into the framing, and each one gets flashing woven into the shingle courses.
That is why the roofer and the solar crew need to talk before the roof goes on. The solar crew needs to know the shingle line, its exposure and where the rafters fall under the array. The roofer needs to know where the mounts will land so courses can be laid to suit. When the sequence is planned up front, as it is with a coordinated roof replacement under solar, the reset goes onto a roof built to receive it rather than one that has to be worked around.
It also helps to keep the original panel layout drawing and photos from before the detach. A crew following the original layout can match the array to the electrical plan the utility and the village already approved.
Settling the Shingle Question Before the Tear-Off
The deciding factor is simple: pick the shingle that will still be sound when your panels are ready to retire. Find out how old your array is, ask your roofer for the designed service life of each option in writing, and check how any impact-rated line performed in independent testing. Then confirm the eave and underlayment requirements with the village and make sure the estimate lists every layer, not only the shingle name.
The last step is getting the roofer and the solar crew talking before the dumpster arrives. If you want the panels off, stored and reset on new flashing around your roofer’s dates, our solar detach and reset service is built for that, and Solar Panel Removal Mokena can walk you through how it fits with the reroof. You can also browse more about the sequence on our home page.