Decatur Roof Pros provides professional asphalt shingle roofs in Decatur, IL for residential and commercial properties across Macon County and the middle Sangamon valley. This is the page where we put in writing the thing most companies in this trade will only say quietly. On a one-layer Decatur house with a flat, sound deck, laying new shingles over the old ones is a legitimate roof, and quite often it is the one we recommend.
That is not a fringe position. The Asphalt Roofing Manufacturers Association's own bulletin on replacement versus recover says that where a roof has only one layer that lies flat and the decking is in good condition, a tear-off may not be needed, and it lists four conditions that force removal: rotted or warped decking with wide board gaps, more layers than allowed, sagging along ridge or truss lines, and shingles too distorted to flatten.
The major manufacturers publish installation instructions for it as well, including the nesting method where each new course is set into the butt line of the old one instead of bridging across it. Nesting gives a flatter finished plane and sheds water better than bridging, and it is what we do unless the existing exposure makes it impossible.
There are real trade-offs and we go through all of them before you decide. Nobody sees your decking. The workmanship warranty cannot reach the layer under the new one. The manufacturer's warranty language on the roof base beneath the product is worth reading with us rather than after the fact, and the top wind tiers generally require components installed on the deck itself, which a recover by definition does not have.
Against that sits the arithmetic of a market where the Census Bureau put the median owner-occupied home at 115,600 dollars in 2024 and median household income at 49,244. A tear-off on that house is roughly a tenth of what the whole thing is worth. A sound recover that buys fifteen years is not a corner being cut. It is a proportionate decision.
Where it is wrong we say so and we lose the sale. Two layers already up, curled tabs that will not flatten with feathering strips, a ridge line that is not straight, soft spots underfoot, or a deck of boards with gaps wide enough that new nails would be guessing. Any one of those and the answer is a tear-off, at which point the cheaper conversation is simply over.
Our licensed and insured team brings the right materials and equipment to every job — layer count established by lifting a tab at the rake and again at an eave, nesting a new course into the butt line of the covering below it, fasteners long enough to reach three quarters of an inch into the deck, bridging across a first layer instead of nesting into its exposure, beveled feathering strips nailed down to flatten a raised course, board sheathing overlaid with panel stock once the coverings come off — and backs the work with a written workmanship warranty. We serve Decatur and nearby communities including Mount Zion, Forsyth, Argenta, Maroa.
What We Handle
Everything our asphalt shingle roofs in Decatur covers
One crew, one point of contact, and the full range of asphalt shingle roofs work in Decatur, IL. If it is on this list we do it in house rather than handing it to a subcontractor:
- asphalt shingle roofing Decatur
- architectural shingles
- shingles over existing roof
- nail over roof
- nested shingle application
- laminated shingle install
- 3 tab vs architectural
- shingle roof cost Decatur
- recover shingle roof
- ARMA reroofing
- shingle roof life expectancy
Not sure which one describes your situation? Describe it in plain words and we will sort it out — or browse the rest of our Decatur services.
Materials, equipment and how we do asphalt shingle roofs
The difference between asphalt shingle roofs that lasts and asphalt shingle roofs that gets redone in three years is almost always preparation and materials, not the finish you see on day one. We work with layer count established by lifting a tab at the rake and again at an eave, nesting a new course into the butt line of the covering below it, fasteners long enough to reach three quarters of an inch into the deck, bridging across a first layer instead of nesting into its exposure, spec them to the job instead of to the invoice, and write the material grades into the free estimate so you know exactly what you are buying.
Every Decatur job runs the same way: site walk and measurements, written scope and fixed price, protection of the surrounding area, then the work itself with a daily clean-up. Years of roofing work in Macon County and the middle Sangamon valley means we have already met whatever your property is going to throw at us — awkward access, older construction, an HOA with opinions.
Where we do asphalt shingle roofs outside Decatur
Decatur Roof Pros covers Decatur and the surrounding communities of Macon County and the middle Sangamon valley. Crews run out to the same nearby cities every week, so an out-of-town job does not mean an out-of-town price.
- Asphalt Shingle Roofs in Mount Zion, IL — Macon County, population 6,019
- Asphalt Shingle Roofs in Forsyth, IL — Macon County, population 3,734
- Asphalt Shingle Roofs in Argenta, IL — Macon County, population 913
- Asphalt Shingle Roofs in Maroa, IL — Macon County, population 1,577
- Asphalt Shingle Roofs in Warrensburg, IL — Macon County, population 1,110
- Asphalt Shingle Roofs in Blue Mound, IL — Macon County, population 1,133
Start on the Decatur Roof Pros homepage for a free estimate, or call (844) 511-2320 and describe the job.
Why Decatur Chooses Decatur Roof Pros
- ✓We count the coverings on your roof before we price it, at a rake and again at an eave, and the number goes on the estimate. Nobody can quote a Decatur roof honestly without it, and most bids you will collect never mention yours at all.
- ✓At two applications we stop offering choices. The residential code the city adopted forbids a third, so there is one lawful job and one price, and we show you the doubled courses we found rather than asking you to take our word for it.
- ✓At one application we will quote the nail-over, which a lot of companies in this market refuse to put on paper because it is the smaller sale and the harder thing to be proud of.
- ✓Fastener length is a written line rather than a shop habit. A shingle going over an existing covering needs a longer nail to reach wood, and short nails on a re-cover are the failure we pull off houses here more than any other.
The standards behind asphalt shingle roofs
Quality here is not a matter of opinion — it is written down. The asphalt shingle roofs work we do in Decatur follows published industry standards: NRCA publishes the Roofing Manual, the industry's reference for details and slope minimums, and Asphalt Roofing Manufacturers Association sets the shingle application and ventilation guidance the warranties reference. If a contractor cannot tell you which standard a detail comes from, that is worth asking about before you sign.
Every asphalt shingle roofs project in Decatur gets the same attention, whether it is a single room or a full commercial job. We show up on schedule, keep the site clean, and stand behind the work — the estimate is free and there is no pressure.
Ready to get started? Call (844) 511-2320 for a free asphalt shingle roofs free estimate in Decatur, or request a quote and we'll get right back to you.