New Construction Roofing Sequence
The new construction roofing sequence in Metro East Illinois follows a specific order for good reason — and getting it wrong causes problems that don’t show up until long after the siding is on. If you’ve driven past a job site in Caseyville or Shiloh and noticed a fully shingled roof on a home that still had green ZIP System sheathing on the walls, that’s not an unfinished job. That’s a properly staged build.
At Barringer Brothers Roofing, we coordinate with builders across St. Clair, Madison, and Monroe Counties on new home projects. Because we see this question often, we want to break down why the roof always comes first — and what’s at stake when that sequence gets skipped or rushed.
The Roof Comes First Because It Protects Everything Else
Once shingles are down, the home’s interior is protected from rain. Without a completed roof, a single spring storm can soak dimensional lumber, warp engineered wood products, and push a project back by weeks. Additionally, mold can begin forming in saturated framing within 24 to 48 hours — a problem that’s expensive to remediate and easy to avoid.
In the Metro East, spring weather consistently brings heavy rain and hail. Getting a roof installed early isn’t just good practice. It’s risk management.
Flashing Is the Detail Most Homeowners Never See
However, weather protection isn’t the only reason the roof goes on first. The more technical reason involves flashing — the metal material that seals every intersection where a roof plane meets a vertical wall.
Step flashing and counter-flashing at dormers, sidewall tie-ins, and garage connections must be set as part of the roofing installation. The siding then gets installed over that flashing. Because of this, reversing the order creates two bad options: tear off completed siding to install flashing properly, or leave an improperly lapped connection that will eventually leak. Neither outcome is acceptable on a quality build.
What ZIP System Sheathing Is Actually Doing on Site
The green panels visible on unfinished homes throughout the Metro East are ZIP System sheathing — a structural panel with a built-in weather-resistant barrier. Once the seams are taped, the assembly provides reliable temporary protection while trades are still sequencing in.
Furthermore, ZIP System is specifically engineered to hold up during the construction window between sheathing and siding installation. It’s not a permanent weather barrier, but it buys the job site the time it needs for roofing, rough mechanicals, and inspections to happen in the right order.
When Barringer Brothers is on a new construction job, we schedule our work to slot in after sheathing is complete and before the siding crew arrives — so no phase of the project is left exposed longer than necessary.
Why Your Roofing Contractor Choice Affects the Whole Timeline
Many homeowners focus their attention on framing, cabinets, and finishes — but the roofing contractor your builder selects has an outsized impact on the project schedule. A crew that misses their window delays every trade that follows. Moreover, sloppy flashing work at the wall intersections creates warranty voids and leak paths that may not show up for a year or more.
When you work with Barringer Brothers on a new construction project in Caseyville, O’Fallon, Shiloh, or the surrounding communities, you get a team that coordinates directly with your builder’s schedule, installs proper step and counter-flashing at every roof-to-wall intersection, and delivers a clean, inspection-ready system before the next trade steps in.
Shingle Selection Is Easier When You’re Starting From Scratch
New construction also gives you an advantage that re-roofing jobs don’t: a completely open choice on shingle color, profile, and warranty tier. You can match your exterior palette from the ground up, choose a Class 4 impact-resistant shingle that may qualify for an insurance discount, or select an extended warranty product — without working around an existing roof or trying to match weathered shingles.
The home pictured features a dark charcoal architectural shingle that suits the craftsman-style roofline well. That combination of steeply pitched gables and an attached garage wing is common in newer Caseyville and Shiloh subdivisions. Consequently, shingle color tends to carry more visual weight on these homes than on simpler roof profiles.
For reference, the Asphalt Roofing Manufacturers Association (ARMA) offers guidance on shingle selection factors including wind and impact ratings — a useful starting point if you’re comparing products.
Ready to Talk Through Your New Construction Project?
Whether you’re a builder scheduling subcontractors or a homeowner working with a custom builder in the Metro East, Barringer Brothers Roofing has been part of the new construction roofing sequence across Metro East Illinois since 2004. With 200+ five star reviews, we serve Caseyville, Belleville, O’Fallon, Collinsville, Edwardsville, and the surrounding communities with high quality service and exceptional customer service.
To get started, give us a call at (618)703-3036 or fill out our contact form. We’re happy to walk you through shingle options and coordinate directly with your builder.
