At a glance: John Beal Roofing replaced the roof on North 7th Street in Dupo, IL 62239, finishing September 11, 2026. 14.33 squares of Owens Corning OC Supreme, installed over synthetic underlayment across the full deck. Handled by our St. Louis office (314-429-6000).
On North 7th Street in Dupo, IL (a St. Clair County village on the American Bottom), the crew tore off and replaced a 14.33-square roof (1,433 square feet), about what a standard ranch house carries. It was our only Dupo roof of September. The system: synthetic underlayment across the full deck, ice and water membrane in the valleys and at the eaves, and OC Supreme on top.
What the work order shows
| Location | North 7th Street (Dupo, IL 62239) |
|---|---|
| Completed | Friday, September 11, 2026 |
| Opened to completed | 25 days |
| Roof size | 14.33 squares (about 1,433 sq ft) |
| Scope of work | Full tear-off and roof replacement |
| Shingle | Owens Corning — OC Supreme |
| Underlayment | JBI Synthetic |
| Ice & water | Alco Ice & Water |
| Starter course | OC Starter |
| Hip & ridge | OC ProEdge Hip & Ridge |
| Ventilation | Lomanco Omni Roll ridge vent |
| Warranty | Lifetime workmanship warranty |
| Project number | STL081726006 |
Choosing a color for your own roof? Browse every Owens Corning Supreme color on a whole-house preview in our OC Supreme color selector.
The roofing system on this house
Owens Corning Supreme is a traditional three-tab shingle, a flat, uniform look that suits smaller sections, outbuildings and homes that were originally built with three-tab. The shingle is only the top layer. Here’s the full system that went on this house:
- Synthetic underlayment, edge to edge. It doesn’t wrinkle or tear like felt, and it keeps the deck dry if a shower pops up mid-job.
- Self-sealing ice and water membrane where water concentrates. It seals around every nail driven through it, which matters in valleys and at the eaves.
- OC Starter strip along every edge. The first course is where wind gets under a roof. A factory starter with its own sealant line locks it down.
- OC ProEdge Hip & Ridge cap. Pre-formed cap that seals the hips and ridge.
- Lomanco Omni Roll ridge vent. Continuous exhaust at the peak. Together with the soffit intake, it moves heat and moisture out of the attic.
The crew behind this roof
This was a St. Louis office job, installed by our own crew, not subcontracted out. From the day the job was opened (August 17, 2026) to the day the crew finished (September 11, 2026) took 25 days. Family-owned since 1947, we back every replacement with a lifetime workmanship warranty. We answer the phone around the clock, storms included. See 24/7 emergency service.
Need a roof in Dupo?
Free inspection, documented slope by slope, no obligation. St. Louis office: 314-429-6000
FAQ about this roof
What shingle was installed on this Dupo roof?
Owens Corning OC Supreme, over synthetic underlayment across the full deck. The full system is in the project details table above.
How big was the roof on North 7th Street?
14.33 squares, or about 1,433 square feet of roof surface. A roofing square is 100 square feet. Roofs are measured and priced that way, not by the square footage of the floor plan.
Was ice and water shield installed?
Yes. Alco Ice & Water membrane went in the valleys and along the eaves, the spots where water backs up or collects first.
Does John Beal Roofing work in Dupo, IL?
Yes. Dupo is served by our St. Louis office, and we've completed 2 roof replacements there in the last few months alone. Call 314-429-6000 for a free inspection.
Who do I call about a roof in Dupo?
Our St. Louis office at 314-429-6000. A person answers 24 hours a day, including nights, weekends and holidays.