At a glance: In short: 35.67 squares, OC Duration, synthetic underlayment across the full deck, ridge vent, lifetime workmanship warranty. Marigold Drive, O'Fallon, IL 62269, done October 20, 2026 by our St. Louis crew (314-429-6000).
On Marigold Drive in O'Fallon, IL (a fast-growing St. Charles County city along I-70 and Highway K), the crew tore off and replaced a large 35.67-square roof covering about 3,567 square feet. It was our only O'Fallon roof of October. On top: Owens Corning Duration. Underneath: synthetic underlayment across the full deck plus ice and water membrane where water collects.
Project record
| Location | Marigold Drive (O'Fallon, IL 62269) |
|---|---|
| Completed | Tuesday, October 20, 2026 |
| Opened to completed | 200 days |
| Roof size | 35.67 squares (about 3,567 sq ft) |
| Scope of work | Full tear-off and roof replacement |
| Shingle | Owens Corning — OC Duration |
| Underlayment | JBI Synthetic |
| Ice & water | Alco Ice & Water |
| Starter course | IKO Starter |
| Hip & ridge | Owens Corning Hip & Ridge |
| Ventilation | Lomanco Omni Roll ridge vent |
| Warranty | Lifetime workmanship warranty |
| Project number | STL040326005 |
Want to see what OC Duration looks like on a whole house? Try every color in our OC Duration color selector.
What went on this roof
Owens Corning TruDefinition Duration uses SureNail Technology, a woven strip across the nailing zone that gives the fasteners something to grab and helps the shingle stay down in high wind. The shingle is only the top layer. Here’s the full system that went on this house:
- Synthetic underlayment over the whole deck. It’s stronger and more tear-resistant than felt, and it lies flat if weather rolls in during the tear-off.
- Ice and water membrane at the eaves and in the valleys. This self-adhering layer goes where water backs up: behind ice dams at the eaves and where two slopes meet.
- IKO 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.
- Owens Corning Hip & Ridge cap. Pre-formed cap that seals the hips and ridge.
- Lomanco Omni Roll ridge vent. It runs along the peak and lets hot, damp attic air escape. That protects the decking and keeps shingles from baking from below.
Who installed it
The crew came out of our St. Louis office. From the day the job was opened (April 3, 2026) to the day the crew finished (October 20, 2026) took 200 days. John Beal Roofing has been family-run since 1947, and our lifetime workmanship warranty covers the installation for as long as you own the home. We answer the phone around the clock, storms included. See 24/7 emergency service.
Need a roof in O'Fallon?
Free inspection, documented slope by slope, no obligation. St. Louis office: 314-429-6000
FAQ about this roof
What shingle was installed on this O'Fallon roof?
Owens Corning OC Duration, over synthetic underlayment across the full deck. The full system is in the project details table above.
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.
What kind of ventilation went on this roof?
A Lomanco Omni Roll ridge vent along the peak. Paired with soffit intake, it lets hot, moist attic air escape.
Does John Beal Roofing work in O'Fallon, IL?
Yes. O'Fallon is served by our St. Louis office, and we've completed 3 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 O'Fallon?
Our St. Louis office at 314-429-6000. A person answers 24 hours a day, including nights, weekends and holidays.