At a glance: In short: 17.33 squares, OC Duration, synthetic underlayment across the full deck, ridge vent, lifetime workmanship warranty. Mayfield Road, St. Peters, MO 63376, done October 29, 2026 by our St. Louis crew (314-429-6000).
On Mayfield Road in St. Peters, MO (a St. Charles County city along I-70), the crew tore off and replaced a 17.33-square roof, right around the size of a typical single-story ranch. It was one of 5 roof replacements our crews completed in St. Peters in October 2026. On top: Owens Corning Duration. Underneath: synthetic underlayment across the full deck plus ice and water membrane where water collects.
Project record
| Location | Mayfield Road (St. Peters, MO 63376) |
|---|---|
| Completed | Thursday, October 29, 2026 |
| Opened to completed | 28 days |
| Roof size | 17.33 squares (about 1,733 sq ft) |
| Scope of work | Full tear-off and roof replacement |
| Shingle | Owens Corning — OC Duration |
| Underlayment | JBI Synthetic |
| Ice & water | Ice & water membrane |
| Starter course | Factory starter |
| Hip & ridge | Owens Corning Hip & Ridge |
| Ventilation | Lomanco Omni Roll ridge vent |
| Warranty | Lifetime workmanship warranty |
| Project number | STL100126013 |
Choosing a color for your own roof? Browse every Owens Corning TruDefinition Duration color on a whole-house preview in our OC Duration color selector.
Materials installed, layer by layer
Duration is Owens Corning's best-known architectural shingle. The engineered, woven SureNail strip across the nailing line is what sets it apart: it gives nails a defined target and grip. People shop for the shingle, but what’s underneath it and how the edges are finished decide how long the roof lasts. On this job:
- A full layer of synthetic underlayment. It’s the backup water barrier under the shingles, and it holds up to foot traffic and wind far better than paper felt.
- 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.
- Factory starter at the eaves and rakes. It’s a purpose-made starter strip with factory adhesive, not cut-up field shingles, so the edges stay sealed.
- Owens Corning 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 John Beal Roofing. From the day the job was opened (October 1, 2026) to the day the crew finished (October 29, 2026) took 28 days. Family-owned since 1947, we back every replacement with a lifetime workmanship warranty. If a storm opens up a roof at 2 a.m., someone answers the phone. See 24/7 emergency service.
Need a roof in St. Peters?
Free inspection, documented slope by slope, no obligation. St. Louis office: 314-429-6000
FAQ about this roof
What shingle was installed on this St. Peters roof?
Owens Corning OC Duration, over synthetic underlayment across the full deck. The full system is in the project details table above.
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.
How long did this project take from start to finish?
28 days from the day the job was opened to the day the crew finished. Most of that time is scheduling, material ordering and any insurance paperwork. The tear-off and install usually take a day or two on a house this size.
Was ice and water shield installed?
Yes. Ice and water membrane went in the valleys and along the eaves, the spots where water backs up or collects first.
Who do I call about a roof in St. Peters?
Our St. Louis office at 314-429-6000. A person answers 24 hours a day, including nights, weekends and holidays.