At a glance: Completed October 8, 2026: a full tear-off and replacement on Langdon Street, Alton, IL. Shingle: OC Duration. Size: 19.67 squares. Underlayment: 15 lb felt underlayment. Office: St. Louis, 314-429-6000.
On Langdon Street in Alton, IL (a Madison County river city on the bluffs above the Mississippi, with a deep stock of older homes), the crew tore off and replaced a 19.67-square roof, right around the size of a typical single-story ranch. It was one of 4 roof replacements our crews completed in Alton in October 2026. OC Duration went over 15 lb felt underlayment, with ice and water membrane at the eaves and valleys.
What the work order shows
| Location | Langdon Street (Alton, IL 62002) |
|---|---|
| Completed | Thursday, October 8, 2026 |
| Opened to completed | 29 days |
| Roof size | 19.67 squares (about 1,967 sq ft) |
| Scope of work | Full tear-off and roof replacement |
| Shingle | Owens Corning — OC Duration |
| Underlayment | 15 lb felt |
| 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 | STL090926008 |
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.
The roofing system on this house
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. 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:
- 15 lb felt underlayment. Felt went down over the deck under the shingles.
- 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.
- Factory 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 (September 9, 2026) to the day the crew finished (October 8, 2026) took 29 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 Alton?
Free inspection, documented slope by slope, no obligation. St. Louis office: 314-429-6000
FAQ about this roof
What shingle was installed on this Alton roof?
Owens Corning OC Duration, over 15 lb felt underlayment. The full system is in the project details table above.
How long did this project take from start to finish?
29 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.
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 big was the roof on Langdon Street?
19.67 squares, or about 1,967 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.
Who do I call about a roof in Alton?
Our St. Louis office at 314-429-6000. A person answers 24 hours a day, including nights, weekends and holidays.