At a glance: In short: 44.67 squares, GAF Timberline HDZ, synthetic underlayment across the full deck, ridge vent, lifetime workmanship warranty. West Delmar Avenue, Godfrey, IL 62035, done October 21, 2026 by our St. Louis crew (314-429-6000).
This one was a big 44.67-square roof, about 4,467 square feet of surface on West Delmar Avenue in Godfrey, IL, a Madison County village just north of Alton. We replaced 1 other roof in ZIP 62035 that same month. On top: GAF Timberline HDZ. Underneath: synthetic underlayment across the full deck plus ice and water membrane where water collects.
Project record
| Location | West Delmar Avenue (Godfrey, IL 62035) |
|---|---|
| Completed | Wednesday, October 21, 2026 |
| Opened to completed | 50 days |
| Roof size | 44.67 squares (about 4,467 sq ft) |
| Scope of work | Full tear-off and roof replacement |
| Shingle | GAF — GAF Timberline HDZ |
| Underlayment | JBI Synthetic |
| Ice & water | Alco Ice & Water |
| Starter course | OC Starter |
| Hip & ridge | GAF Hip & Ridge |
| Ventilation | Lomanco Omni Roll ridge vent |
| Warranty | Lifetime workmanship warranty |
| Project number | STL090126019 |
Want to see what GAF Timberline HDZ looks like on a whole house? Try every color in our GAF Timberline HDZ color selector.
Materials installed, layer by layer
Timberline HDZ is GAF's architectural shingle with a wide StrikeZone nailing area and LayerLock Technology holding the two layers of the shingle together, so fasteners land where they hold best. Every one of our replacements is a system, not just shingles. On this roof, from the deck up:
- 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.
- GAF 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.
Who did the work
The crew came out of our St. Louis office. The job was opened in our system on September 1, 2026 and the crew finished on October 21, 2026, 50 days later. 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 Godfrey?
Free inspection, documented slope by slope, no obligation. St. Louis office: 314-429-6000
Common questions about this job
What shingle was installed on this Godfrey roof?
GAF GAF Timberline HDZ, over synthetic underlayment across the full deck. The full system is in the project details table above.
Does John Beal Roofing work in Godfrey, IL?
Yes. Godfrey is served by our St. Louis office, and we've completed 12 roof replacements there in the last few months alone. Call 314-429-6000 for a free inspection.
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 West Delmar Avenue?
44.67 squares, or about 4,467 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 Godfrey?
Our St. Louis office at 314-429-6000. A person answers 24 hours a day, including nights, weekends and holidays.