At a glance: In short: 21.33 squares, GAF Timberline HDZ, synthetic underlayment across the full deck, ridge vent, lifetime workmanship warranty. Putnam Street, Alton, IL 62002, done September 22, 2026 by our St. Louis crew (314-429-6000).
Our crew finished a 21.33-square roof (2,133 square feet), about what a standard ranch house carries on Putnam Street in Alton, IL on Tuesday, September 22. Alton is a Madison County river city on the bluffs above the Mississippi, with a deep stock of older homes. It was one of 5 roof replacements our crews completed in Alton in September 2026. On top: GAF Timberline HDZ. Underneath: synthetic underlayment across the full deck plus ice and water membrane where water collects.
What the work order shows
| Location | Putnam Street (Alton, IL 62002) |
|---|---|
| Completed | Tuesday, September 22, 2026 |
| Opened to completed | 27 days |
| Roof size | 21.33 squares (about 2,133 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 | GAF Starter |
| Hip & ridge | GAF Hip & Ridge |
| Ventilation | Lomanco Omni Roll ridge vent |
| Warranty | Lifetime workmanship warranty |
| Project number | STL082626029 |
Want to see what GAF Timberline HDZ looks like on a whole house? Try every color in our GAF Timberline HDZ color selector.
The roofing system on this house
GAF Timberline HDZ is a laminated architectural shingle built with GAF LayerLock Technology, which bonds the shingle layers together, and a wide StrikeZone nailing area that gives the installer a large, clearly marked target. 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.
- Ice and water shield in the valleys and along the eaves. Those are the two places a Midwest roof takes on water first, from ice dams in January and heavy runoff in spring storms.
- GAF 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
This was a St. Louis office job, installed by our own crew, not subcontracted out. The job was opened in our system on August 26, 2026 and the crew finished on September 22, 2026, 27 days later. 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 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?
GAF GAF Timberline HDZ, 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.
Does John Beal Roofing work in Alton, IL?
Yes. Alton is served by our St. Louis office, and we've completed 16 roof replacements there in the last few months alone. Call 314-429-6000 for a free inspection.
How big was the roof on Putnam Street?
21.33 squares, or about 2,133 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.
Do you publish the customer's address?
No. We publish the street name, city and ZIP so you can see we really work in your neighborhood. We leave off the house number and never publish a customer's name.
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.