At a glance: Completed September 25, 2026: a full tear-off and replacement on Lawn Avenue, St. Louis, MO. Shingle: GAF Timberline HDZ. Size: 22.00 squares. Underlayment: synthetic underlayment across the full deck. Office: St. Louis, 314-429-6000.
On Lawn Avenue in St. Louis, MO (south city, in the Southampton and Lindenwood Park area), the crew tore off and replaced a 22.00-square roof, the size of a larger ranch or a modest two-story. It was one of 27 roof replacements our crews completed in St. Louis 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 | Lawn Avenue (St. Louis, MO 63139) |
|---|---|
| Completed | Friday, September 25, 2026 |
| Opened to completed | 37 days |
| Roof size | 22.00 squares (about 2,200 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 | STL081926055 |
Choosing a color for your own roof? Browse every GAF Timberline HDZ color on a whole-house preview in our GAF Timberline HDZ color selector.
Materials installed, layer by layer
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. 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.
- 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.
- 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. From the day the job was opened (August 19, 2026) to the day the crew finished (September 25, 2026) took 37 days. 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 St. Louis?
Free inspection, documented slope by slope, no obligation. St. Louis office: 314-429-6000
Questions homeowners ask about this project
What shingle was installed on this St. Louis roof?
GAF GAF Timberline HDZ, over synthetic underlayment across the full deck. The full system is in the project details table above.
How long did this project take from start to finish?
37 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.
How big was the roof on Lawn Avenue?
22.00 squares, or about 2,200 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.
Does John Beal Roofing work in St. Louis, MO?
Yes. St. Louis is served by our St. Louis office, and we've completed 102 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 St. Louis?
Our St. Louis office at 314-429-6000. A person answers 24 hours a day, including nights, weekends and holidays.