At a glance: In short: 37.67 squares, GAF Timberline HDZ, synthetic underlayment across the full deck, ridge vent, lifetime workmanship warranty. Thornton Road, Pacific, MO 63069, done September 17, 2026 by our St. Louis crew (314-429-6000).
A large 37.67-square roof covering about 3,767 square feet on Thornton Road in Pacific, MO, a Franklin County city along I-44 at the county line. Crews closed it out on September 17, 2026. The system: synthetic underlayment across the full deck, ice and water membrane in the valleys and at the eaves, and GAF Timberline HDZ on top.
Job specs
| Location | Thornton Road (Pacific, MO 63069) |
|---|---|
| Completed | Thursday, September 17, 2026 |
| Opened to completed | 121 days |
| Roof size | 37.67 squares (about 3,767 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 | STL051926034 |
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.
The roofing system on this house
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. 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:
- 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.
- 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 on the hips and peak. Matching cap shingles made for the job, not field shingles cut into pieces.
- 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 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 (May 19, 2026) to the day the crew finished (September 17, 2026) took 121 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 Pacific?
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 Pacific roof?
GAF GAF Timberline HDZ, over synthetic underlayment across the full deck. The full system is in the project details table above.
Was ice and water shield installed?
Yes. Alco Ice & Water membrane went in the valleys and along the eaves, the spots where water backs up or collects first.
How long did this project take from start to finish?
121 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.
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 Pacific?
Our St. Louis office at 314-429-6000. A person answers 24 hours a day, including nights, weekends and holidays.