At a glance: In short: 58.00 squares, GAF Timberline HDZ, synthetic underlayment across the full deck, ridge vent, lifetime workmanship warranty. Country Estates Drive, Columbia, IL 62236, done October 7, 2026 by our St. Louis crew (314-429-6000).
Our crew finished a large 58.00-square roof covering about 5,800 square feet on Country Estates Drive in Columbia, IL on Wednesday, October 7. Columbia is a Monroe County, Illinois city south of Dupo. We replaced 1 other roof in ZIP 62236 that same month. GAF Timberline HDZ went over synthetic underlayment across the full deck, with ice and water membrane at the eaves and valleys.
Project record
| Location | Country Estates Drive (Columbia, IL 62236) |
|---|---|
| Completed | Wednesday, October 7, 2026 |
| Opened to completed | 86 days |
| Roof size | 58.00 squares (about 5,800 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 | STL071326061 |
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
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. 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:
- A full layer of synthetic underlayment. It’s the backup water barrier under the shingles, and it holds up to foot traffic and wind far better than paper felt.
- Ice and water membrane at the eaves and in the valleys. This self-adhering layer goes where water backs up: behind ice dams at the eaves and where two slopes meet.
- 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. 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. From the day the job was opened (July 13, 2026) to the day the crew finished (October 7, 2026) took 86 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. If a storm opens up a roof at 2 a.m., someone answers the phone. See 24/7 emergency service.
Need a roof in Columbia?
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 Columbia 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?
86 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 Country Estates Drive?
58.00 squares, or about 5,800 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.
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.
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 Columbia?
Our St. Louis office at 314-429-6000. A person answers 24 hours a day, including nights, weekends and holidays.