GAF and Owens Corning are the #1 and #2 shingle manufacturers in North America. Between them, they roof the majority of American homes. We install both in Savannah and coastal Georgia, and we have clear opinions about when each one shines.
Quick Comparison
| Feature | GAF Timberline HDZ | OC Duration |
|---|---|---|
| Wind Rating | 130 mph | 130 mph |
| Algae Protection | StainGuard Plus (25yr) | StreakGuard (10yr standard) |
| Nailing Tech | StrikeZone (40% wider) | SureNail (fabric strip) |
| Color Depth | Good (20+ colors) | TruDefinition (richest colors) |
| Cost (installed) | $3.50-$4.50/sq ft | $3.75-$4.75/sq ft |
| Availability | #1 brand (everywhere) | #2 brand (widely available) |
| Best Upgrade | Camelot II (designer) | Duration FLEX (impact-rated) |
GAF: The Market Leader
GAF Timberline HDZ is the single most installed shingle in America. There are good reasons for that dominance, and they matter for Savannah homeowners:
- • StainGuard Plus algae resistance (25 years) — this is GAF's biggest advantage over Owens Corning. In Savannah's humidity, algae streaking is a serious cosmetic issue. GAF's copper-infused granules provide the longest algae protection in the industry.
- • StrikeZone nailing area — 40% wider than standard, which means fewer installation errors. Shingles that are nailed correctly hold up better in wind.
- • Widest availability — every supply house stocks GAF. If you need a repair or replacement shingle in 10 years, you will find a match.
- • Most competitive pricing — because GAF has the highest volume, their pricing tends to be slightly lower than OC for equivalent products.
- • Largest contractor network — more GAF-certified installers means more competition, which is good for homeowners.
Owens Corning: The Premium Look
Owens Corning Duration is the shingle you choose when you want your roof to be a visual feature of your home, not just a functional covering:
- • TruDefinition color technology — OC produces the deepest, most dimensional-looking shingles on the market. The difference is visible from the street. If curb appeal matters (and it should — your roof is 40% of what people see), OC wins this category.
- • SureNail Technology — a woven fabric strip built into the nailing area. This is arguably the strongest nailing technology in the industry. In independent testing, SureNail shingles resist nail pull-through better than any competitor.
- • Duration FLEX upgrade — OC's SBS-modified line offers rubberized flexibility similar to Atlas StormMaster. If you want OC aesthetics with Atlas-level storm performance, this is the path.
- • Heavier shingle weight — OC Duration is noticeably heavier than GAF HDZ. More material generally means more durability and a more premium feel underfoot during installation.
The Savannah-Specific Decision
Choose GAF When:
- • Algae resistance is your top concern
- • Budget is a factor ($0.25-$0.50/sf savings)
- • You want easy future repairability
- • You prefer the most proven, widely-tested product
Choose Owens Corning When:
- • Curb appeal and aesthetics are priorities
- • You want the strongest nailing technology (SureNail)
- • You are considering the Duration FLEX impact-rated upgrade
- • You want a premium-weight, premium-feel shingle
Our Bottom Line
For most Savannah homes, we recommend GAF Timberline HDZ as the default choice — the 25-year algae warranty alone makes it the smarter pick in our humidity. But if you are building a custom home, renovating a historic property, or simply want the best-looking roof on the block, Owens Corning Duration delivers a noticeably more premium appearance.
We are certified installers for both GAF and Owens Corning. We will bring samples of each to your free estimate so you can compare colors, textures, and weights in person.
