Buzzline Deep Dive
The Decking Dilemma: Is 3/8" Plywood Enough?
We’re often asked about different roofing materials. One question we encounter a lot is this: Is 3/8″ plywood a viable roofing solution?
It might pass code, but that doesn’t mean it’s a good idea. After replacing thousands of roofs, we’ve seen the same pattern: 3/8″ plywood doesn’t hold up. It’s too thin, softens over time, and often needs to be replaced prematurely—especially on second-time roof jobs.
Why We Don’t Recommend 3/8" Plywood
- Prone to delamination: Layers separate over time, especially after moisture exposure.
- Insufficient nail hold: Shingles can loosen more easily due to weaker fastener retention.
- Not load-rated for reroofing: Doesn’t reliably support worker weight or heavier modern roofing materials.
- Fails under stress: More likely to sag or flex, especially between rafters.
- No margin for error: Leaves little buffer for moisture, foot traffic, or minor framing issues.
The Industry Standard: Roofing professionals across the industry widely agree—3/8″ sheathing may be technically allowed, but thicker materials like 1/2″ plywood or 7/16″ OSB are the standard for durability, safety, and proper long-term performance.
Our Recommendation for Peace of Mind
Our standard is simple: We recommend upgrading to 1/2″ CDX plywood or 7/16″ OSB. This provides the strength, safety, and long-term durability your home deserves.
Buzzline Owner POV: The Magic is in the Details
At Buzzline Roofing, we believe that what’s under the shingles is just as important as the shingles themselves. Cutting corners on decking might save a few dollars today, but it often leads to costly repairs tomorrow. We build for the long haul, starting with a solid foundation.
Ready for a Solid Roof?
Don’t settle for "good enough." Get a roof that’s built to last with Buzzline Roofing.
| Material | Our Recommendation |
|---|---|
| Standard Decking | 1/2" CDX Plywood or 7/16" OSB |
| Warranty Support | Ensures maximum shingle fastener retention |
| Safety | Provides reliable support for foot traffic |
