Can I Use 7/16 OSB for Roof Sheathing? In certain cases, but not always. The 7/16-inch OSB may be a safe, code-compliant option, but it depends on what space your rafter/truss is in, what your local code allows, what the stamped span rating of the OSB panel is, and what loads are anticipated to be applied.
When 7/16″ OSB is Commonly Used
Many modern houses have 7/16″ OSB used as roof sheathing above 16 in on-center framing, and it is often viewed as an inexpensive, non-specialty option on standard asphalt-shingle roofs. The guidance by manufacturers and trades displays 7/16″ panels sold and installed to the roof sheathing in residential usage under these circumstances.
Read more: How Long Do Wood Shingles Last?
When You Should NOT Use 7/16″ OSB
If you use a rafter or truss spacing of 24 on center, numerous code tables and construction guides require heavier sheathing, typically 5/8 or at least 1/2, based on the span rating of the panel used and the weight of the roof. Even a conflict between various IRC tables and local adoption is known, and so the stricter requirement is applicable, that 7/16″ not be below minimums in some jurisdictions. You should always consult the concerned IRC table and your local authorities where you have jurisdiction.
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How To Decide: A Quick Checklist
- Check the panel stamp:
OSB sheets carry an APA/PS2 span rating. Use that rating to confirm allowable spans for roof loads. If the stamp supports your rafter spacing and load, the panel is acceptable. - Match rafter/truss spacing:
16″ OC is the most forgiving; 24″ OC usually needs thicker sheathing or higher span ratings. - Consider roof load & covering:
Heavy roofing materials or high snow/wind zones push you toward thicker sheathing. - Follow code & AHJ direction:
Local code can be more restrictive than national tables; the AHJ’s interpretation is final.
Read more: How to Shingle a Hip Roof with 4 Dormers?
Handy Reference Table
| Rafter/Truss Spacing | Typical Guidance |
| 16″ OC | 7/16″ OSB commonly acceptable for standard shingles (verify panel stamp). |
| 24″ OC | Often requires 1/2″ or 5/8″ (or specific higher span rating), check code/AHJ. |
| Heavy loads/tile roofs | Use thicker sheathing (5/8″ or more) or structural panels rated for the load. |
Final Advice
If you’re asking, “Can I use 7/16 OSB for roof sheathing?”, it is always best to begin with the stamp on the OSB panel, your rafter spacing, and any local code/AHJ requirements. Where doubtful, use a thicker panel (1/2 or 5/8) to add additional stiffness and life, particularly where there exists high snow, high wind, and tile roof conditions.
Second opinion or physical inspection required? At ONLY Roofing, we check sheathing options, confirm span ratings, and suggest the safest and most economical one to use on your roof. Go to our site or contact us to have us go over your plans!
