Georgia-Pacific Blue Ribbon Sturd-I-Floor Subfloor OSB Plywood Panels
Georgia Pacific Blue Ribbon OSB Sturd-I-Floor Plywood Subfloor Panels

Blue Ribbon® Sturd-I-Floor

  • Strong and uniform consistency throughout
  • Tongue and groove profile for easy installation
  • Smooth surface; no core voids, knots or splits
Stability, strength and moisture-protection – all rolled into one

Blue Ribbon® OSB Sturd-I-Floor panels contain no core voids, knots or splits and provide a quality base layer for subfloor applications. Ideal for use in residential and light commercial construction, with the span and sealing to keep moisture at bay, Blue Ribbon® OSB Sturd-I-Floor panels are also recognized for their ease of installation. If Georgia Pacific Wood Products can make your job easier, we’re all over it.

Blue edge seal helps prevent moisture intrusion

Effective fastener retention

Span and exposure rated sub-floor


Available Sizes*
Square Edge

3’-11 7/8” (1.216 m) x 7’-11 7/8” (2.435 m) – sized for 4’ x 8’

Square Edge

3’-11 7/8” (1.216 m) x 8’-11 7/8” (2.740 m) – sized for 4’ x 9’

Square Edge

3’-11 7/8” (1.216 m) x 9’-11 7/8” (3.044 m) – sized for 4’ x 10’

Tongue & Groove

3’-11 1/2” (1.206 m) x 7’-11 7/8” (2.435 m) – sized for 4’ x 8

Tongue & Groove

3’-11 1/2” (1.206 m) x 8’-11 7/8” (2.740 m) – sized for 4’ x 9’

Tongue & Groove

3’-11 1/2” (1.206 m) x 9’-11 7/8” (3.044 m) – sized for 4’ x 10’

  • Custom panels up to 26’ are also available
Building Code Performance Categories, Panel Thickness
7/16 CAT

0.418” (10.61 mm)

15/32 CAT

0.451” (11.45 mm)

1/2 CAT

0.483” (12.26 mm)

19/32 CAT

0.578” (14.68 mm)

23/32 CAT

0.703” (17.85 mm)

1-1/8 CAT

1.091” (27.71 mm)

Length/Width Tolerance

± 1/16” (± 1.6 mm)

Straightness Tolerance

± 1/16” (± 1.6 mm)

Squareness Tolerance

± 1/8” (± 3.2 mm)

Testing Agency

APA – The Engineered Wood Association


Exposure 1 : OSB suitable for uses not permanently exposed to the weather. Panels classified as Exposure 1 are intended to resist the effects of moisture on structural performance as may occur due to construction delays, or other conditions of similar severity.

Code Fire Classification

Class III or C

Flame Spread Rating

76-200, smoke developed index <450

Building Code Compliance

PS 2-10

SFI Certified


Safety Data Sheets

Product FAQs

What is Sturd-I-Floor®?

Sturd-I-Floor® is an APA designation that is a combination subfloor-underlayment produced from OSB or plywood. These panels feature a built-in underlayment that allows the convenience of using only Sturd-I-Floor® under certain finish flooring, especially carpet and pad.

What is the proper way to store OSB on the yard or on a job site?
Is there a difference between span ratings for OSB and plywood?
What is the flame spread classification for OSB?
What is the difference between Structural 1 and Exposure 1 panels?
Can you paint OSB?
Can OSB be used for outdoor projects?
What does the stamp on my OSB panel mean?
What does the "span rating" of an OSB panel mean?
How many sheets are in a unit of OSB?
Does GP's wood come from sustainably managed forests?
Do your panels meet formaldehyde emissions standards?
When used in the manufacture of crates and pallets, are Georgia-Pacific plywood and OSB safe for international shipping?

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