2.4 common performance categories and corresponding span ratings performance category span rating 19/32 20 oc 23/32 24 oc I can get 4×8 panels of 23/32 t&g osb for ~$11 versus the $21 sturdifloor t&g osb.
Osb subflooring oriented strand board (osb) is similar to plywood but the structural differences are what set them apart.
Sturd i floor osb. Osb weight is usually a bit less than its plywood counterpart. For sanded plywood panels, see table 3. Bond classifications are exterior or exposure 1.
Exterior has a fully waterproof bond and is intended for permanent weather. Typical size is 4 ft x 8 ft, but other sizes may also be produced. Rated sheathing osb panels are for roofs and walls.
Oriented strand board, or osb, is a wood structural panel that can also be used for flooring. The values given in tables 1 and 2 represent the maximum allowable loads for plywood or osb. Commonly tongue and groove edges, but may be produced with square edge.
Blue ribbon ® osb for roofs and walls with a limited lifetime warranty. For tile flooring, this can cause bending and cracking, which is why it is discouraged. Is sturdifloor really worth spending twice the money on it?
However, osb is known for swelling around the edges when exposed to water. Black edge seal helps prevent moisture.