The manufacturer, distributor, builder or installer? Structurally, OSB and plywood are very similar in strength and ability to hold nails or screws; OSB may have greater shear strength -- the ability to span distances -- than comparable thickness of plywood. Tile over wood subfloor. plywood and OSB are the two most common materials used for floor decking, and typically they are 5/8″ or 3/4″ thick. Although 23/32" OSB is span-rated for floor joist systems spaced at 24" on-center, NWFA believes a thicker subfloor is necessary to reduce deflection of the subfloor and minimize pops and squeaks in the wood flooring. AdvanTech subfloor adhesive starts as a foam and settles into a high-strength gel adhesive. Column 1. For joist spans 16 inches or less, NWFA recommends minimum panel thickness of 5⁄8-inch plywood or 23⁄32-inch OSB; the building code requires 5⁄8-inch plywood or OSB. Column 3. No slip surface: Manufactured with a continuous press, this subfloor does not need to be sanded to meet thickness tolerances. For 19/32-inch-thick panels, the joists should be 20 inches on center. An OSB sheet has a finely corrugated, unfinished side and a smooth side that is often coated with a clear finish. Check with suppliers to determine availability. NWFA Recommendations Minimum thickness should be 5/8” for plywood and 23/32” for OSB. Plywood, or even OSB, has its strength running with its length. Very few! Plywood shed flooring is usually 3/4 inch and OSB 5/8 inch thick. When NWFA Guidelines minimums are not met, the recommendations are to overlay the existing subfloor material with a 1⁄2-inch panel product or add structural support from below. DryGuard® enhanced OSB Sturd-I-Floor® is a multi-layered, moisture resistant sub-floor with built-in protection from thickness and edge swell. Miller has more than 21 years of experience in the hardwood flooring industry, most recently having worked as a regional manager at Basic Coatings. Plywood is often sold in 1 / 4 “, 1 / 2 “, or 3 / 4 ” nominal thicknesses, but the actual thickness is often 1 / 32 ” thinner. When OSB goes beyond flooring use and into wall and roof sheathing, the profit margin will increase. Meanwhile, OSB compacts as many as 50 layers of strands into a single sheet the same thickness as that plywood, ensuring a much denser—and heavier—product throughout. 5. Even then, it could only be used for outbuildings or workshops. Shop AdvanTech 1-1/8-in x 4-ft x 8-ft Tongue and Groove OSB Subfloor in the OSB department at Lowe's.com. As long as you are getting thick high-quality plywood or even OSB (anything except MDF / particle board) your home should be fine. 1220 mm (4) 1829 mm (3) 2400 mm (1) 2440 mm (3) Depth. 9 mm (3) 11 mm (3) 18 mm (5) Width. For joist spans 16 inches or less, NWFA recommends minimum panel thickness of 5⁄8-inch plywood or 23⁄32-inch OSB; the building code requires 5⁄8-inch plywood or OSB. For decades, 23/32″-thick OSB has been the most commonly used thickness of OSB subflooring. This issue's tip is from Daniel Caffo at Daniel Caffo Hardwood Flooring Inc. in Woodlyn, Pa.We... One of the world's oldest cities has a new wood flooring trend. National Wood Flooring Association approves usage of OSB as a subfloor for hardwood flooring with nail-down installation with minimum thickness of 23/32″ and recommended thickness of 7/8″ or 1-1/8″. Most subfloor-grade plywood uses similar glues between the laminators. Very few! In this scenario, Jim and Rich install 1/2″ cementious backer unit (CBU) resulting in at least an 1-1/8″ thick subfloor. Not all thickness are readily available. If you are a homeowner building your workshop or laying own your subfloor in your house, consider purchasing 5/8" CDX plywood. Plywood vs. OSB Subfloor Comparison Guide. When NWFA Guidelines minimums are not met, the recommendations are to overlay the existing subfloor material with a 1⁄2-inch panel product or add structural support from below. Are there any better options available? It is not uncommon to see a properly installed floor still exhibit these issues. Plywood shed flooring is usually 3/4 inch and OSB 5/8 inch thick. OSB is often used for sheathing in floors and walls, and in some regions, it is the building material of choice. A beautiful floor starts with a stable subfloor. The bare minimum recommended by most tile setters is a total subfloor thickness of 1-1/8 inch. No slip surface: Manufactured with a continuous press, this subfloor does not need to be sanded to meet thickness tolerances. Here's what some of them said: Structurally, OSB and plywood are very similar in strength and ability to hold nails or screws; OSB may have greater shear strength -- the ability to span distances -- than comparable thickness … Minimum Thickness, mm. The bare minimum recommended by most tile setters is a total subfloor thickness of 1-1/8 inch. How to Hire Hardwood Installers and What to Expect. For joists spaced more than 19.2 inches on center, the minimum thickness for plywood is 7/8 inch and for OSB, 1 inch. Most prefer a minimum thickness of at least 1-1/4 inch, such a … OSB has the appearance of giant cornflakes pressed together to form structural panels in sizes similar to plywood, such as 4' x 8' x 5/8". the subfloors need to be thicker. OSB tends to be less expensive than plywood, so builders and contractors can squeeze a bit more profit out of the project. There are several factors that determine what subfloor thickness … Using green joists. Lee has over two decades of hands-on experience remodeling, fixing, and improving homes, and has been providing home improvement advice for over 12 years. In this scenario, Jim and Rich install 1/2″ cementious backer unit (CBU) resulting in at least an 1-1/8″ thick subfloor. An OSB subfloor is a subfloor made from oriented strand board (OSB), a manufactured wood product. If you’re cutting with a circular saw, set the saw depth to equal the thickness of the OSB subfloor—for example, 0.75 in (1.9 cm). Item. OSB panels are available in a variety of common thicknesses and sizes as shown in Table 1, below. Let’s take a look at what 3/4 inch pressure-treated CDX plywood is and why you want it. C. Both CD EXPOSURE 1 plywood and OSB Exposure 1 subfloor panels are appropriate subflooring materials, but the proper thickness of the material will be determined by the factors noted below in Part IV – Panel Products Subflooring, E - Acceptable Panel Subfloors. Minimum Thickness, mm.