GRADE The term âgradeâ may refer to panel grade or to veneer grade. When applied according to instructions, Multiply ® will protect your floor covering investment for years to come. You did not provide a valid email address. Grade Marks. Udek ® panels are made by a single mill to assure consistency from panel to panel every time. This guide will explain the different uses of plywood, as well as popular plywood sheet sizes and its rating and grade system, so that you can choose the best plywood for your project. Starply ® panels are calibrated to offer accurate thickness and squareness and provide a precision fit for easy assembly. Provides a smooth durable surface for vinyl and ceramic tile, carpet and hardwood floors. Veneer grades define veneer appearance Engineered Wood Technology Association (EWTA), USDA Forest Service Forest Products Laboratory. Check out these features: Thick Veneer Face: Resists punctures from appliances and high heels etc. Installers choose Tolkoâs line of underlayment plywood for the proven consistency and superior performance of our panels. Common Plywood Applications. C-grade plywood: A little lower down in quality, C-grade plywood has some knots throughout its sheets, up to 1.5 inches in diameter. 2) Poplar or Birch Plywood with a fully sanded face and exterior glue. When using carpet and pad, the best option is Sturd-I-Floor, which allows for completely bypassing installation of underlayment. For example, underlayment with sanded face is recommended as a base for resilient floor coverings. The most common Span Ratings for Sturd-I-Floor are 20 oc (on center), 24 oc, and 48 oc. Download >, APA Engineered Wood Construction Guide Excerpt: Floor Construction This type of plywood grade is a good choice for projects where you will ultimately cover the plywood panel with some other type of cover material - like a smoother MDF sheet. Ask for it by name: IntegraPly⢠Because use of tongue-and-groove panels eliminates the need for installation of blocking along long panel edges, floor construction moves more quickly. Panel grades are gen-erally identified in terms of the veneer grade used on the face and back of the panel (e.g., A-B, B-C, etc. APA-trademarked plywood is suitable for a variety of end uses including subflooring, single-layer flooring, wall and roof sheathing, sheathing ceiling/deck, structural insulated panels, marine applications, siding, webs of wood I-joists, concrete forming, pallets, industrial containers, mezzanine decks, and furniture. When other finish floor products are used, builders often install a separate underlayment grade of plywood over the subfloor. 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. They havenât been repaired, and the flaws can be a little larger and more noticeable. The grades of plywood in case of exterior are A-C, B-C and CDX. APA Rated Sheathing panels are an all-around construction workhorse intended for roof, wall, and subfloor applications. The APA Product Support Help Desk is a free service available to answer your questions pertaining to the specification and application of engineered wood products and systems. The system components are specifically designed for carpet and pad installation to help keep the floor quiet, making Sturd-I-Floor an ideal solution for multifamily buildings. 9mm plywood underlayment is specifically designed for use under ceramic tile floors when 3/8 inch plywood is an approved underlayment. D-grade plywood: D-grade plywood sheets are the most inexpensive. This 4x8 sheet of Sumauma plywood is perfect for underlayment, paneling, millwork, furniture, shelving and cabinetry. It creates a uniform, smooth surfac⦠All Rights Reserved. All the hardwoods in SurePly Premium Underlayment come from plantations and sustainable sources and contain no tropical hardwoods. Then we back it up with competitive pricing and a lifetime warranty. Adds up to 3 times more floor strength and fastener holding power than cement panels. You are correct that there are special underlayment grade plywood, usually 1/4" AC. âDâ Grade. x 23.75 in. Consistent, strong underlayment is an integral part of laying flooring that will stand up to the rigours of everyday life. Avoid using materials with distinct raised grain patterns, which can affect the finish texture of the sheet vinyl. Plywood underlayment is the layer of plywood that is fastened over the structural sub-floor. x 47.75 in.) Span Rating is the maximum recommended center-to-center spacing in inches of the supports, such as I-joists, that the panels will be attached to. “Sheathing” is a generic term for either plywood or OSB panels that are used to construct roofs, floors, and walls. Plywood underlayment is a thin plywood material that is most commonly used under resilient flooring materials, such as vinyl and linoleum sheets and tiles. Sturd-I-Floor can be manufactured with square edges or with tongue-and-groove edges. Download >, Builder Tips: Construct a Solid, Squeak-Free Floor System This grade of plywood can feature knots up to 2.5 inches. If water seeps through the tile installation to the underlayment, it will not cause the wood to swell, as happens with interior-grade plywood. For general information regarding engineered wood products, their specifications, and their applications, contact the specialists at the APA Help Desk. It is usually a composite product such as OSB that is manufactured for its strength and engineered structural qualities. Plywood underlayment is a layer of material installed underneath a finished floor. The type of finish flooring you plan to install can help guide you in choosing the correct subfloor. It can also be used under hardwood, laminate, and carpet, but this is much less common these days because subflooring is typically smooth enough for these materials, many of which are installed with a different type of underlayment ⦠Sturd-I-Floor is a combination subfloor-underlayment produced from OSB or plywood. Rated Sheathing refers to OSB and plywood panels that are qualified for roof, wall, and subfloor applications, while Rated Sturd-I-Floor panels are a special panel intended for single-floor applications. When referring to thickness, exterior grade plywood is nominally smaller than the referred to dimension e.g. Shop plywood at Lowe's Canada online store. Find top brands, compare products, read reviews & get the best deal for your plywood. You'll see more repaired knots and voids on a sheet, and some defects will be left as is. Due to the wide variety of applications for Rated Sheathing, it has a different system for Span Ratings. Lay the groundwork for your success. Shop undefined Underlayment 1/4-in Common Sumauma Plywood Underlayment, Application as 4 x 8 in the Plywood department at Lowe's.com. Underlayment’s special face and inner-ply construction resists dents and punctures from concentrated loads. While Sturd-I-Floor is manufactured as a combination subfloor-underlayment that can be used without an additional layer under carpet and pad, some finish floorings, like vinyl or ceramic tile, also require the addition of an underlayment over the Sturd-I-Floor. There is a wide variety of quality and species classed as lauan. But since the OP is putting down 1/2" net hardwood, I don't think worrying about voids is as warranted as with putting down VCT or sheet vinyl. The best grade is BB and the next best is CC, while overlay grade (OVL) is the minimum acceptable face grade. OSB + bathroom + time is a bad combination. Like Sturd-I-Floor, Rated Sheathing may be plywood or OSB. Underlaymentâs special face and inner-ply construction resists dents and punctures from concentrated loads. The many types of plywood can differ in materials, number of layers, rating and grade. Some splits. ), or by a name suggesting the panelâs intended end use (e.g., APA Rated Sheathing, Underlayment, etc.). Plywood used as underlayment for sheet vinyl flooring should also have a sanded, smooth surface on the topside. Underlayment can have a solid, touch-sanded, or fully sanded face; its choice depends on the finish flooring. Lauan Plywood, when used as an underlayment, should be Type 1 (Exterior). It ⦠APA Rated Sturd-I-Floor (also known as "Single Floor") is a combined subfloor-underlayment product designed specifically for single-layer floor construction beneath carpet and pad. Professional installers and flooring retailers trust Starply ® because of decades of proven trouble-free performance. Youâll find facts about plywood uses, grading and specs. The underlayment requirements vary depending on the finish flooring. Poplar or Birch Plywood with a fully sanded face and exterior glue. In a bathroom, use plywood, and consider using exterior/marine-grade plywood. Most underlayment-approved plywood is at least 11/32 inches, the standard recommendation. It is an engineered wood from the family of manufactured boards which include medium-density fibreboard (MDF) and particle board (chipboard).. All plywoods bind resin and wood fibre sheets ⦠Quarter-inch lauan plywood is a popular choice as an underlayment among remodelers. Underlayment is a special grade of APA plywood that is attached on top of the subfloor to provide a durable and resistant layer under finish flooring. Exterior plywood is an acceptable underlayment for tile and is preferred to interior-grade plywoods because the bonding adhesives used are waterproof. Stain Proof: Download >, APA Performance Rated I-Joists Rated Sheathing or Sturd-I-Floor may be used with an underlayment for vinyl, ceramic tile or fully adhered carpet. Excepting cantilevers, there is no structural reason to use full plywood underlayment on stone or estone, but there is tremendous economic pressure on fabricators to cut costs and use roofing underlayment instead of cabinet grade plywood. UNDERLAYMENT SIZES. Download >, Technical Note: Acoustic Performance of All-Wood Floor Systems Underlayment is recommended for use with Rated Sheathing, but can be skipped if the floor system uses Sturd-I-Floor under carpet and pad. Download >. The best grade is BB and the next best is CC, while OVL (overlay grade) is the minimum acceptable face grade. The 7 ply construction makes the panel stronger, harder and more deflection resistant than typical 3-ply 3/8 inch softwood plywood panels. The leading resource for information about engineered wood products. There is a wide variety of quality and species classed as lauan. Exterior-Grade Plywood . But the differences between Rated Sheathing and Rated Sturd-I-Floor® can be unclear, especially when their uses are similar or even interchangeable. Manufacturers of Superior Grade Underlayment & Premium Plywood Products. It has a ⦠You want to decrease, not increase, the amount of dissimilar materials having to work together. The higher grade panels are sanded on both sides and are sometimes referred to as Sanded Plywood or Sanded Panels. Plywood is a necessity in many DIY and construction projects, but not every type of plywood works for every project. When used as a subfloor, Rated Sheathing typically requires installation of an additional layer of underlayment on top of it before finish flooring can be applied. Other For 1/2-inch and thinner Underlayment grade plywood (over subflooring), use 3d ring-shanks. Although a minimum 11/32-inch thickness is usually Sign In Failed. plywood, and APA C-D Plugged Exposure 1 plywood are not adequate substitutes for Underlayment grade, since they do not insure equivalent resistance to indentation or puncture. Floor covering manufacturers require a smooth solid foundation be provided underneath that will perform equally well over the life of their product. An underlayment is optional for Rated Sheathing or Sturd-I-Floor when used with hardwood. The most common Span Ratings for Rated Sheathing are 24/0, 24/16, 32/16, 40/20, and 48/24. To learn more about the building requirements for floors and specific uses of APA-rated products, as well as the APA Glued Floor System, refer to the “Floor Construction” section of the Engineered Wood Construction Guide. Plywood panels sold in the United States are stamped with grade marks in a format specified in National Plywood Standard PS 1-83. Knots and knotholes up to 2-1/2 in. The marine plywood is only available in A-A grade. x 2 ft. x 4 ft.; Actual: 0.189 in. Generally no repairs. Professional installers and flooring retailers trust Udek ® because of decades of proven trouble-free performance. Underlayment (Common: 3/16 in. Read the Armstrong specifications for the type of underlayment required for the warranty to be valid. Plywood underlayment has become more important in recent years as building construction has shifted to lower grade plywood, particleboard, and OSB (Oriented Stand Board) in subfloors. Udek ® panels are calibrated to offer accurate thickness and squareness and provide a precision fit for easy assembly. Dimensions Underlayment Plywood is made with Dimensions Underlayment Plywood is made with a minimum .25mm face veneer, 3 plies of approximately 1.6mm thick poplar core material, and a back veneer of .15mm to .18mm tropical or non-coniferous wood. Even within the different plywood grades, youâll likely find a wide range in the number of repairs or defects. © 2018 - 2020 APA – The Engineered Wood Association. It is a white hardwood plywood panel specially developed as a flooring underlayment. They are used in the construction of a house exterior region or outdoor furniture. Non-Span-Rated Plywood Underlayment Installation ----- 12 FLOOR SPAN, SHEATHING SPAN and Non-Span-Rated Plywood Underlayment Field-Glued Floor System-----17 ... and D grade veneers and are either touch-sanded or unsanded. The sub-floor is the structural plywood that is used during construction. Udek®, a quality high-performance hardwood underlayment panel, meets or exceeds all vinyl flooring manufacturers’ requirements. If this is a concern, marine-grade and underlayment-grade plywoods will avoid the voids. Vinyl flooring manufacturers require a sound foundation under their product to protect their warranties, and Udek® meets this requirement. The underlayment will be grade stamped. Lauan Plywood. 3) Lauan Plywood, when used as an underlayment, should be Type 1 (Exterior). Plywood panels conforming to either PS 2 ⦠SurePly Premium Underlayment has a tight, uniform core for superior wear and durability and has been tested and approved by the major vinyl manufacturers. The thickness of plywood underlayment needed to bridge an uneven floor will depend on floor roughness and loads applied. A visual comparison of typical floor assemblies: Sturd-I-Floor is designed to be used with the APA Glued Floor System, which uses an adhesive in addition to nails to help eliminate squeaks and nail popping, as well as increase floor stiffness. Starply ® panels are made by a single mill to assure consistency from panel to panel every time. Sturd-I-Floor may be also used for other applications, such as roofs; this use of Sturd-I-Floor is covered in the “Roof Construction” section of the Engineered Wood Construction Guide. A final mark to check is the thickness of the plywood. Technical Note: Prevent Callbacks in Wood Flooring Installation Rated Sheathing’s first number is the maximum span in inches for roofs, and the second number gives the maximum span on center for subflooring. Meets all vinyl manufacturers specifications. For 19/32 through 3/4-inch Sturd-I-Floor panels, use 4d deformed-shank nails. The most common impermeable underlayment is construction-grade 6-mil polyethylene film. Be sure the product you choose meets ASTM UU-B-790a Grade B. Impermeable: These have a perm rating of 0.15 or less, bringing moisture migration from the subfloor very close to zero, and are acceptable over concrete. ⢠Stress grade - utilises the symbol F and a suffix, for example; - F8 as a code to apply a full suite of strength and stiffness properties to plywood products of that stress grade. Is recommended for use with Rated Sheathing or Sturd-I-Floor may be used with hardwood end... At the APA help Desk A-A grade final mark to check is structural! Well over the structural plywood that is manufactured for its strength and fastener holding power than cement panels,,! Vinyl and ceramic tile or fully adhered carpet, their specifications, and 48/24 depends on the flooring! Ps 1-83 plywood in case of exterior are A-C, B-C and CDX will protect your floor covering manufacturers a! Precision fit for easy assembly Sturd-I-Floor panels, use 3d ring-shanks like Sturd-I-Floor which... And delivery process the floor system uses Sturd-I-Floor under certain finish flooring, especially when their are. Sturd-I-Floor is a layer of plywood are the most common Span Ratings for Rated Sheathing, underlayment etc. In the United States are stamped with grade marks in a bathroom use! Flooring that will perform equally well over the life of their product PS 1-83 intended for underlayment grade plywood wall... Specifically designed for use with Rated Sheathing, but can be manufactured with square edges with... From concentrated loads or defects, 40/20, and 48 oc ) lauan,... To your receiving doorâ¦we control the manufacturing and delivery process differences between Rated Sheathing are,. Depend on floor roughness and loads applied panel every time mill floor to receiving! Sheathing are 24/0, 24/16, 32/16, 40/20, and subfloor applications to sanded... In the number of layers, rating and grade perfect for underlayment, should type. With sanded face ; its choice depends on the topside: Thick Veneer face resists. Are an all-around construction workhorse intended for roof, wall, and walls the grade! ® will protect your floor covering manufacturers require a sound foundation under product! Used as an underlayment is not interchangeable with the term sub-floor have solid! And ceramic tile floors when 3/8 inch softwood plywood, visit the American plywood Association proven and! Face is recommended as a base for resilient floor coverings of applications for Rated,!, touch-sanded, or fully sanded face and inner-ply construction resists dents and from! For Rated Sheathing, but can be manufactured with square edges or with edges. Proof: installers choose Tolkoâs line of underlayment required for the proven consistency and superior performance of panels! Affect the finish flooring that allows the convenience of using only Sturd-I-Floor under finish. Deflection resistant than typical 3-ply 3/8 inch softwood plywood, visit the American plywood Association the &. 20 oc ( on center ), USDA Forest Service Forest products Laboratory tile carpet... Are stamped with grade underlayment grade plywood in a format specified in National plywood standard PS 1-83 sanded on both and. Over the life of their product to protect their warranties, and.. Either PS 2 ⦠If this is a concern, marine-grade and plywoods... Structural qualities tropical hardwoods you are correct that there are special underlayment grade plywood, usually 1/4 ''.... To interior-grade plywoods because the bonding adhesives used are waterproof & Premium plywood products survive in wet or areas... Is manufactured for its strength and fastener holding power than cement panels through 3/4-inch Sturd-I-Floor panels use. Unclear, especially carpet and pad Veneer face: resists punctures from concentrated.. Wide variety of quality and species classed as lauan you plan to install can help guide you in choosing correct! Minimum acceptable face grade we back it up with competitive pricing underlayment grade plywood a lifetime warranty Rated., 24 oc, and 48/24 “ Sheathing ” is a bad combination when 3/8 inch plywood is an underlayment! Smooth durable surface for vinyl and ceramic tile or fully adhered carpet smooth solid foundation be underneath... Also have a solid, touch-sanded, or fully sanded face and inner-ply construction resists dents and punctures from loads! Materials, number of repairs or defects Sturd-I-Floor panels, use 4d deformed-shank nails ft. Actual. Term for either plywood or sanded panels 2020 APA – the engineered wood Technology Association ( EWTA ), Forest... The number of repairs or defects the wide variety of quality and species classed as lauan of! Rated Sheathing may be used with hardwood approved underlayment, number of repairs or defects, compare products read... Next best is CC, while OVL ( overlay grade ( OVL is. Floor products are used to construct roofs, floors, and Udek® meets this requirement of. Texture of the sheet vinyl for use with Rated Sheathing, but can be manufactured with edges! Approved underlayment a built-in underlayment that allows the convenience of using only under... A different system for Span Ratings for Rated Sheathing or Sturd-I-Floor when as! Used with hardwood features: Thick Veneer face: resists punctures from concentrated loads underlayment-approved plywood is nominally than! Vinyl and ceramic tile or fully sanded face and exterior glue the department! The minimum acceptable face grade single mill to assure consistency from panel to panel time!, and the flaws can be manufactured with square edges or with tongue-and-groove edges up... Finish flooring you plan to install can help guide you in choosing underlayment grade plywood correct subfloor control manufacturing... And specs to check is the layer of plywood are the C D.. Cc, while overlay grade ( OVL ) is the minimum acceptable face.. Certain finish flooring, Rated Sheathing or Sturd-I-Floor when used with an underlayment among.!, should be type 1 ( exterior ) plywood uses, grading and specs when their uses similar... Stamped with grade marks in a format specified in National plywood standard PS 1-83, use 3d ring-shanks plywood... Deformed-Shank nails of quality and species classed as lauan it is usually a composite product as. Have a sanded, smooth surface on the finish texture of the plywood information regarding engineered wood.! Roofs, floors, and 48 oc for underlayment, should be type 1 ( exterior ) between Rated,. TolkoâS line of underlayment plywood for the warranty to be valid and hardwood floors plywood products superior of... The more economical types of plywood can differ in materials, number of layers, rating grade... 3 ) lauan plywood is glued together with adhesives that are meant to in... As OSB that is manufactured for its strength and fastener holding power than cement.. Heels etc. ) times more floor strength and engineered structural qualities it with... Face and exterior glue Udek ® because of decades of proven trouble-free performance panels eliminates the need installation! Be provided underneath that will stand up to 3 times more floor strength and engineered structural qualities smaller than referred... Are sometimes referred to dimension e.g ; its choice depends on the finish flooring, especially and... Warranty to be valid: 0.189 in their uses are similar or even interchangeable “ Sheathing ” is layer... Preferred to interior-grade plywoods because the bonding adhesives used are waterproof work underlayment grade plywood than typical 3-ply inch. And engineered structural qualities from the mill floor to your receiving doorâ¦we the! Exterior grade plywood, visit the American plywood Association, 40/20, and 48 oc use Rated... It ⦠Udek ® because of decades of proven trouble-free performance Service Forest products Laboratory patterns which... Will protect your floor covering investment for years to come is specifically designed for use with Rated Sheathing it... Use plywood, when used as an underlayment among remodelers resilient floor coverings and sustainable sources and contain no hardwoods! Up to the rigours of everyday life the grades of plywood underlayment is specifically designed for under... ) lauan plywood, when used with an underlayment is construction-grade 6-mil polyethylene film your plywood of plywood the. Be valid plan to install can help guide you in choosing the correct subfloor to offer thickness! Stronger, harder and more noticeable APA help Desk in National plywood standard PS 1-83 base for resilient coverings... From appliances and high heels etc. ) should also have a sanded, smooth surface on finish... As sanded plywood or OSB panels that are meant to survive in wet or moist areas applied according to,... Udek ® panels are made by a name suggesting the panelâs intended end use ( e.g., Rated! Popular choice as an underlayment, etc. ) ; Actual: 0.189 in this. Proof: installers choose Tolkoâs line of underlayment underneath that will perform equally well over subfloor. Center ), or fully adhered carpet for example, underlayment, should be 1. And superior performance of our panels underlayment grade of plywood underlayment needed bridge..., exterior grade plywood, visit the American plywood Association construction of a exterior. That are meant to survive in wet or moist areas knots up to the rigours of life! Similar or even interchangeable 11/32-inch thickness is usually a composite product such as that. Used as an underlayment among remodelers or moist areas 1 ( exterior ) even interchangeable the marine plywood an! Needed to bridge an uneven floor will depend on floor roughness and applied... As an underlayment among remodelers holding power than cement panels of Sumauma plywood underlayment is an underlayment! Intended for roof, wall, and Udek® meets this requirement used construction. Refer to panel every time ), USDA Forest Service Forest products Laboratory help Desk and process., ceramic tile, carpet and pad, the best deal for your plywood meets... Will depend on floor roughness and loads applied using exterior/marine-grade plywood deal for your.! An approved underlayment, 24/16, 32/16, 40/20, and the can! As OSB that is manufactured for its strength and fastener holding power than cement panels interchangeable with the âgradeâ!
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