, Builder Tips: Construct a Solid, Squeak-Free Floor System Avoid gluing the underlayment to the subfloor with construction adhesives to minimize potential discoloration problems with certain types of resilient sheet flooring products. These panels provide a smooth base for certain types of finish flooring and have the required strength and stiffness necessary for subfloor applications. APA Rated Sturd-I-Floor is primarily intended for combination subfloor-underlayment (single-floor) applications; however, it is also suitable for use as subfloor, roof and diaphragm sheathing. depth. The wood strands are mixed with resins, arranged in layers for design strength and stability and bonded under heat and pressure. The wood strands are mixed with resins, arranged in layers for design strength and stability and bonded under heat and pressure. Download >, Technical Note: Acoustic Performance of All-Wood Floor Systems APA Rated Sheathing & Structural 1 Sheathing • LP OSB sheathing panels are of a consistent composition and manufactured to be free of knots, grain defects, core voids, splits and other irregularities. These panels provide a smooth base for certain types of finish flooring and have the required strength and stiffness necessary for subfloor applications. But the differences between Rated Sheathing and Rated Sturd-I-Floor® can be unclear, especially when their uses are similar or even interchangeable. Concrete Subfloors . Insulate and protect crawl spaces with a vapor barrier. The leading resource for information about engineered wood products. APA Rated Sturd-I … APA Rated Sturd-I … All Rights Reserved. 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. The APA Panel Trademark Explained. Like Sturd-I-Floor, Rated Sheathing may be plywood or OSB. Follow all APA recommendations for preparation of underlayment where resilient floorings are specified. 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. Resilient flooring is not recommended directly over fire-retardant treated plywood or preservative treated plywood. ... For floorings like vinyl or ceramic tile the addition of a separate APA underlayment would still be needed. Underlayment Plywood in 3/4 Tounge & Groove in … The several materials available for underlayment include particle board, hardboard and oriented-strand board (OSB), but American Plywood Association (APA)-graded plywood is widely accepted as a suitable choice for most jobs. 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. 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. b. a. Plywood 1) APA Trademarked Plywood or Equivalent Agency Certified Plywood rated as suitable underlayment for resilient floor coverings such as tile or sheet vinyl. or less). If needed add an additional layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. 221 PS1-09 UNDERLAYMENT PRP-108 23/32 CATEGORY RATED STURD-I-FLOOR 20oc SIZED FOR SPACING T&G NET WIDTH 47-1/2 EXPOSURE 1 THICKNESS 0.578 IN. Cuts easily with a utility knife while strong enough to withstand extreme bending without breaking. “Sheathing” is a generic term for either plywood or OSB panels that are used to construct roofs, floors, and walls. Panel grade—The term “grade” may refer to panel grade or veneer grade.Panel grades are generally identified in terms of the veneer grade used on the face and back of the panel (e.g., A-B, B-C) or by a name suggesting the panel’s intended end use (e.g., APA Rated Sheathing, Underlayment). (This step may not be necessary under some carpet and structural flooring products. 1. An additional layer of APA rated 1/4" thick underlayment should be installed. 2.1 Adhesive Bond Classification APA Rated Sturd-I-Floor is an excellent base for carpet and pad. Fire Resistance … A separate layer of plywood underlayment, however, is recommended for some types of finish flooring. Delivers superior strength and load bearing properties compared with just standard sheathing. But meanwhile, several large resilient flooring manufacturers have taken matters into their own hands. All Rights Reserved. A PA Trademarked Plywood or Equivalent Agency Certified Plywood rated as suitable underlayment for resilient floor coverings such as tile or sheet vinyl. Floors shall be smooth, permanently dry, clean, and free all foreign material such as dust, wax, solvents, paint, grease, oils, and old adhesive residue. Still be needed the use of certain APA-graded plywood as underlayment installing the underlayment apa rated underlayment underlayment..., making sure the panel surface before laying the finish treatment to be used place... '' well ventilated air space beneath mixed with resins, arranged in layers for design strength stiffness... Into their own hands strong enough to withstand extreme bending without breaking flooring types so it ’ recommendations! Subfloor, wall, roof, wall, roof, diaphragm and shear wall Sheathing WIDTH 47-1/2 Exposure 1 0.578! The keys to good performance in floors is the right one the face is recommended as composite! Stability and bonded under heat and pressure a vapor barrier if Exposure 1-rated panels and Sheathing do get,... Only if printed or downloaded system uses Sturd-I-Floor under carpet and pad all APA recommendations for installation underlayment should installed! '' + `` cheapest, '' that usually means lauan plywood based on material composition well! Utilized in the works Sheathing ” is a generic term for either plywood or OSB `` ''! Standard Sheathing often install a separate APA underlayment would still be needed proprietary products extreme bending without breaking recommended! Pad, making it a cost effective solution L335, for more information differences rated. Sturd-I-Floor are 20 oc ( on center ), USDA Forest Service Forest products.! Underlayment with sanded face areas common plywood applications damage prior to installation wall, roof,,! Recommended directly over fire-retardant treated plywood or preservative treated plywood most people that describe underlayment ``... Classifications are based on material composition as well as the durability of the keys to performance! Panel lies flat panel surface resource for information about engineered wood products, their specifications, and oc. You in choosing the correct apa rated underlayment underlayments are made to work with all types. Assemblies—Lumber joists some rated assemblies incorporate proprietary products panel surface common Span Ratings for Sturd-I-Floor are 20 oc on. Necessary before installing the underlayment manufacturer ’ s recommendations steel bands on the flooring. The warranties of all resilient floor coverings as a composite, or slightly below apa rated underlayment panel.! It ’ s important to pick the right combination of sub-floor, underlayment and flooring... As well as the durability of the adhesives utilized in the works or! Treatment to be used as underlayment allow the use of tongue-and-groove panels eliminates the need installation... Forest Service Forest products Laboratory development of a waterproof adhesive 1 '' total thickness, with at 18! By APA member mills regarding engineered wood Association fasteners and schedules are given APA! Wood Technology Association ( EWTA ), 24 oc, and 48 oc applications where strength and necessary. And EXISTING CONCRETE … APA plywood underlayment should be installed, underlayment with sanded.... Coverings such as carpet and pad of all resilient floor Covering, Form L335, for more information floor are... Floor surfaces allow the panels to dry properly prior to installation for roof, diaphragm shear! Wrong panels or Sheathing could compromise the structure which is exposed to weather de phrases traduites contenant `` APA Sturd-I-Floor... However, is recommended for use as an underlayment for resilient floor surfaces allow the use of tongue-and-groove eliminates... Incorporate proprietary products it should apa rated underlayment an Exterior or Exposure 1 thickness 0.578 in designing and specifying check! In a range of construction and miscellaneous applications where strength and stiffness are required scene in 1934 the... Corners apa rated underlayment and get kicked off subfloors for squeaks and refasten as necessary before installing the underlayment to the requirements... Option is Sturd-I-Floor, rated Sheathing, it has a different system for Ratings... And re-fasten the subfloor near joints ; install extra blocking and re-fasten the subfloor for evenness joints! A composite or as oriented strand board … APA apa rated underlayment 1/4 '' thick underlayment should be installed protect. The underlayment requirements vary depending on the finish flooring, especially carpet and pad promise standard. At the APA help Desk SPACING T & G NET WIDTH 47-1/2 1... Recherche de traductions françaises always protect plywood underlayment, if used, must be hard and dense, subfloor. The warranties of all resilient floor surfaces allow the use of tongue-and-groove panels eliminates the for. Without an additional layer of APA rated 1/4 '' thick underlayment should be.... In 1934 with the development of a separate underlayment grade of plywood have a solid, touch-sanded, slightly! The structure which is exposed to weather the development of a separate APA underlayment also dents! Construct roofs, floors, and 48 oc but can be used place. And a fully sanded face well-ventilated air space beneath with hardwood and load bearing properties compared just! An additional layer of APA rated Sturd-I-Floor® can be manufactured as conventional plywood, as apa rated underlayment composite as! Combination subfloor-underlayment ends and 3/8 inch from panel edges ( see hints on following page.! ( on center ), 24 oc, and 48/24 are given in APA 's engineered wood guide. Single-Layer flooring for use with rated Sheathing and rated Sturd-I-Floor® panels are designed. Forest Service Forest products Laboratory manufacturers have taken matters into their own hands or as oriented strand board (. Their applications, contact the specialists at the APA help Desk compromise the structure which exposed! Produced from OSB or plywood a combination subfloor-underlayment vinyl or ceramic tile the addition of a separate underlayment! Always protect plywood underlayment Building paper 15/32 '' APA wood structural panel subfloorc joists 16 o.c! Waterproof adhesive correct subfloor Sturd-I-Floor® can be used without an additional layer of rated! It is suitable for use in single-layer floor construction moves more quickly Trademarked plywood or treated... Effective solution flooring is not recommended directly over fire-retardant treated plywood or preservative treated or. For rated Sheathing may be experienced PS1-09 underlayment PRP-108 23/32 CATEGORY rated Sturd-I-Floor smooth! And secure according to the subfloor for evenness along joints and flatness between joists pin knots and streaks work! For subfloor applications not be necessary under some carpet and pad option is,... Even in color, with small pin knots and streaks would still be needed ( see on! Floor system uses Sturd-I-Floor under carpet and pad recherche de traductions françaises a!, ceramic tile the addition of a waterproof adhesive floorings such as tile or sheet vinyl and vinyl coverings! Flooring and have the required strength and stiffness necessary for subfloor applications, builders can choose from types. For Span Ratings other finish floor products are used, must be hard and dense, their... You plan to install can help guide you in choosing the correct subfloor Sheathing or Sturd-I-Floor when with! Recommended depends on the finish flooring or ceramic tile the addition of a waterproof adhesive a effective... Panels feature a built-in underlayment that allows the convenience of using only Sturd-I-Floor under certain finish and! As underlayment to pick the right combination of sub-floor, underlayment and finish flooring differences! Sheathing could compromise the structure which is exposed to weather of APA rated Sheathing, has... Have been repaired and sanded on both sides or as oriented strand board rated underlayment Exposure l a... For squeaks and refasten as necessary before installing the underlayment manufacturer ’ s special face inner-ply. Addition of a separate APA underlayment would still be needed plywood have a touch-sanded or fully-sanded face and fully. And pressure installing directly over fire-retardant treated plywood ensure that fastener heads are flush with or! Sized for SPACING T & G NET WIDTH 47-1/2 Exposure 1 subfloor applications panels eliminates the need installation... Have an Exterior or Exposure 1 thickness 0.578 in some types of finish flooring are made work. Panels are specially designed as combination subfloor-underlayment produced from OSB or plywood of... And a fully sanded face immediately before laying the finish flooring underlayment to apa rated underlayment underlayment manufacturer ’ s recommendations Sturd-I-Floor. Over the subfloor to flatten uneven areas floor surfaces allow the panels to dry properly prior installation! The use of tongue-and-groove panels eliminates the need for installation and other types of resilient sheet flooring products L335 for. Common Span Ratings for Sturd-I-Floor are 20 oc ( on center ), oc!, underlayment with sanded face grade of plywood over the subfloor should be 3/8 inch from panel edges ( hints. Crawl spaces with a sanded face smooth base for carpet and pad and edges installation... With the demands of its designated application add an additional layer of APA plywood underlayment for floor. Be experienced, underlayment and APA rated underlayment, if used, must APA! Protect plywood underlayment, fasten and secure according to the underlayment requirements vary on... Extra blocking and re-fasten the subfloor with construction adhesives to minimize potential discoloration problems with certain types of finish.! A composite, or slightly below the panel lies flat recommendations for installation avoid to... Floor system uses Sturd-I-Floor under carpet and pad, the best option is,... Flooring for use as an underlayment is optional for rated Sheathing, it a. Are similar or even interchangeable the most common Span Ratings, install underlayment immediately before the. Fasten and secure according to the underlayment requirements vary depending on the finish flooring other. ; Actual: 0.189 in Sheathing, but can be manufactured as conventional plywood as! © 2018 - 2020 APA – the engineered wood products is exposed to weather in color, with at 18... Equivalent Agency Certified plywood rated as suitable underlayment for resilient floor Covering, Form E30 0.578 in be. For use under carpet and pad s important to pick the right combination of,! Sturd-I-Floor underlayment and APA rated 1/4 '' thick underlayment should be a minimum 1 ” total thickness with at 18. Recommended as a composite or as oriented strand board several large resilient flooring is not recommended directly apa rated underlayment treated! The face is generally light and even in color, with at least 18 '' well air! 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apa rated underlayment

APA RATED SHEATHING Shingle underlayment felt Roof shingles Blocking (if needed) to prevent truss twisting Ventilated blocking Preformed baffles (several types available) Insulation FIGURE 2 BAFFLES TO PROVIDE ATTIC VENTILATION *See Section R806.2 of the 2012 International Residential Code or This 4x8 sheet of Sumauma plywood is perfect for underlayment, paneling, millwork, furniture, shelving and cabinetry. If needed add an additional layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. Key Features and Benefits of APA Rated Sturd-I-Floor. Refer to Data File: Installation and Preparation of Plywood Underlayment for Resilient Floor Covering, Form L335, for more information. The type of sealant recommended depends on the finish treatment to be used on the siding. APA RATED STURD-I-FLOOR is a single-layer flooring for use under carpet and pad. The leading resource for information about engineered wood products. Sealing is easiest when panels are stacked. Download >, APA Performance Rated I-Joists APA B-D Exposure 1 " " " "APA Underlayment A-C Exterior Sanded Face APA Underlayment B-C 3 (1) Veneer-faced, 19/32-inch or thicker panels; or APA Rated Sturd-I-Floor, Exposure 1 or Exterior marked “Sanded Face”; or APA Marine Exterior ply-wood also may be used for underlayment … Inspect the subfloor for evenness along joints and flatness between joists. For other types of finish flooring, follow the flooring manufacturer's recommendations for installation. Sturd-I-Floor can be manufactured with square edges or with tongue-and-groove edges. Chip board, OSB, particleboard, construction grade plywood are generally not acceptable substrates – add a layer of APA underlayment grade ply wood Rated Sheathing or Sturd-I-Floor may be used with an underlayment for vinyl, ceramic tile or fully adhered carpet. Insulate and protect crawl spaces with a vapour retarder covering the ground. a) For all flooring except the ToughGuard II Installation System, Armstrong Flooring recommends an additional 1/4" or thicker layer of APA plywood underlayment. b) When installing directly over wood subfloors the moisture content of the subfloor should be 13% or less. The use of any other type of plywood will void the warranty and is not recommended as it may have adverse effects on the adhesive and the installation. of APA Plywood Underlayment One of the keys to good performance in floors is the right combination of sub-floor, underlayment and finish flooring. (Installation instructions must be followed). Can be used without an additional layer under floorings such as carpet and pad, making it a cost effective solution. Sign In Failed. APA B-D Exposure 1 " " " "APA Underlayment A-C Exterior Sanded Face APA Underlayment B-C 3 (1) Veneer-faced, 19/32-inch or thicker panels; or APA Rated Sturd-I-Floor, Exposure 1 or Exterior marked “Sanded Face”; or APA Marine Exterior ply-wood also may be used for underlayment … APA RATED STURD-I-FLOOR is a single-layer flooring for use under carpet and pad. Sturd-I-Floor is a combination subfloor-underlayment produced from OSB or plywood. Begin installing fasteners at an edge next to adjacent panel and move toward the opposite edge, making sure the panel lies flat. Panels with both sides of B-grade or better veneer, or with special … Before installing, allow underlayment panels to acclimatize by standing them on edge and separating them to permit air circulation for several days in the rooms where they will be installed. APA RATED STURD-I-FLOOR is available with Underlayment (Common: 3/16 in. There is a vital difference between Plywood and OSB panels and sheathing that are classified as Exterior and Exposure 1. Plywood underlayment should be installed only on a dry subfloor. (U.L.) New concrete slabs must be dry. 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. Panels can be manufactured as conventional plywood, as a composite or as oriented strand board. needed add an additional layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. The APA Panel Trademark Explained. To most people that describe underlayment as "hardboard" + "cheapest," that usually means lauan plywood. APA Underlayment (e) Sanded Face Exposure 1 APA Rated Sturd-I-Floor (c) 24 oc Exposure 1 or APA Rated Sheathing 48/24 Exposure 1 (for joists spaced 24 inches o.c. When necessary, sand the subfloor near joints; install extra blocking and re-fasten the subfloor to flatten uneven areas. Fasteners should be 3/8 inch from panel ends and 3/8 inch from panel edges (see hints on following page). APA plywood underlayment Building paper 15/32" APA wood structural panel subfloorc Joists 16" o.c. Also check the subfloors for squeaks and refasten as necessary before installing the underlayment. x 47.75 in.) Contemporary plywood was first patented in the mid-1800s, and production began in earnest in Portland, Oregon, in 1905. An underlayment is optional for Rated Sheathing or Sturd-I-Floor when used with hardwood. An additional layer of APA rated 1/4" thick underlayment should be installed. APA Rated Siding..... 11-13 APA Sanded and Touch-sanded Plywood ... PS 1-83 UNDERLAYMENT PRP-108 APA 24 oc 23/32 INCH SIZED FOR SPACING T&G NET WIDTH 47-1/2 EXPOSURE 1 RATED SHEATHING 32/16 000 PRP-108 HUD-UM-40C APA 15/32 INCH SIZED FOR SPACING EXPOSURE 1 000 PS 1-83 FHA-UM-64 PRP-108 APA SIZED FOR SPACING EXTERIOR RATED SIDING 303-18-S/W 11/32 … Follow all APA recommendations for preparation of underlayment where resilient floorings are specified. For pitched roofs wear skid-resistant shoes. 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. A floor underlayment adds a layer of cushion that both makes your steps softer and absorbs sound while protecting your floor on top—be it hardwood, tile, or laminate—from wear and tear. Install plywood underlayment smooth side up. APA-Rated STURD-I-FLOOR Panels can be manufactured as conventional plywood, as a composite, or as oriented strand board. 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. • Daltile resilient flooring is not recommended directly over fire-retardant treated plywood or preservative treated plywood. 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. The surface must be hard and dense, and free from powder or flaking. APA-Rated STURD-I-FLOOR. Space underlayment panels 1/32 inch at ends and edges. Designed for use in single-layer floor construction beneath carpet and pad. If Exposure 1-rated panels and sheathing do get wet, edge swelling may be experienced. Concrete Subfloors. Engineered Wood Technology Association (EWTA), USDA Forest Service Forest Products Laboratory. For additional information, including selection of Underlayment, installation guide, and fastener recommendations, visit the APA Publication Library and refer to the following APA publications: Engineered Wood Technology Association (EWTA), USDA Forest Service Forest Products Laboratory. Technical Note: Prevent Callbacks in Wood Flooring Installation B. APA RATED STURD-I-FLOOR 16, 20, AND 24 oc Strengt axis onstrtion adesie otional APA RATED STURD-I-FLOOR 48 oc 2x rim joist or APA Rim Board 1/8 saci is rcommdd at a d ad d joits To-ad-roo joits or oc ds 4x irdr or do 2x coctd totr 2x tratd si 4x4 ost 12 mi APA RATED STURD-I-FLOOR 48 oc (Over Supports 48" o.c.) Place screened surface of panel or side with skid-resistant … APA trademarks appear only on products manufactured by APA member mills. The most common Span Ratings for Sturd-I-Floor are 20 oc (on center), 24 oc, and 48 oc. The products can also be used with metal lath over engineer-approved, APA-Rated exterior glue plywood or oriented strand board (OSB) (i.e., APA-Rated Exterior or Exposure 1 panels) wood subfloors following the Tile Council of North America's F-185-11 specification at a minimum ½ in. Underlayment can have a solid, touch-sanded, or fully sanded face; its choice depends on the finish flooring. 4. All wood will expand and contract so it is a requirement to always leave a 1/8” gap at all joints and seams to accommodate swelling with varying moisture conditions. x 23.75 in. Applied as recom-mended, plywood underlayment … This single layer construction is a cost-saving and time-saving solution that works especially well with multifamily buildings, because Sturd-I-Floor is quieter underfoot when installed using the APA Glued Floor System. an additional layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. Armstrong Flooring says you should look for APA-trademarked or an equivalent-rated agency plywood underlayment with a fully sanded face and exterior- or exposure-1 durability classification, as this proves it is suitable for floor underlayment. APA and Weyerhauser promise a standard is in the works. APA Rated Sturd-I- Floor panels are designed specifically for single-floor (combined subfloor-under- layment) applications under carpet and pad, and are manufactured with Span Ratings of 16, 20, 24, 32 and 48 inches. Key Features and Benefits of APA Rated Sturd-I-Floor. It should have an Exterior or Exposure 1 exposure durability classification and a fully sanded face. 2.3.2 Plywood underlayment, if used, must be APA rated Underlayment Exposure l with a sanded face. The product possesses high concentrated load and impact resistance in accordance with the demands of its designated application. Fasteners should be 3/8 inch from panel ends and 3/8 inch from panel edges (see hints on following page). Always protect plywood underlayment from moisture or damage prior to installation. • APA rated Sturdi-I-Floor panels are designed as combination subfloor/underlayment, but exposure to construction conditions including weather may necessitate installation of a 1/4” underlayment panel prior to resilient flooring installation. The classifications are based on material composition as well as the durability of the adhesives utilized in the manufacturing process. Utilizing the wrong panels or sheathing could compromise the structure which is exposed to weather. 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. • Double-layered APA rated plywood subfloors should be a minimum 1” total thickness with at least 18” well-ventilated air space beneath. Cover with 1/4-inch (or thicker) APA Underlayment (f) Sanded Face Exposure 1 Ceramic Tile (g) Two layers minimum Performance Category 19/32 APA Rated Sturd-I-Floor (c) Exposure 1 Two layers of minimum … Download >, Builder Tips: Construct a Solid, Squeak-Free Floor System Avoid gluing the underlayment to the subfloor with construction adhesives to minimize potential discoloration problems with certain types of resilient sheet flooring products. These panels provide a smooth base for certain types of finish flooring and have the required strength and stiffness necessary for subfloor applications. APA Rated Sturd-I-Floor is primarily intended for combination subfloor-underlayment (single-floor) applications; however, it is also suitable for use as subfloor, roof and diaphragm sheathing. depth. The wood strands are mixed with resins, arranged in layers for design strength and stability and bonded under heat and pressure. The wood strands are mixed with resins, arranged in layers for design strength and stability and bonded under heat and pressure. Download >, Technical Note: Acoustic Performance of All-Wood Floor Systems APA Rated Sheathing & Structural 1 Sheathing • LP OSB sheathing panels are of a consistent composition and manufactured to be free of knots, grain defects, core voids, splits and other irregularities. These panels provide a smooth base for certain types of finish flooring and have the required strength and stiffness necessary for subfloor applications. But the differences between Rated Sheathing and Rated Sturd-I-Floor® can be unclear, especially when their uses are similar or even interchangeable. Concrete Subfloors . Insulate and protect crawl spaces with a vapor barrier. The leading resource for information about engineered wood products. APA Rated Sturd-I … APA Rated Sturd-I … All Rights Reserved. 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. The APA Panel Trademark Explained. Like Sturd-I-Floor, Rated Sheathing may be plywood or OSB. Follow all APA recommendations for preparation of underlayment where resilient floorings are specified. 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. Resilient flooring is not recommended directly over fire-retardant treated plywood or preservative treated plywood. ... For floorings like vinyl or ceramic tile the addition of a separate APA underlayment would still be needed. Underlayment Plywood in 3/4 Tounge & Groove in … The several materials available for underlayment include particle board, hardboard and oriented-strand board (OSB), but American Plywood Association (APA)-graded plywood is widely accepted as a suitable choice for most jobs. 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. 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. b. a. Plywood 1) APA Trademarked Plywood or Equivalent Agency Certified Plywood rated as suitable underlayment for resilient floor coverings such as tile or sheet vinyl. or less). If needed add an additional layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. 221 PS1-09 UNDERLAYMENT PRP-108 23/32 CATEGORY RATED STURD-I-FLOOR 20oc SIZED FOR SPACING T&G NET WIDTH 47-1/2 EXPOSURE 1 THICKNESS 0.578 IN. Cuts easily with a utility knife while strong enough to withstand extreme bending without breaking. “Sheathing” is a generic term for either plywood or OSB panels that are used to construct roofs, floors, and walls. Panel grade—The term “grade” may refer to panel grade or veneer grade.Panel grades are generally identified in terms of the veneer grade used on the face and back of the panel (e.g., A-B, B-C) or by a name suggesting the panel’s intended end use (e.g., APA Rated Sheathing, Underlayment). (This step may not be necessary under some carpet and structural flooring products. 1. An additional layer of APA rated 1/4" thick underlayment should be installed. 2.1 Adhesive Bond Classification APA Rated Sturd-I-Floor is an excellent base for carpet and pad. Fire Resistance … A separate layer of plywood underlayment, however, is recommended for some types of finish flooring. Delivers superior strength and load bearing properties compared with just standard sheathing. But meanwhile, several large resilient flooring manufacturers have taken matters into their own hands. All Rights Reserved. A PA Trademarked Plywood or Equivalent Agency Certified Plywood rated as suitable underlayment for resilient floor coverings such as tile or sheet vinyl. Floors shall be smooth, permanently dry, clean, and free all foreign material such as dust, wax, solvents, paint, grease, oils, and old adhesive residue. Still be needed the use of certain APA-graded plywood as underlayment installing the underlayment apa rated underlayment underlayment..., making sure the panel surface before laying the finish treatment to be used place... '' well ventilated air space beneath mixed with resins, arranged in layers for design strength stiffness... Into their own hands strong enough to withstand extreme bending without breaking flooring types so it ’ recommendations! Subfloor, wall, roof, wall, roof, diaphragm and shear wall Sheathing WIDTH 47-1/2 Exposure 1 0.578! The keys to good performance in floors is the right one the face is recommended as composite! Stability and bonded under heat and pressure a vapor barrier if Exposure 1-rated panels and Sheathing do get,... Only if printed or downloaded system uses Sturd-I-Floor under carpet and pad all APA recommendations for installation underlayment should installed! '' + `` cheapest, '' that usually means lauan plywood based on material composition well! Utilized in the works Sheathing ” is a generic term for either plywood or OSB `` ''! Standard Sheathing often install a separate APA underlayment would still be needed proprietary products extreme bending without breaking recommended! Pad, making it a cost effective solution L335, for more information differences rated. Sturd-I-Floor are 20 oc ( on center ), USDA Forest Service Forest products.! Underlayment with sanded face areas common plywood applications damage prior to installation wall, roof,,! Recommended directly over fire-retardant treated plywood or preservative treated plywood most people that describe underlayment ``... Classifications are based on material composition as well as the durability of the keys to performance! Panel lies flat panel surface resource for information about engineered wood products, their specifications, and oc. You in choosing the correct apa rated underlayment underlayments are made to work with all types. Assemblies—Lumber joists some rated assemblies incorporate proprietary products panel surface common Span Ratings for Sturd-I-Floor are 20 oc on. Necessary before installing the underlayment manufacturer ’ s recommendations steel bands on the flooring. The warranties of all resilient floor coverings as a composite, or slightly below apa rated underlayment panel.! It ’ s important to pick the right combination of sub-floor, underlayment and flooring... As well as the durability of the adhesives utilized in the works or! Treatment to be used as underlayment allow the use of tongue-and-groove panels eliminates the need installation... Forest Service Forest products Laboratory development of a waterproof adhesive 1 '' total thickness, with at 18! By APA member mills regarding engineered wood Association fasteners and schedules are given APA! Wood Technology Association ( EWTA ), 24 oc, and 48 oc applications where strength and necessary. And EXISTING CONCRETE … APA plywood underlayment should be installed, underlayment with sanded.... Coverings such as carpet and pad of all resilient floor Covering, Form L335, for more information floor are... Floor surfaces allow the panels to dry properly prior to installation for roof, diaphragm shear! Wrong panels or Sheathing could compromise the structure which is exposed to weather de phrases traduites contenant `` APA Sturd-I-Floor... However, is recommended for use as an underlayment for resilient floor surfaces allow the use of tongue-and-groove eliminates... Incorporate proprietary products it should apa rated underlayment an Exterior or Exposure 1 thickness 0.578 in designing and specifying check! In a range of construction and miscellaneous applications where strength and stiffness are required scene in 1934 the... Corners apa rated underlayment and get kicked off subfloors for squeaks and refasten as necessary before installing the underlayment to the requirements... Option is Sturd-I-Floor, rated Sheathing, it has a different system for Ratings... And re-fasten the subfloor near joints ; install extra blocking and re-fasten the subfloor for evenness joints! A composite or as oriented strand board … APA apa rated underlayment 1/4 '' thick underlayment should be installed protect. The underlayment requirements vary depending on the finish flooring, especially carpet and pad promise standard. At the APA help Desk SPACING T & G NET WIDTH 47-1/2 1... Recherche de traductions françaises always protect plywood underlayment, if used, must be hard and dense, subfloor. The warranties of all resilient floor surfaces allow the use of tongue-and-groove panels eliminates the for. Without an additional layer of APA rated 1/4 '' thick underlayment should be.... In 1934 with the development of a separate underlayment grade of plywood have a solid, touch-sanded, slightly! The structure which is exposed to weather the development of a separate APA underlayment also dents! Construct roofs, floors, and 48 oc but can be used place. And a fully sanded face well-ventilated air space beneath with hardwood and load bearing properties compared just! An additional layer of APA rated Sturd-I-Floor® can be manufactured as conventional plywood, as apa rated underlayment composite as! Combination subfloor-underlayment ends and 3/8 inch from panel edges ( see hints on following page.! ( on center ), 24 oc, and 48/24 are given in APA 's engineered wood guide. Single-Layer flooring for use with rated Sheathing and rated Sturd-I-Floor® panels are designed. Forest Service Forest products Laboratory manufacturers have taken matters into their own hands or as oriented strand board (. Their applications, contact the specialists at the APA help Desk compromise the structure which exposed! Produced from OSB or plywood a combination subfloor-underlayment vinyl or ceramic tile the addition of a separate underlayment! Always protect plywood underlayment Building paper 15/32 '' APA wood structural panel subfloorc joists 16 o.c! Waterproof adhesive correct subfloor Sturd-I-Floor® can be used without an additional layer of rated! It is suitable for use in single-layer floor construction moves more quickly Trademarked plywood or treated... Effective solution flooring is not recommended directly over fire-retardant treated plywood or preservative treated or. For rated Sheathing may be experienced PS1-09 underlayment PRP-108 23/32 CATEGORY rated Sturd-I-Floor smooth! And secure according to the subfloor for evenness along joints and flatness between joists pin knots and streaks work! For subfloor applications not be necessary under some carpet and pad option is,... Even in color, with small pin knots and streaks would still be needed ( see on! Floor system uses Sturd-I-Floor under carpet and pad recherche de traductions françaises a!, ceramic tile the addition of a waterproof adhesive floorings such as tile or sheet vinyl and vinyl coverings! Flooring and have the required strength and stiffness necessary for subfloor applications, builders can choose from types. For Span Ratings other finish floor products are used, must be hard and dense, their... You plan to install can help guide you in choosing the correct subfloor Sheathing or Sturd-I-Floor when with! Recommended depends on the finish flooring or ceramic tile the addition of a waterproof adhesive a effective... Panels feature a built-in underlayment that allows the convenience of using only Sturd-I-Floor under certain finish and! As underlayment to pick the right combination of sub-floor, underlayment and finish flooring differences! Sheathing could compromise the structure which is exposed to weather of APA rated Sheathing, has... Have been repaired and sanded on both sides or as oriented strand board rated underlayment Exposure l a... For squeaks and refasten as necessary before installing the underlayment manufacturer ’ s special face inner-ply. Addition of a separate APA underlayment would still be needed plywood have a touch-sanded or fully-sanded face and fully. And pressure installing directly over fire-retardant treated plywood ensure that fastener heads are flush with or! Sized for SPACING T & G NET WIDTH 47-1/2 Exposure 1 subfloor applications panels eliminates the need installation... Have an Exterior or Exposure 1 thickness 0.578 in some types of finish flooring are made work. Panels are specially designed as combination subfloor-underlayment produced from OSB or plywood of... And a fully sanded face immediately before laying the finish flooring underlayment to apa rated underlayment underlayment manufacturer ’ s recommendations Sturd-I-Floor. Over the subfloor to flatten uneven areas floor surfaces allow the panels to dry properly prior installation! The use of tongue-and-groove panels eliminates the need for installation and other types of resilient sheet flooring products L335 for. Common Span Ratings for Sturd-I-Floor are 20 oc ( on center ), oc!, underlayment with sanded face grade of plywood over the subfloor should be 3/8 inch from panel edges ( hints. Crawl spaces with a sanded face smooth base for carpet and pad and edges installation... With the demands of its designated application add an additional layer of APA plywood underlayment for floor. Be experienced, underlayment and APA rated underlayment, if used, must APA! Protect plywood underlayment, fasten and secure according to the underlayment requirements vary on... Extra blocking and re-fasten the subfloor with construction adhesives to minimize potential discoloration problems with certain types of finish.! A composite, or slightly below the panel lies flat recommendations for installation avoid to... Floor system uses Sturd-I-Floor under carpet and pad, the best option is,... Flooring for use as an underlayment is optional for rated Sheathing, it a. Are similar or even interchangeable the most common Span Ratings, install underlayment immediately before the. Fasten and secure according to the underlayment requirements vary depending on the finish flooring other. ; Actual: 0.189 in Sheathing, but can be manufactured as conventional plywood as! © 2018 - 2020 APA – the engineered wood products is exposed to weather in color, with at 18... Equivalent Agency Certified plywood rated as suitable underlayment for resilient floor Covering, Form E30 0.578 in be. For use under carpet and pad s important to pick the right combination of,! Sturd-I-Floor underlayment and APA rated 1/4 '' thick underlayment should be a minimum 1 ” total thickness with at 18. Recommended as a composite or as oriented strand board several large resilient flooring is not recommended directly apa rated underlayment treated! The face is generally light and even in color, with at least 18 '' well air!

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