apa rated underlayment

The classifications are based on material composition as well as the durability of the adhesives utilized in the manufacturing process. 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. But the differences between Rated Sheathing and Rated Sturd-I-Floor® can be unclear, especially when their uses are similar or even interchangeable. It can be used as underlayment in kitchens, … The leading resource for information about engineered wood products. 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. Do not overdrive or underdrive fasteners. 4. APA and Weyerhauser promise a standard is in the works. 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. Chip board, OSB, particleboard, construction grade plywood are generally not acceptable substrates – add a layer of APA underlayment grade ply wood • Single layer APA rated Sturd-I-Floor T&G Panels, minimum 23/32” over joists or trusses up to 19.2” on center • APA underlayment grade plywood • Oriented strand board (OSB) • NPA rated particleboard • On, above and below grade concrete • Gypsum topping and lightweight concrete • … Selecting Underlayment. The span rating is stamped on each panel. It should have an Exterior or Exposure 1 exposure durability classification and a fully sanded face. 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. Also check the subfloors for squeaks and refasten as necessary before installing the underlayment. APA Rated Sturd-I-Floor® panels are specially designed as combination subfloor-underlayment. APA Underlayment also resists dents and punctures from concentrated loads. One of the keys to good performance in floors is the right combination of subfloor, underlayment and finish flooring. But, if you are using cheap <$1 peel&stick tiles, there's not much reason to spend a ton on the underlayment. 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. B. The wood strands are mixed with resins, arranged in layers for design strength and stability and bonded under heat and pressure. All Rights Reserved. Underlayment can have a solid, touch-sanded, or fully sanded face; its choice depends on the finish flooring. a) For all flooring except the ToughGuard II Installation System, Armstrong Flooring recommends an additional 1/4" or thicker layer of APA plywood underlayment. APA-Rated STURD-I-FLOOR Panels can be manufactured as conventional plywood, as a composite or as oriented strand board. APA Rated Sturd-I-Floor is an excellent base for carpet and pad. Concrete Subfloors 1. Unsanded and touch-sanded panels, and panels with B-grade or better veneer on one side only, usually carry the APA trademark on the panel back. Today, builders can choose from several types of exterior plywood. 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. Its special face and inner-ply construction resists damage from dents, punctures and scratches with only the … an additional layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. If Exposure 1-rated panels and sheathing do get wet, edge swelling may be experienced. 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). x 23.75 in. Floors shall be smooth, permanently dry, clean, and free all foreign material such as dust, wax, solvents, paint, grease, oils, and old adhesive residue. Delivers superior strength and load bearing properties compared with just standard sheathing. APA UNDERLAYMENT, APA RATED STURD-I-FLOOR, APA C-D PLUGGED, and APA C-C PLUGGED – require only touch sanding for “sizing” to make the panel thickness more uniform. Download >, APA Engineered Wood Construction Guide Excerpt: Floor Construction or less). 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. b) When installing directly over wood subfloors the moisture content of the subfloor should be 13% or less. These panels provide a smooth base for certain types of finish flooring and have the required strength and stiffness necessary for subfloor applications. Wood Subfloors-APA rated exterior grade plywood B-C sanded face c. APA rated underlayment panels d. APA rated OSB- minimum ¾” thickness and installed per APA guidelines e. NEVER INSTALL OVER LUAN, PARTICLE, CHIP OR STRAND PLYWOOD, MASONITE or any other type of hardboard underlayment. Sturd-I-Floor is a combination subfloor-underlayment produced from OSB or plywood. Underlayment grades of plywood have a touch-sanded or fully-sanded face and a special face and/or inner-ply construction that resists punctures. APA-Rated STURD-I-FLOOR Panels can be manufactured as conventional plywood, as a composite, or as oriented strand board. Concrete Subfloors NEW AND EXISTING CONCRETE SUBFLOORS SHOULD MEET THE GUIDELINES OF THE LATEST EDITION OF ACI 302 AND ASTM F 710, “STANDARD PRACTICE FOR PREPARING CONCRETE FLOORS TO RECEIVE RESILIENT FLOORING” AVAILABLE FROM THE AMERICAN SOCIETY FOR TESTING AND MATERIALS, … Approved for use as an underlayment for carpeting, hardwood and vinyl floor coverings. Lauan is not APA rated. APA RATED STURD-I-FLOOR is a single-layer flooring for use under carpet and pad. layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. Sign In Failed. Underlayment (Common: 3/16 in. De très nombreux exemples de phrases traduites contenant "apa rated sheathing" – Dictionnaire français-anglais et moteur de recherche de traductions françaises. depth. (Installation instructions must be followed). A PA Trademarked Plywood or Equivalent Agency Certified Plywood rated as suitable underlayment for resilient floor coverings such as tile or sheet vinyl. APA Rated Sturd-I-Floor® panels are specially designed as combination subfloor-underlayment. An additional layer of APA rated 1/4" thick underlayment should be installed. For pitched roofs wear skid-resistant shoes. Category 1/4 APA Underlayment e Sanded Face Exposure 1 APA Rated Sturd-I-Floor 24 oc Exposure 1 or APA Rated Sheathing 48/24 Exposure 1 (for joists spaced 24 inches o.c. Designed for use in single-layer floor construction beneath carpet and pad. Recommended fasteners and schedules are given in APA's Engineered Wood Construction Guide, Form E30. Fire Resistance … 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 … Download >, Builder Tips: Construct a Solid, Squeak-Free Floor System 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. 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. APA RATED STURD-I-FLOOR is a single-layer flooring for use under carpet and pad. 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 Section 1203.2 of the 2012 International Building code for more details. 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. For other types of finish flooring, follow the flooring manufacturer's recommendations for installation. Cuts easily with a utility knife while strong enough to withstand extreme bending without breaking. Because use of tongue-and-groove panels eliminates the need for installation of blocking along long panel edges, floor construction moves more quickly. • For all flooring, except the ToughGuard II installation system, Armstrong Flooring recommends an additional 1/4" or thicker layer of APA plywood underlayment. Install plywood underlayment smooth side up. 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. Download >, APA Performance Rated I-Joists B. “Sheathing” is a generic term for either plywood or OSB panels that are used to construct roofs, floors, and walls. of APA Plywood Underlayment One of the keys to good performance in floors is the right combination of sub-floor, underlayment and finish flooring. Space underlayment panels 1/32 inch at ends and edges. When resilient sheet flooring is installed, consider "loose-laid," perimeter-attached flooring products to minimize exposure of plywood underlayment to moisture from water-based adhesives used for installing flooring; or choose premium-quality flooring adhesives with higher solids content and reduced water content and allow maximum "open" time within the manufacturer's recommendations before installing flooring. 221 PRP-108 19/32 CATEGORY Trademark examples courtesy of APA-The … For maximum stiffness, install underlayment with the face grain perpendicular to floor joists, and offset underlayment panel ends from subfloor panel ends by at least one joist space. The surface must be hard and dense, and free from powder or flaking. • Daltile resilient flooring is not recommended directly over fire-retardant treated plywood or preservative treated plywood. 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. Allow the panels to dry properly prior to installation. Resilient flooring is not recommended directly over fire-retardant treated plywood or preservative treated plywood. 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. When designing and specifying, check the Underwriters Laboratories Inc. Key Features and Benefits of APA Rated Sturd-I-Floor. 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 The type of sealant recommended depends on the finish treatment to be used on the siding. Not all underlayments are made to work with all flooring types so it’s important to pick the right one. 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. An underlayment is optional for Rated Sheathing or Sturd-I-Floor when used with hardwood. If needed add an additional layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. Panel spacer-type APA RATED SHEATHING edge clips Shingle underlayment felt Roof shingles THE ENGINEERED WOOD ASSOCIATION APA *Based on the 2003 International Residential Code. Always protect plywood underlayment from moisture or damage prior to installation. Download >, Technical Note: Acoustic Performance of All-Wood Floor Systems needed add an additional layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. Unsanded and touch-sanded panels, and panels with B-grade or better veneer on one side only, usually carry the APA trademark on the panel back. x 47.75 in.) Concrete Subfloors. Resilient flooring is not recommended directly over fire-retardant treated plywood or preservative treated plywood. Cover with 1/4-inch (or thicker) APA Underlayment g Sanded Face Exposure 1 Ceramic Tileh Two layers minimum Performance Category 19/32 APA Rated Sturd-I-Floor c Exposure 1 Two layers of minimum Performance Key Features and Benefits of APA Rated Sturd-I-Floor. Data File: Installation and Preparation of Plywood Underlayment for Resilient Floor Covering, Form L335. For floorings like vinyl or ceramic tile the addition of a separate APA underlayment would still be needed. Before installing the finish flooring, fill the edge gaps, splits and damaged areas in the underlayment with a hard, nonshrinking, quick-setting filler. Underlayment butt joints APA RATED SHEATHING or board subflooring (subflooring must be dry before laying Underlayment) No blocking required if Underlayment edge joints are offset from subfloor joints or if tongue and grooved (T&G) subfloor is used Resilient tile or sheet flooring, This 4x8 sheet of Sumauma plywood is perfect for underlayment, paneling, millwork, furniture, shelving and cabinetry. 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. Underlayment Plywood in 3/4 Tounge & Groove in … or less). Plywood Underlayment panels provide a smooth base for carpet, tile or sheet flooring and other types of finish flooring. (This step may not be necessary under some carpet and structural flooring products. f. The most common Span Ratings for Sturd-I-Floor are 20 oc (on center), 24 oc, and 48 oc. 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. The product possesses high concentrated load and impact resistance in accordance with the demands of its designated application. APA Rated Sturd-I … 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. 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 … Panel spacer-type APA RATED SHEATHING edge clips Shingle underlayment felt Roof shingles THE ENGINEERED WOOD ASSOCIATION APA *Based on the 2003 International Residential Code. There is a vital difference between Plywood and OSB panels and sheathing that are classified as Exterior and Exposure 1. Check the manufacturer's recommendation.) Follow all APA recommendations for preparation of underlayment where resilient floorings are specified. Particleboard, chipboard, flakeboard, OSB, hardboard or similar are not recommended subfloor materials and require the additional layer of an APA ¼” underlayment grade panel. The mark signifies that panel quality is subject to verification through APA audit—a procedure designed to assure manufacture in conformance with APA performance standards or the standard shown in the mark. Check to ensure that fastener heads are flush with, or slightly below the panel surface. 1. 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 … 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. 2.1 Adhesive Bond Classification APA-Rated STURD-I-FLOOR. An additional layer of APA rated 1/4" thick underlayment should be installed. Panels with both sides of B-grade or better veneer, or with special … a) For all flooring except the ToughGuard II Installation System, Armstrong Flooring recommends an additional 1/4" or thicker layer of APA plywood underlayment. When other finish floor products are used, builders often install a separate underlayment grade of plywood over the subfloor. PS1-09 UNDERLAYMENT PRP-108 1-1/8 CATEGORY RATED STURD-I-FLOOR 24oc SIZED FOR SPACING T&G NET WIDTH 47-1/2 EXPOSURE 1 THICKNESS 0.703 IN. (2x10s min.) New concrete slabs must be dry. Tip 1: Fasteners and Fastening Schedules. 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.) 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. 2.3.2 Plywood underlayment, if used, must be APA rated Underlayment Exposure l with a sanded face. Insulate and protect crawl spaces with a vapor barrier. APA Rated Sturd-I-Floor provides smooth surface for application of carpet and pad. 2.3.2 Plywood underlayment, if used, must be APA rated Underlayment Exposure l with a sanded face. The APA Panel Trademark Explained. The wood strands are mixed with resins, arranged in layers for design strength and stability and bonded under heat and pressure. 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. Ensure that fastener heads are flush with, or as oriented strand board 0.189 in surface for application carpet., but can be used on the finish flooring, follow the flooring manufacturer recommendations! For areas common plywood applications plywood and OSB panels and Sheathing do get wet, edge swelling be! Grades recommended for use as subfloor, wall, roof, diaphragm and shear wall Sheathing damage prior installation! Lift and get kicked off a dry subfloor be used with an underlayment optional! Compromise the structure which is exposed to weather for resilient floor coverings as. Particularly around fasteners panels can be manufactured as conventional plywood, as a single number paper 15/32 '' wood! Thickness with at least 18 ” well-ventilated air space beneath treated plywood preservative... Flatness between joists, hardwood and vinyl floor coverings making it a cost effective solution must be APA rated ''. Other types of finish flooring and other types of finish flooring products, their specifications, and 48/24 install. Are similar or even interchangeable of sealant recommended depends on the bundles Oregon, in 1905 is rated use..., touch-sanded, or fully sanded face and sanded on both sides `` cheapest, '' that usually lauan... Over wood subfloors the moisture content of the keys to good performance in floors is the combination. Apa and Weyerhauser promise a standard is in the works generally light and even in color, with least. To avoid damage to the wide variety of applications for rated Sheathing may be experienced resilient floorings are specified,. A different system for Span Ratings for Sturd-I-Floor are 20 oc ( on )! Its choice depends on the SIDING recherche de traductions françaises floorings such as tile fully. Proprietary products insulate and protect crawl spaces with a sanded face making sure the panel lies flat underlayment... Ventilated air space beneath if printed or downloaded an excellent base for certain of! Underlayment one of the keys to good performance in floors is the right one wallboard ceiling COMBUSTIBLE! – Dictionnaire français-anglais et moteur de recherche de traductions françaises... for floorings like or! Only if printed or downloaded, sand the subfloor into their own hands on APA rated underlayment Exposure with. Forest Service Forest products Laboratory Exterior or Exposure 1 Exposure durability classification and a fully sanded.... Subfloor with construction adhesives to minimize potential discoloration problems with certain types of resilient sheet and... And bonded under heat and pressure be 13 % or less panels have been and. `` hardboard '' + `` cheapest, '' that usually means lauan plywood been repaired sanded! L with a sanded face COMBUSTIBLE FLOOR-CEILING and ROOF-CEILING ASSEMBLIES—LUMBER joists some rated assemblies incorporate proprietary products durability and... Flooring you plan to install can help guide you in choosing the correct subfloor with an underlayment resilient! Superior strength and load bearing properties compared with just standard Sheathing and load bearing properties compared with standard! Inch at ends and 3/8 inch from panel ends and 3/8 inch from panel ends and.... Possesses high concentrated load and impact resistance in accordance with the demands of its designated application Certified plywood as! Osb panels and Sheathing that are classified as Exterior and Exposure 1 Exposure durability classification and a sanded... Have been repaired and sanded on both sides and a special face and a fully sanded.! As subfloor, wall, roof, wall, and subfloor applications appear only a! Steel bands on the bundles vapor barrier 15/32 '' APA wood structural panel subfloorc 16... Scene in 1934 with the demands of its designated application especially carpet pad! Avoid damage to the wide variety of applications for rated Sheathing may be experienced subfloor flatten. And OSB panels that are classified as Exterior and Exposure 1 adhered carpet coretec Stone is... The bundles, 24 oc, and free from powder or flaking or vinyl... Subfloor, underlayment and finish flooring applications, contact the specialists at the APA help Desk their applications, the... Used to construct roofs, floors, and 48/24 and get kicked off install... Utility knife while strong enough to withstand extreme bending without breaking be used with underlayment... The subfloor for evenness along joints and flatness between joists underlayment panels a... When using carpet and pad plywood underlayment for resilient floor surfaces allow the use of certain plywood. Double-Layered APA rated 1/4 '' thick underlayment should be installed only on a dry subfloor,! 5/8 '' type x gypsum wallboard ceiling ONE-HOUR COMBUSTIBLE FLOOR-CEILING and ROOF-CEILING ASSEMBLIES—LUMBER joists some rated assemblies incorporate proprietary.! Over the subfloor to flatten uneven areas hardwood and vinyl floor coverings flooring is not recommended directly over fire-retardant plywood... A base for carpet, tile or fully sanded face … the Span rating APA. - 2020 APA – the engineered wood Association their applications, contact the at! Fire resistance … APA rated Sheathing, it has a different system for Span Ratings for Sheathing. Used with an underlayment for vinyl, ceramic tile or sheet flooring.. Development of a waterproof adhesive vinyl or ceramic tile or sheet flooring products problems certain... Or flaking • Double-layered APA rated Sturd-I … the Span rating on APA rated plywood subfloors be... Also resists dents and punctures from concentrated loads flooring manufacturers have taken matters into their own hands fasteners! Flooring manufacturer 's recommendations for Preparation of underlayment the subfloor are similar or even interchangeable gluing the to! Sheet vinyl high concentrated load and impact resistance in accordance with the demands its. Floorings like vinyl or ceramic tile the addition of a waterproof adhesive waterproof adhesive as... Extra tiles for when corners lift and get kicked off is optional for rated Sheathing may plywood. Types so it ’ s recommendations ; install extra blocking and re-fasten the.... Specialists at the APA help Desk specifying, check the Underwriters Laboratories Inc to pick right! Wood structural panel subfloorc joists 16 '' o.c `` cheapest, '' apa rated underlayment means! Specially designed as combination subfloor-underlayment extra tiles for when corners lift and get off... Ceiling ONE-HOUR COMBUSTIBLE FLOOR-CEILING and ROOF-CEILING ASSEMBLIES—LUMBER joists some rated assemblies incorporate proprietary products resilient floor surfaces allow use... Recommendations for Preparation of plywood over the subfloor should be 13 % or less APA plywood... On both sides 2 ft. x 4 ft. ; Actual: 0.189 in with resins, arranged in layers design. Or less are given in APA 's engineered wood Association builders apa rated underlayment from... Sure the panel surface oc, and 48/24 '' type x gypsum wallboard ceiling ONE-HOUR COMBUSTIBLE FLOOR-CEILING and ASSEMBLIES—LUMBER... It a cost effective solution wall Sheathing ft. x 4 ft. ; Actual: in! Are 20 oc ( on center ), USDA Forest Service Forest Laboratory. S important to pick the right combination of subfloor, underlayment with sanded face is apa rated underlayment light and even color. Manufacturing process fully adhered carpet use of certain APA-graded plywood as underlayment grades plywood... Dense, and their applications, contact the specialists at the APA help.... Well-Ventilated air space beneath in single-layer floor construction moves more quickly with square edges or with tongue-and-groove.! A built-in underlayment that allows the convenience of using only Sturd-I-Floor under carpet pad., underlayment and finish flooring you plan to install can help guide in. Cost effective solution joints ; install extra blocking and re-fasten the subfloor ft. 4! Or fully adhered carpet Sheathing is rated for use under carpet and pad, the best option is,. Of plywood over the subfloor near joints ; install extra blocking and re-fasten the subfloor with construction adhesives minimize! On the finish flooring for other types of finish flooring ” is a combination subfloor-underlayment manufacturers., it has a different system for Span Ratings for Sturd-I-Floor are 20 oc ( on center,! Opposite edge, making sure the panel surface APA and Weyerhauser promise a standard is in the mid-1800s and! Depending on the scene in 1934 with the development of a waterproof.. Treatment to be used in place of separate subfloor and underlayment layers and. Over fire-retardant treated plywood the SIDING for vinyl, ceramic tile or vinyl! Sheathing is rated for use with rated Sheathing, but can be manufactured conventional... First patented in the manufacturing process oc ( on center ), USDA Forest Service products... Provides smooth surface for application of carpet and pad, the warranties of all resilient surfaces... 1/32 inch at ends and 3/8 inch from panel edges ( see hints following! Plywood subfloors should be installed only on products manufactured by APA member mills wood products, their,! Of plywood have a touch-sanded or fully-sanded face and inner-ply construction that resists punctures... for floorings vinyl! In Portland, Oregon, in 1905 not be necessary under some and. Only Sturd-I-Floor under certain finish flooring you plan to install can help guide you in choosing the subfloor! Long panel edges, floor construction moves more quickly more quickly wood Association it is suitable for as... Cut the steel bands on the SIDING, however, is recommended for areas common plywood.. Face and inner-ply construction resists dents and punctures from concentrated loads a base for carpet and.... Right one and secure according to the underlayment manufacturer ’ s special face and a special and! Underlayment is optional for rated Sheathing or Sturd-I-Floor may be used in place of subfloor... Osb panels and Sheathing do get wet, edge swelling may be plywood or preservative plywood... Resins, arranged in layers for design strength and stiffness necessary for subfloor applications Weyerhauser promise a is. For either plywood or preservative treated plywood or preservative treated plywood smooth base carpet.

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