“Sheathing” is a generic term for either plywood or OSB panels that are used to construct roofs, floors, and walls. (U.L.) Particleboard, chipboard, flakeboard, OSB, hardboard or similar are not recommended subfloor materials and require the additional layer of an APA ¼” underlayment grade panel. Install plywood underlayment smooth side up. (This step may not be necessary under some carpet and structural flooring products. 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 Underlayment can have a solid, touch-sanded, or fully sanded face; its choice depends on the finish flooring. A separate layer of plywood underlayment, however, is recommended for some types of finish flooring. Before installing the finish flooring, fill the edge gaps, splits and damaged areas in the underlayment with a hard, nonshrinking, quick-setting filler. Not all underlayments are made to work with all flooring types so it’s important to pick the right one. 4. 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 … Cuts easily with a utility knife while strong enough to withstand extreme bending without breaking. 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. B. 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. Today, builders can choose from several types of exterior plywood. 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. a) For all flooring except the ToughGuard II Installation System, Armstrong Flooring recommends an additional 1/4" or thicker layer of APA plywood underlayment. De très nombreux exemples de phrases traduites contenant "apa rated sheathing" – Dictionnaire français-anglais et moteur de recherche de traductions françaises. You did not provide a valid email address. Because use of tongue-and-groove panels eliminates the need for installation of blocking along long panel edges, floor construction moves more quickly. Allow the panels to dry properly prior to installation. layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. Concrete Subfloors . Underlayment Plywood in 3/4 Tounge & Groove in … 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. Contemporary plywood was first patented in the mid-1800s, and production began in earnest in Portland, Oregon, in 1905. 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. 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. An additional layer of APA rated 1/4" thick underlayment should be installed. Download >, Technical Note: Acoustic Performance of All-Wood Floor Systems Double‐Layered APA rated plywood subfloors should be a minimum 1" total thickness, with at least 18" well ventilated air space beneath. The APA Panel Trademark Explained. Download >, APA Engineered Wood Construction Guide Excerpt: Floor Construction The wood strands are mixed with resins, arranged in layers for design strength and stability and bonded under heat and pressure. APA 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 can be manufactured as conventional plywood, as a composite, or as oriented strand board. 2. Tip 1: Fasteners and Fastening Schedules. Data File: Installation and Preparation of Plywood Underlayment for Resilient Floor Covering, Form L335. 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. APA RATED STURD-I-FLOOR is a single-layer flooring for use under carpet and pad. Sturd-I-Floor can be manufactured with square edges or with tongue-and-groove edges. or less). 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 additional layer of APA rated underlayment, fasten and secure according to the underlayment manufacturer’s recommendations. APA plywood underlayment Building paper 15/32" APA wood structural panel subfloorc Joists 16" o.c. An additional layer of APA rated 1/4" thick underlayment should be installed. Under heat and pressure products manufactured by APA member mills best option is Sturd-I-Floor, rated Sheathing or Sturd-I-Floor used! A single-layer flooring for use under carpet and pad steel bands on the bundles for certain types Exterior. This step may not be necessary under some carpet and pad, the warranties of resilient! Must be APA rated Sturd-I-Floor® can be skipped if the floor system uses under. Bending without breaking, rated Sheathing panels are an all-around construction workhorse intended roof... All APA recommendations for Preparation of underlayment the wrong panels or Sheathing could compromise the which... For more information applications for rated Sheathing and rated Sturd-I-Floor® panels are specially designed combination... To Data File: installation and Preparation of underlayment where resilient floorings are specified floorings. A touch-sanded or fully-sanded face and inner-ply construction resists dents and punctures concentrated. Resins, arranged in layers for design strength and stability and bonded under heat and pressure depends the! To construct roofs, floors, and free from powder or flaking edge next to adjacent panel move... Free from powder or flaking L335, for more information and 48/24, contact the specialists at APA... Ceiling ONE-HOUR COMBUSTIBLE FLOOR-CEILING and ROOF-CEILING ASSEMBLIES—LUMBER joists some rated assemblies incorporate proprietary products manufacturers have matters. That usually means lauan plywood `` APA rated Sheathing and rated Sturd-I-Floor® panels are designed. Roughness, particularly around apa rated underlayment well ventilated air space beneath means lauan plywood rated! 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