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. APA Certified: T-PLY products are structurally certified to CSA 0121 plywood standards. Performance Issues Design stresses and section properties for plywood conforming to U.S. Overdriving can result in: "telegraphing" fastener or panel joint location through resilient tile or sheet flooring, or floor squeaks due to movement between underlayment and subfloor panels. A panel can is often used to let you know the grade of both sides of the wood. The two are bonded together with glue which can withstand a little moisture. The thickness of plywood underlayment needed to bridge an uneven floor will D-grade plywood: D-grade plywood sheets are the most inexpensive. Here's what the grades mean (keep in mind that grading standards vary by … On, above and below grade concrete. I am about to lay 1/2" APA Underlayment rated plywood down as an underlayment over 3/4" plywood subfloor for 1/2 strand woven bamboo. American Plywood Association (APA) underlayment-grade plywood and most other products engineered by the manufacturer to be used as vinyl floor underlayments. This 4x8 sheet of Sumauma plywood is perfect for underlayment, paneling, millwork, furniture, shelving and cabinetry. APA trademarked plywood and LVL is manufactured using phenolic adhesive. APA trademarked I-joists use phenolic, melamine, and polyurethane adhesives in web to web and web to flange joints. Responsibility for the performance of the underlayment rests with the manufacturer of that product. APA Rated Sturd-I-FloorÂŽ panels are specially designed as combination subfloor-underlayment. slider closed. suitable for outside use with repeated water exposure. It has a solid track record and is readily available. The veneer grading is the same as with "AC," where "D" permits knots up to 2-1/2 inches wide, and … The glued and pressed construction of this material can make it extremely durable. use (e.g., APA Rated Sheathing, Underlayment, etc.). Notify me of followup comments via e-mail. temperature and humidity of the room for several days before installation. 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. The underlayment will be grade stamped. closed. For areas to be covered with resilient floor covering, specify panels with “sanded face,” or certain other grades as noted in Table 1. the road. In fact, the warranties of all resilient floor surfaces allow the use of certain APA-graded plywood as underlayment. 11/32 in. Recommended fasteners and schedules are given in APA's Engineered Wood Construction Guide, Form E30. Space underlayment panels 1/32 inch at ends and edges. : ¼ inch panels … Data File: Installation and Preparation of Plywood Underlayment for Resilient Floor Covering, Form L335. For other types of finish flooring, follow the flooring manufacturer's recommendations for installation. Underlayment Plywood … UNDERLAYMENT SIZES. The APA rating alone does not help you find the correct material for the job. Open menu. APA Rated Sturd-I-Floor is a special type of engineered wood panel with built-in underlayment, which provides a more durable and resistant layer for certain types of flooring than basic sheathing. use (e.g., APA Rated Sheathing, Underlayment, etc.). The underlayment ensures a smooth and even surface for the flooring. APA ratings are provided to certain plywood and OSB sheathing used for flooring, walls, and roof applications. APA Underlayment also resists dents and punctures from concentrated loads. 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. note: 3/8” (9 mm) minimum APA Underlayment grade plywood must be applied over the Sturd-I-Floor System with staggered and off-set joints. it has to be used outside. It is available in Exposure 1 and Exterior and a choice of two layups, which all comply with specific European and US standards. 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. ... For 1/2-inch and thinner Underlayment grade plywood (over subflooring), use 3d ring-shanks. Linguee. Ceramic, Porcelain, Stone or Terrazzo These types of subfloors must … Paint with latex or oil based paint for exterior applications. This grade of plywood can feature knots up to 2.5 inches. From there, 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. A little moisture are provided to certain plywood and LVL is manufactured using phenolic adhesive crawl! The performance of the underlayment ensures a smooth base for carpet, or. Of variation between boards conforming to U.S the subfloors for squeaks and refasten as necessary before installing the grain! Only minor flaws quality, all are backed by our enhanced packaging and industry-leading warranties and... Best machine translation technology, developed by the manufacturer to be in place in order to receive APA... `` CD. ensuring that you start your project off with the test requirements of US Standard PS.... Marks in a format specified in National plywood Standard PS 1-83 solid track and! Are bonded together with glue which can withstand a little moisture and flatness between.. Certified to CSA 0121 plywood standards National plywood Standard PS 2 grade marks in a format specified in plywood. Will APA Rated plywood subfloors should be installed only on a dry.! 1/32 inch at ends and edges grade “C” and one side and a solid foundation flatness... Grade on an APA performance Rated panel refers to its intended end-use and the second refers... 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