A system of APA panels over sleepers embedded in mastic has been successfully installed over concrete slabs. Tongue-and-groove panels eliminate blocking between sleepers at panel edges and allow air circulation beneath the floor. Use only panels marked Exterior or Exposure 1. A vapor barrier is essential directly above or below the slab. Preservative treatment of the sleepers is recommended when the slab is on or below grade, although panels normally will not require treatment.
Tongue-and-groove plywood can be installed over polystyrene or polyurethane foam. The foam, bonded to both the plywood and concrete slab with mastic, provides high insulating value and resistance to termites, rot and fungus. Exterior plywood at least 15/32 inch thick is recommended. A vapor barrier such as polyethylene is required either directly above or below the concrete slab.
Special Floor Surfacing
Hardboard overlaid plywood (APA PLYRON®) is sometimes used as a finish floor, especially for industrial installation. (Check your local dealer for availability.) High Density Overlay (HDO) panels with a special heavy-duty screen-grid surface provide skid-resistant, long-wearing surfaces under foot traffic. And a number of liquid coatings - some suitable for balconies, porches, patio decks and other exterior applications - are also available.
| ADDITIONAL INFORMATION About APA - The Engineered Wood Association and Engineered Wood Systems APA - The Engineered Wood association is a nonprofit trade association whose member mills produce approximately. 75 percent of the structural wood panel products manufactured in North America. The Association's trademark appears only on products manufactured by member mills and is the manufacturer's assurance that the product conforms to the standard shown on the trademark. That standard may be an APA performance standard, the Voluntary Product Standard PS 1-95 for Construction and Industrial Plywood or Voluntary Product Standard PS 2-92, Performance standards for Wood-Based Structural-Use Panels. Panel quality of all APA trademarked products is subject to verification through APA audit. APA's services go far beyond quality testing and inspection. research and promotion programs play important roles in developing and improving plywood and other panel construction systems, and in helping users and specifies to better understand and apply panel products. Always insist on panels bearing the mark of quality-the APA trademark. Your APA panel purchase is not only your highest possible assurance of product quality, but an investment in the many trade services that APA provides on your behalf. The APA EWS trademarks appears only on engineered wood product manufactured by members of Engineered Wood Systems, a related corporation of APA. The mark signifies that the manufacturer is committed to a rigorous program of quality verification and testing and that products are manufactured in conformance with an APA or national standard such as ANSI Standard A190.1, American National Standard of structural Glued Laminated Timber. For additional information on wood construction system, contact APA - The Engineered Wood Association,P.O. Box 11700, Tacoma, Washington 98411-0700, or the nearest APA regional field office listed on the back cover. For a list of additional APA and Engineered Wood Systems publications, request the: APA Publications Index, Form B300 EWS Publications Index, Form S400 |
RESIDENTIAL & COMMERCIAL DESIGN/CONSTRUCTION GUIDE We have field representatives in most major U.S. cities and in Canada who can help answer questions involving APA and APA EWS trademarked products. For additional assistance in specifying APA engineered wood products, get in touch with your nearest APA regional office. Call or write: WESTERN REGION 7011 So. 19th St. • P.O. Box 11700 Tacoma, Washington 98411-0700 (253) 565-6600 • Fax: (253)565-7265 EASTERN REGION 2130 Barrett Park Drive, Suite 102 Kennesaw, Georgia 30144-3681 (770) 427-9371 • Fax: (770) 423-1703 U.S. HEADQUARTERS AND INTERNATIONAL MARKETING DIVISION 7011 So. 19th St. • P.O. Box 11700 Tacoma, Washington 98411 -0700 (253) 565-6600 • Fax: (253) 565-7265 Internet Address http://www.apawood.org PRODUCT SUPPORT HELP DESK (253) 620-7400 E-mail Address: help@apawood.org (Offices: Antwerp, Belgium; London, United Kingdom; Hamburg, Germany; Mexico City, Mexico; Tokyo, Japan.) For Caribbean/Latin America, contact headquarters in Tacoma. The product use recommendations in this publication are based on the continuing programs of laboratory testing, product reach, and field experience of APA - The Engineered Wood Association and Engineered Wood Systems. However, because APA and Engineered Wood Systems have no control over quality of workmanship or the conditions under which structural panels and engineered wood products are used, those organizations cannot accept responsibility for product performance or designs as actually constructed. Because engineered wood product performance requirements vary geographically, consult your local architect, engineer or design professional to assure compliance with code, construction, and performance requirements. Form No. E30Q/Revised November 1998/0400 |
APA
The Engineered Wood Association