WOOD SUBSTRATES I. GENERAL INFORMATION Resinous flooring must always be applied directly to exterior grade plywood with extended glue line. INTERIOR GRADE PLYWOOD delaminates easily and SHOULD NOT BE USED as it could result in a failure of the resinous flooring system. MARINE GRADE PLYWOOD contains moisture repellants which could cause a darkening of the resinous flooring system and SHOULD NOT BE USED. All plywood must be completely free of all waxes, varnishes, or other foreign materials. A. Plywood used to cover existing wood floors 1. Clean and fasten existing wood floor to the floor joists. 2. If the floor is completely sound, fasten ½ Exterior grade plywood "C" plugged with an extended glue line to the existing floor. Stagger the plywood for strength. 3. ¾" DFPA Exterior or ¾" DFPA Underlayment grade plywood with exterior glue line must be used if the existing floor cannot be cleaned, or is not sound. 4. All plywood must be completely free of all waxes, varnishes, or other foreign materials. 5. Secure plywood with exterior glue. 6. Use Ring Shank or Wood Screws at six (6) inch centers around panel edges and support. 7. Stagger all panel joints, fill joints with epoxy filler, and cover joints with fiberglass cloth and epoxy resin. 8. Lightly sand the floor surface to insure proper adhesion of the resinous flooring system. 9. Prime surface with appropriate primer prior to system application. Surface may require double priming due to porosity of plywood. B. Plywood used for new construction (plywood is laid directly on the joist)1. ¾" exterior grade plywood "C" plugged with an extended glue line must be used. All plywood must be completely free of all waxes, varnishes, or other foreign materials. 2. Use Ring Shank or Wood Screws at six (6) inch centers around panel edges and support. 3. Stagger all panel joints, fill joints with epoxy filler, and cover joints with fiberglass cloth and Epoxy.com Product #703. 4. Lightly sand the floor surface to insure proper adhesion of the resinous flooring system. 5. Remove all dust with a vacuum cleaner. C. Applications with waterproofing: 1. After preparing the floor surface as prescribed above, caulk all joints with Epoxy.com Product #703. 2. Apply the waterproofing membrane as specified. |
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