![]() Plywood and Wooden Substrates: All plywood floors (including subfloors) shall be engineered to meet all ANSI requirements.When used to install tile in any area that will be continually wet (shower receptors, swimming pools, et cetera) allow mortar to cure a minimum of fourteen (14) days before exposure to water. For hot and dry conditions, lightly dampen the surface with water leaving no standing water. Smooth concrete should also be roughened to ensure a mechanical bond. Test again to ensure that water is absorbed into the substrate before proceeding with the installation. If water beads up and does not absorb into the substrate, scarify surface via mechanical abrasion with a Carborundum disk followed by a clear water wash. Test to confirm that concrete can absorb water by sprinkling water droplets. Concrete shall be free of any efflorescence and hydrostatic pressure. Surfaces may be cleaned with sulfamic acid ( SGM Safe Clean Crystals) then thoroughly flushed and neutralized. Remove any liquid curing agents or concrete sealers, followed by a clear water wash. The slab should have a steel trowel or broom swept finish. Concrete and Plaster Surfaces: All floors should be twenty-eight (28) days cured and shall be structurally sound, clean, and free of any moisture, wax, oil, paint particles, curing agents, or foreign matter. ![]()
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