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than 15/32" thick. Contad Mule-Hide for maximum membrane sheet widths, <br /> fastener sizes and spaang when using plywood, as requirements will change <br /> with thickness used. Insulation, barrier board or sli�heet may be required under <br /> the membrane. <br /> 3. Structural concrete and pre-casf, pre-stressed concrete (3,000 psi minimum) <br /> shall be cured and dry to industry standards. Surfaces shall be smooth and free <br /> of moisture or frost. All sharp ridges or other projedions above the surtace shall <br /> be removed before roafing. An insulation, barrier board or slip sheet is required <br /> under the membrane. <br /> 4. Lightweight Insulating Concrete Fill and Metal Formwork (minimum 24-gauge <br /> rnetal fomiv�rork) — the roaf deck shall be cured and dry to the deck <br /> manufacturer's and/or industry star�ards and shall be smooth and free o� ridges <br /> and depressions. All necessary venting as recomrnended boy the roa�f dedc <br /> manufacturer shall be accomplished. These decks may be acceptable to receive <br /> a Meehanically Attached Mul��lide PVC Membrane RoaFing System after pullout <br /> tests have beer� completed and appropriate fasteners have been seleded. <br /> 5. Wood plank (1" minimum) shall conform to Factory Mutual's requirements for <br /> Class 1 impregnated decks. M insulation, barrier board or slip sheet is required <br /> under the membrane. <br /> 6. Cementitious Wood Fiber Decks - Certan cementitious wood fiber decks may be <br /> acceptable to receive a Mechanically Attached Mule-Hide PVC M�nbrane <br /> Roofing System after pullout tests have been completed and appropriate <br /> festeners have been seleded. <br /> 7. Gypsum Deck - shaN be cured and dry to manufacture►'s and/or industry <br /> standards. The surface aF the dedc shall be smooth and free from ridges and <br /> depressions. Certain gypsum decks may be acceptable to recaive a <br /> Mechanically Attached Mul�Hide P'VC Membrane Roafing System after pullout <br /> tests have been completed and appropriate fasteners have been selected. <br /> Insulation, slop sheet or barrier board may be required over rough surfaces or <br /> plank dedcs. <br /> 8. Oriented Strand Soard (OSB) shall be a minimum 7/16" thick. Contact Mule-Hide <br /> for acceptable sheet sizes, fastener types and spaang when using OSB as <br /> requirements will change with thidcness used. Minimum thicknesses or usage <br /> restridions may change depending on local code requirements. Pullout tests <br /> must be performed and submitted to Mule-Hide prior to bidding the project. <br /> Minimum pullout valuss of 250 Ibs are required. An insulation, berrier board or <br /> slip sheet is required under the membrane. Fasteners and sheet sizes shall be <br /> determined by pullout values. <br /> 3.03 Preparation of Existing Substrate <br /> A. General <br /> 1. To prevent delays or interruptions, coordinate work with other tredes or suppliers <br /> to ensure that components to be incorporated into the Mechanically Attached <br /> Mule-Hide PVC Membrane R�ng System are �vailable as the w�ork <br /> progresses. Examine substrates to which the roofiing materials are to be applied <br /> to ensure that their condition is satisfactory for the Mule-Hide PVC Membrane <br /> Roofing Sysfem application. Do not peRnit vads greater than 1/4" width in the <br /> substrate. Concrete substrates shall be cured and free of laitance and curing <br /> compounds. Substrates for roo�ng materials shall be dry and free of oil, dirt, <br /> grease, sharp edges and debris. Inspect substrates and corred defects before <br /> application af �ng membrane. <br /> 9 <br /> � <br />