Precast concrete decks shall be mechanically secured to minimize movement. All joints must be grouted flush. Plywood decks shall be a minimum of ½" thick, exterior grade, tongue and groove and mechanically secured to structural support according to all applicable codes. An adequate amount of fasteners shall be used as defined by local code or as specified in the construction documents. If nails are used ring shank nails are preferred. Metal decks shall be a minimum of 22 gauge. Metal decking shall be supported by adequate structural support. When gypsum board is used it shall be type and “X” have a minimum thickness of 5/8". Installation of substrate board shall follow all local code requirements. When insulation board is used under the Hydro-Tuff® membrane a cement board is required. The minimum thickness of the cement board is ½" thick. See manufacturer for approved substrate board adhesives. When insulation board is used under the membrane to provide slope to any roof deck this insulation must be a minimum of 60 psi. Extruded Polystyrene insulation is the preferred product. Contact manufacturer for additional information. Roof substrate boards shall be installed in a manner that all edge and end joints are supported by metal deck ribs. Roof substrate boards shall be staggered as recommended by manufacturer. Where required, a suitable vapor barrier membrane shall be installed to the metal deck prior to the installation of the substrate board. Expansion joints should be sealed with expansion joint manufacturers material. Detail expansion joints per manufacturers standard details. Contact Hydro-Gard for additional information concerning expansion joints. 3.03 Installation Primer 1. Apply primer to all concrete surfaces. Allow primer to dry prior to installation of membrane. Primer can be installed using a hand held sprayer and should be applied at an evenly applied rate of 300 to 600 sf per gallon. Surface profiles can differ so adjust application rate based on surface profile. Do not allow primer to pool or become contaminated with dirt or foreign substances. When applied properly surface should be tan and not blackened. Note: membrane will not adhere properly to wet primer. Ensure all primer is dry to the touch.
Precast concrete decks shall be mechanically secured to minimize movement. All joints must be grouted flush. Plywood decks shall be a minimum of ½" thick, exterior grade, tongue and groove and mechanically secured to structural support according to all applicable codes. An adequate amount of fasteners shall be used as defined by local code or as specified in the construction documents. If nails are used ring shank nails are preferred. Metal decks shall be a minimum of 22 gauge. Metal decking shall be supported by adequate structural support. When gypsum board is used it shall be type “X” and have a minimum thickness of 5/8". Installation of substrate board shall follow all local code requirements. When insulation board is used under the Hydro-Tuff® membrane a cement board is required. The minimum thickness of the cement board is ½" thick. See manufacturer for approved substrate board adhesives. When insulation board is used under the membrane to provide slope to any roof deck this insulation must be a minimum of 60 psi. Extruded Polystyrene insulation is the preferred product. Contact manufacturer for additional information. Roof substrate boards shall be installed in a manner that all edge and end joints are supported by metal deck ribs. Roof substrate boards shall be staggered as recommended by manufacturer. Where required, a suitable vapor barrier membrane shall be installed to the metal deck prior to the installation of the substrate board. Expansion joints should be sealed with expansion joint manufacturers material. Detail expansion joints per manufacturers standard details. Contact Hydro-Gard for additional information concerning expansion joints. 3.03 Installation Primer 1. Apply primer to all concrete surfaces. Allow primer to dry prior to installation of membrane. Primer can be installed using a hand held sprayer and should be applied at an evenly applied rate of 300 to 600 sf per gallon. Surface profiles can differ so adjust application rate based on surface profile. Do not allow primer to pool or become contaminated with dirt or foreign substances. When applied properly surface should be tan and not blackened. Note: membrane will not adhere properly to wet primer. Ensure all primer is dry to the touch.
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