Division 7 Ebook Page 426 FOAMULAR Insulation, New Roof, Below Membrane, 07 22 16

FOAMULAR , Thermal, Tapered Roof Insulation Note to Specifier: Thermal Barriers are not needed over concrete or wood decks. Thermal Barriers are needed only when THERMAPINK or FOAMULAR insulation is specified over steel deck, the limits of #457 are exceeded, or FM Class I steel deck assembly is needed. Thermal Barrier must be as specified in the building code or classified by assembly testing in accordance with UL 1256 or FM 4450 and shall be placed as prescribed in the assembly listing over steel decks. See www.ul.com "Certifications", or FM Approvals "RoofNav" for alternative thermal barrier materials and complete assembly details. C. [Thermal Barrier Material]: Provide one of the following: 1. Gypsum Board: 1/2" (minimum thickness) 2. Rigid Perlite Board: 1/2" (minimum thickness). D. [Overlayment]: For dark mechanically attached, or any color fully adhered, or chemically incompatible membranes, provide the following: 1. [Glass mat faced gypsum roof board.] 2. [Flexible glass fiber, nonwoven, non-flammable, corrosion and mildew resistant or other suitable separator (overlayment) sheets shall be used under PVC membranes and other such membranes which contain plasticizing agents. Separator sheet shall have been evaluated and approved by the membrane manufacturer for adequacy as a separator.] E. Membrane Fastening or Adhesion System: Per membrane manufacturer's specifications. F. [Ballast]: For loose laid, ballasted system, provide the following: Note to Specifier: Building height, parapet height, and project wind zone are major factors when specifying a minimum ballast requirement. Design ballasted systems in accordance with ANSI/RMA/SPRI RP-4, Wind Design Guide for Ballasted Single-Ply Roofing Systems. 1. [Rounded Water Worn Gravel or Crushed Stone Ballast: ASTM D448, size [#3, #24, #2, #1].] 2. [Concrete Pavers: Provide a compressive strength equal to [___psi] or greater, maximum water absorption rate of [__% by volume], and dimensions, not exceeding 2" x 2' x 2']. Paver weight must be manageable for removal and replacement purposes. Concrete quality must be suitable for weathering conditions to which it will be subjected. a. Paver Weight: Conform to requirements of ANSI/RMA/SPRI RP-4, Wind Design Guide for Ballasted Single-Ply Roofing Systems. PART 3 - EXECUTION EXAMINATION A. Examine the areas and conditions under which work of this section will be installed. Verify that adjacent materials are dry and ready to receive insulation. 1. Verify that the roof deck drains completely free of water within 48 hours following rainfall. 2. Verify that the dead load carrying capability of the deck is sufficient to support code mandated live loads and dead loads incident on the roof, including the entire roof covering/insulation system. 3. Verify that the roof deck provides adequate support for the insulation. B. Provide written report listing conditions detrimental to performance of work in this section. Do not proceed with installation until unsatisfactory conditions have been corrected. ROOF DECK PREPARATION A. [Any deteriorated roof decking shall be repaired or replaced.] ROOF BOARD INSULATION 07 22 16 - 4

Previous Page
Next Page