Division 7 Ebook Page 441 FOAMULAR DURAPINK Insulation, 07 22 16

FOAMULAR Insulation, PRMA, Horizontal Waterproofing B. [Separator Sheet: Flexible glass fiber, nonwoven, non-flammable, corrosion and mildew resistant or other suitable separator (underlayment) sheets shall be used over 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]. C. Protective Mats (for Installation over the Insulation Layer): Filter fabric, non-woven geotextile, made of polypropylene fibers, or other suitable fabric, recommended by its manufacturer for this application in PRMA roofing. 2.1.1.4 BALLAST A. Ballast: 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. 2.1.1.5 PAVER PEDESTALS A. [FOAMULAR 404RB, 604 RB] if needed for installation of concrete paver system B. [Plastic pedestals must be UV stable, resistant to freeze-thaw cycling and designed to align and level concrete pavers.] C. [Provide FOAMULAR [404RB, 604RB] as a top layer over base layers of FOAMULAR described in Section A.] Note to Specifier: Paver pedestals may be preferred over other methods of setting pavers such as into a sand or gravel bed. Pedestals promote drainage and thereby discourage wash out of the setting medium and freeze-thaw degradation of the paver as may occur if the paver is placed directly onto a setting bed. If paver leveling is not required, FOAMULAR 404RB and 604RB are designed to enhance drainage beneath pavers and eliminate the need for a drainage medium. D. [Adjustable paver pedestal system], designed to support anticipated live and dead loads, to control alignment and joint spacing of pavers and to accommodate slope of subsurfaces to create a smooth, uniform, non-slip surface for paver installation. Provide products supplied by and recommended by joint manufacturer's group. 2.1.1.6 DRAINAGE COURSE A. [Pea Gravel or Sand] A three inch layer of sand or pea gravel placed between the structural cast-in-place concrete topping slab and the insulation will promote drainage away from the bottom of the concrete. ROOF BOARD INSULATION 07 22 16 - 5

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