Division 7 Ebook Page 421 OptiLiner Banded Liner System, 07 21 16

FOAMULAR , Thermal, New Roof, Below Membrane F. [For ballasted roofing systems (including PRMA*) with no cover board over the XPS,] black/dark (non- white) roofing membranes (or filtration fabrics in PRMA) over THERMAPINK and FOAMULAR insulation shall be ballasted immediately after placement to prevent potential heat damage from sun exposure and wind displacement of the insulation under the membrane/fabric. G. [For mechanically attached and fully adhered roofing systems,] in areas where black/dark membranes are used and where "reflected solar energy" is expected to be present, THERMAPINK and FOAMULAR need protection in addition to normally specified cover boards. For example, roof areas adjacent to higher walls, particularly walls with reflective surfaces, or near large rooftop HVAC units, or near or in between clusters of mechanical equipment, or near other structures with reflective cladding (metal or glass); or near higher reflective parapets, all such areas should be considered for additional heat protection. Such roof areas must be covered with pavers or ballast. Black/dark (non-white) membranes must be coated with white reflective topping, and maintained white, to avoid damage due to the intensified heat exposure from reflected sun in such areas. H. Insulation shall be [loosely placed, secured] in accordance with the membrane manufacturers requirements. The insulation below the membrane is to be held in place with [ballast, compatible adhesives, mechanical fasteners in conjunction with the overlayment and/or membrane system]. [Mechanical fasteners shall be of sufficient number and adequate pattern to resist displacement of insulation by wind uplift forces.] When adhering or exposing THERMAPINK or FOAMULAR to hot bitumen, the bitumen must be allowed to cool to between 200 and 250 F. OVERLAYMENT A. Only dry overlayment materials shall be used. If overlayment materials become wet, allow them to fully dry before proceeding with roofing application. Requirements for overlayment materials and thickness may vary. Contact membrane manufacturer for their individual requirements. B. [Rigid overlayment shall be [mechanically attached, adhered with a suitable adhesive] per manufacturer's recommendations.] 1. Mechanical fastening of insulation and rigid overlayment may coincide so that fastener penetrates overlayment and THERMAPINK or FOAMULAR into the structural substrate the minimum distance prescribed for adequate wind uplift resistance by the fastener manufacturer. 2. [Loose lay flexible sheet overlayment over [THERMAPINK, FOAMULAR] and cover with a membrane attached per the manufacturer's recommendations. Edges and ends of rolls shall be lapped a minimum of 6".] C. When cleaning agents and seam adhesives used are solvent based and capable of causing cavitations of the underlying [THERMAPINK, FOAMULAR] insulation, use care when preparing membrane edges for in-field seam splicing. BALLAST Note to Specifier: Before selecting this roofing system, determine that the ballast system designed will not exceed the dead load limits of the structure. A. Ballasting Requirements: 1. Weight of ballast installed must be sufficient to provide protection against wind uplift pressure. The necessary weight per square foot, gradation and application surface areas shall be determined in accordance with ANSI/SPRI RP-4, Wind Design Guide for Ballasted Single-Ply Roofing Systems. 2. Ballast gradation and quantity installed (i.e., depth) must be adequate to completely cover the membrane. Insulation thickness does not affect the amount of ballast required. 3. Protect membrane and place ballast in accordance with membrane manufacturer's instructions. ROOF BOARD INSULATION 07 22 16 - 6

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