Division 7 Ebook Page 443 FOAMULAR DURAPINK Insulation, 07 22 16

FOAMULAR Insulation, PRMA, Horizontal Waterproofing 3.1.1.4 WATERPROOFING MEMBRANE A. Complete substrate construction, including work which will penetrate waterproofing, before start of waterproofing application. B. Comply with manufacturer's recommendations regarding condition of the substrate to receive waterproofing/paving system, weather conditions before and during installation, and protection of the installed waterproofing/insulation, ballast system. C. Begin waterproofing membrane installation at the low point of the roofing project area such that the direction of water flow is not against any laps. D. The membrane shall be installed to fit neatly around penetrations and roof projections without the formation of "backwater laps." E. The waterproofing membrane surface to be insulated shall be inspected [by the Architect, the waterproofing manufacturer's representative, or other designee] for satisfactory completion before applying FOAMULAR. This inspection is necessary to insure that all splices, field seams and any lap/seam treatment have been completed, that all flashing has been installed, and that all membrane terminations have been completed before being covered and becoming relatively inaccessible. F. The membrane surface over which the PRMA insulation is to be applied shall be free of debris and relatively even. G. Install layer of protection sheet over membrane as soon as practicable after membrane installation to avoid damage to membrane from sunlight and subsequent operations. H. [Flood test complete membrane before placement of protection sheet, insulation, or paving. Plug or dam drains and fill area with water to a depth of 2 inches or to within 1/2 inch of top of flashings; let stand for 24 hours. If leaks are discovered, repair and retest until no leaks are observed.] Before specifying, verify that structural system is capable of withstanding the load of a flood test. 3.1.1.5 VAPOR RETARDER A. Install a vapor retarder in accordance with construction drawings. Place the vapor retarder to insure adequate end and side joint laps. The roofing/waterproofing membrane, present on the warm side of the insulation in a PRMA system functions as a vapor retarder. The thermal resistance above the membrane and the thermal resistance below the membrane must be balanced to discourage condensation on the underside of the membrane. When environmental conditions create a condensation point within the insulation board under the membrane, it may be necessary to install a vapor retarder between the layer of below membrane insulation and the roof deck. FOAMULAR insulation is compatible with most commonly used asphaltic and sheet film vapor retarding materials. See the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) Handbook of Fundamentals for specific design guidelines. 3.1.1.6 INSULATION A. Total waterproofing insulation aged thermal resistance shall be [R___], achieved in the thicknesses and number of layers as shown in the construction documents. R value chosen is to be specified based on the intended use of each project and design criteria of each project, and applicable energy conservation codes. ROOF BOARD INSULATION 07 22 16 - 7

Previous Page
Next Page