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09/19/02 THU 10:25 FAX 7634796691 ER SYSTEMS 003 FACTORY MUTUAL ,L Factory Mutual Research 1151 Boston-Providence Turnpike P.O.Box 9102 Norwood, MA 02062 J.I. OB6A5.AM September 16, 1999 (4470) ERAGUARD ROOF COATINGS FOR USE OVER POLYURETHANE SPRAY FOAM AND METAL PANEL ROOFS FROM ERSYSTEMS 50 MEDINA STREET LORETTO, MN 55357 1 INTRODUCTION 1.1 ERSystems submitted their Eraguard roof coatings for testing to determine If they would meet the Approval requirements of Factory Mutual Research Standard 4470 (1986) for Class 1 Fire, Windstorm and Hail Classifications for use in recover construction with polyurethane spray foam insulation applied over steel, wood and concrete deck roofs, insulated metal panel roofs and in new construction over structural concrete roof decks. 1.2 Examination included ASTM E108 (93) fin:testing for potential exterior fire spread, simulated hail damage testing, water leakage testing and resistance to foot traffic testing. Other tests with the foam insulations were completed under J.I. 0Z3Q4.AM. 1.3 Test results show that the Eraguard coatings submitted for testing meet the Factory Mutual Research Standard 4470 Approval requirements for Class 1 Roof Covers when installed as described in the CONCLUSIONS of this report. II MATERIALS TESTED 2.1 Eraguard 1000 FR, Gray is a gray acrylic, water based roof coating spray or roller applied to sprayed rigid polyurethane foam roof insulation. Eraguard 1000 FR, Gray is applied as a base coat at a minimum rate of 1.5 gal/square (0.6 f/mz)with a minimum 12.5 mil [0.0125 in. (0.3 mm)) dry thickness. Eraguard 1000 FR, White is applied after a 12 to 24 hour initial cure at a minimum rate of 1.5 gal/square (0.6 f/m2) with a minimum 12.5 mil [0.0125 in. (0.3 mm)] dry thickness. 2.2 Eraguard 1000 FR, White is a white acrylic, water based roof coating. It is spray or roller applied to Eraguard 1000 FR, Gray base coat at a minimum rate of 1.5 gal/square (0.6 9/m2) with a minimum 12.5 mil [0.0125 in. (0.3 mm)] dry thickness or it is applied to Eraguard 2000- Primer- FR in a two coat application with each coating applied at a minimum rate of 0.75 gal/square (0.3 9/m2)with a minimum 12.5 mll [0.0125 in. (0.3 mm)] dry thickness. The use of No. 11 roofing granules is optional over polyurethane foam and requires that a third coat of Eraguard 1000 FR, White be applied at a rate of 0.5 gal/square(0.2 P/m2)with granules broadcast into the wet coating at a rate of 40 Ib/square (1.9 kg/m2).