Patent ID: 7779600

Claim:
A method of constructing a portion of a building roof formed from a composite material, the composite material being formed from a selected plastic foam coated on at least one surface with a fiber reinforced coating, the roof having a surface interior to and a surface exterior to the building, the method comprising the following steps, the roof being constructed from beams, each beam having top and bottom flanges and a web therebetween, the flanges having top and bottom surfaces and the web having opposing surfaces, the flanges and the web having opposing edge surfaces, coating the bottom surface of the top flange, the top surface of the bottom flange and the opposing surfaces of the web of the beam with a fiber reinforced coating, joining the beams together at abutting uncoated edge surfaces of the flanges and the web to form a portion of the roof and coating the roof surface interior to and exterior to the building roof formed from the joined beams with a fiber reinforced coating.