Polyurethane molded roofing structures

Abstract

The invention describes a structure including a first layer, a third layer and a second layer including a low side and a high side. The first layer comprises a low density polyurethane, the second layer comprises fiberglass and the third layer comprises a high density polyurethane. The first layer is reaction injection molded upon the low side and the third layer is reaction injection molded upon the high side.

1 . A structure comprising: 
 A first layer;    A second layer including a low side and a high side;    A third layer, wherein the first layer comprises a low density polyurethane, the second layer comprises fiberglass and the third layer comprises a high density polyurethane, and wherein the first layer is reaction injection molded upon the low side and the third layer is reaction injection molded upon the high side.    
   
   
       2 . The structure of  claim 1  further comprising at least one reception area configured to receive a support beam.  
   
   
       3 . The structure of  claim 2  wherein the reception area is formed in the third layer.  
   
   
       4 . The structure of  claim 1  further comprising at least one ventilation point.  
   
   
       5 . The structure of  claim 4  wherein the ventilation point further comprises a screen.  
   
   
       6 . The structure of  claim 4  wherein the ventilation point comprises a gap contiguously formed in the first layer, second layer and third layers.  
   
   
       7 . The roofing structure of  claim 1  wherein an outer surface is molded to a predetermined shape.  
   
   
       8 . The roofing structure of  claim 7  wherein the external surface is a surface of the first layer opposite the second layer.  
   
   
       9 . A method of manufacturing a structural element, the method comprising: 
 Providing a second layer comprising fiberglass;    Reaction Injection Molding a first layer to the second layer, the first layer comprising a low density polyurethane;    Reaction Injection Molding a third layer to the second layer, the third layer comprising a high density polyurethane.    
   
   
       10 . The method of  claim 9  further comprising: 
 Forming a reception area configured to receive a support beam.