the present invention also has significantly improved flame retardant capabilities in the preferred embodiment the resulting laminate composition 10 has zero 0 flame spread and smoke development when tested according to the class a astm e 84 fire retardant treated wood specification however flame spread and smoke development values greater than zero 0 are permitted to the extent that the laminate composition falls within the class a astm e 84 fire retardant treated wood range designations table 2 illustrates selected properties of a preferred embodiment of a laminated plywood composition 10 the laminated composition 10 of this embodiment meets the class a astm e 84 standard as illustrated in table 3 and therefore has excellent fire performance properties in another embodiment the laminate composite material 10 products for end use may include structural laps to improve performance and simplify installation as illustrated in fig3 fig3 illustrates a laminate composite material sheet 10 having an mgo lap 50 and a building material lap 60 the mgo lap 50 is more weather resistant and helps to protect the building material lap 60 of the previous layer the mgo lap 50 also hides and protects the fasteners which may be applied only on the.