Abstract: A simulated clay tile roof construction is provided which includes a plurality of roof panel members which are each formed to simulate the appearance of a plurality of clay roof tiles. To minimize the weight and ease the assembly of the roof panel members, they are provided with cut-out sections at diagonally opposite corners. To optimize the strength and minimize the weight and cost of the panel members, they are constructed by molding with an upward facing weather resistant gellayer over the entire surface, with an underlayer of fiberglass reinforced gypsum over a majority of the surface thereover, and with a high strength underlayer of fiberglass reinforced plastic along the lateral edges thereof. A method of making the roof panel members is also proposed, including applying the fiberglass for the gypsum layer while the underlayer is still wet, applying the gypsum to the fiberglass layer, and then rolling the layers to mechanically bond the same together.