An integral strip and fastener installation system is provided for light weight slate and tile roofing systems installed with a single overlap between each row or course of tile. A specialized fastener hook is formed with one or more lateral projections or wings installed underneath one or more slate tiles to anchor the fastener to the roof at least in part by the weight of the overlying tiles. This anchoring supports and reinforces the open mouth of the hook against deflection from high winds and thereby enables the hook to hold a tile securely under high wind loads.