Corrugated roofing sheets of synthetic fiber-reinforced cement, with a rough surface due to the presence of granular material

A method of producing corrugated self supporting roofing sheets which consist essentially of a mixture of cement, inert materials and synthetic fiber reinforcement in mesh form, with a rough top surface of granular material, comprising the steps of:

• preparing a mixture of cement, water and inert materials;
• supporting synthetic fibers in mesh form on a continuously advancing felt or cloth band;
• applying said mixture onto said mesh, forming a layer of suitable thickness which includes said mesh;
• applying a granular material onto the top surface of said layer before the cement has set;
• removing excess water from said layer;
• corrugating said layer;
• cutting said layer, thereby forming corrugated roofing sheets of desired length;
• and
• brushing the top surface of said sheets, after the cement has set, to remove unadhered granules of the granular material.