A roof tile containing fibers which satisfy the following requirements (1) to (3): (1) to have an average fiber diameter of 50 μm or less; (2) to have an aspect ratio of 50 to 2000; and (3) to have three or less buckled portions per fiber.

A roof tile containing fibers which satisfy the following requirements (1) to (3): (1) to have an average fiber diameter of 50 μm or less; (2) to have an aspect ratio of 50 to 2000; and (3) to have three or less buckled portions per fiber.

A novel heat shielding material made of an inorganic material is proposed.

A heat shielding material made of an inorganic material, including: a base material; a underlayer layered on the base material; and a top layer layered on the underlayer, wherein the top layer has a thickness such that the underlayer is not visually recognizable, and transmits infrared rays, and the underlayer includes a commingled between a material of the underlayer and a material of the top layer, and a main reflection region where the material of the top layer is not present.

By a suitable combination of the top layer and the underlayer, a high solar reflectance (TSR) exceeding 30% can be obtained even at an L* of 40 or less.

A roof tile comprising a decorative layer, having at least a ceramic body, and a support layer disposed below the decorative layer, wherein the roof tile comprises an upper edge, a lower edge which is opposite to the upper edge and two opposite side edges, said side edges being transversal to the upper edge, wherein said roof tile comprises at least one anchoring element for anchoring the roof tile to a structure or framework.

A roof tile comprising a decorative layer, having at least a ceramic body, and a support layer disposed below the decorative layer, wherein the roof tile comprises an upper edge, a lower edge which is opposite to the upper edge and two opposite side edges, said side edges being transversal to the upper edge, wherein said roof tile comprises at least one anchoring element for anchoring the roof tile to a structure or framework.

A roof tile comprising a decorative layer, having at least a ceramic body, and a support layer disposed below the decorative layer, wherein the roof tile comprises an upper edge, a lower edge which is opposite to the upper edge and two opposite side edges, said side edges being transversal to the upper edge, wherein said roof tile comprises at least one anchoring element for anchoring the roof tile to a structure or framework.

A roof tile comprising a decorative layer, having at least a ceramic body, and a support layer disposed below the decorative layer, wherein the roof tile comprises an upper edge, a lower edge which is opposite to the upper edge and two opposite side edges, said side edges being transversal to the upper edge, wherein said roof tile comprises at least one anchoring element for anchoring the roof tile to a structure or framework.

A roofing tile composed of concrete material and a method for producing such a roofing tile. The concrete material contains a binder, a gravel, a light-weight aggregate, and added water. The roofing tile has at least one watercourse and a lateral interlocking joint having a covering fold and a water fold. The ratio of water to binder is less than 0.3, the light-weight aggregate is composed of a material that is hydrophobic and/or not hygroscopic, and the roofing tile has a density in the range of 1.6 g/cm.sup.3 to 1.9 g/cm.sup.3 after the hardening. The roofing tile has a thickness of 5 mm to 9 mm, preferably 7 mm to 8 mm, in the highly loaded regions, preferably in the region of the watercourse.

A roofing tile composed of concrete material and a method for producing such a roofing tile. The concrete material contains a binder, a gravel, a light-weight aggregate, and added water. The roofing tile has at least one watercourse and a lateral interlocking joint having a covering fold and a water fold. The ratio of water to binder is less than 0.3, the light-weight aggregate is composed of a material that is hydrophobic and/or not hygroscopic, and the roofing tile has a density in the range of 1.6 g/cm.sup.3 to 1.9 g/cm.sup.3 after the hardening. The roofing tile has a thickness of 5 mm to 9 mm, preferably 7 mm to 8 mm, in the highly loaded regions, preferably in the region of the watercourse.

The invention relates to ceramic granules with a high UV opacity and high solar reflectance, which is produced by forming a calcined clay mineral powder into green body and re-calcining, featured with a water absorption of 15-35%; ≥97% crystalline content and 90-100% UV opacity. The invention further relates to a method for preparing ceramic granules with a high UV opacity and high solar reflectance and the use thereof for reflectance-improving application on building surface for the purpose of energy conservation.