These tiles are provided with suitable dimensions so that they can be joined together. These tiles are of flat pattern but special Mangalore pattern tiles are available for hip, valley and ridge sections. The life expectancy of these tiles is approximately 25 years. These are red in color and it is found that 15 Mangalore tiles are required to cover 1 m2 of roof area.
These are the most commonly used roof tiles in Kerala. The length of the tiles is 32 to 35 cm and the width is 21 to 23 cm. The maximum percentage of water absorption is 20 and the minimum average breaking load is 1.00 kN. More than 40 percent of tiles are broken due to wrapping. The number of cracks can be reduced by adding a small amount of aluminum chloride to the soil.
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