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Not necessarily. An excessive amount of granules are applied during the shingle manufacturing process to make sure that the bitumen on the roofing sheet is completely covered. It is important to completely cover the sheet with granules so that the bitumen is not exposed to ultraviolet light. In accordance to the EN 544 the value of the loss of granules may not exceed 2,5 g (test procedure EN 12039). But IKO does better than that. IKO’s own maximum limited value is 1,2 g!