Bitumen is a natural and ecologically clean water-repellent material. Bitumen adapts to strructural movement, enabling the roofing shingles to fully retain its properties and integrity despite roof movements and temperature variations. Roofing shingles are also lightweight and therfore place no additional load on the roof structure. The shingle material is long-lasting and extends the lllife of the entire roof strructure.Kerabit roofing shingles are manufactured in compliance with the EN 544 quality standard using modeeern equipment and hiigh-quality European and Scandinavian raw materials. All Kerabit products are made of modified SBS bitumen which gives them the superior durability and flexibility.