Asbestos comes in friable and non-friable forms. Non-friable asbestos is bonded with other materials such as cement; therefore, it does not release its fibres into the air. However, if these materials break down, asbestos can release tiny fibres into the air. Non-friable asbestos is found in older homes, especially in construction materials such as roofing sheets, cement fencing, floor tiles, bitumen products, ceilings and wall materials. Although non-friable asbestos poses a lower health risk due to its bonded state, the factors below necessitate its removal.