These roof shingles are used in low income houses as well as farm houses. They have a huge advantage over corrugated asbestos or aluminium roof shingles. The Tetra Pak roof shingles do not transfer noise when it rains, avoiding disturbance and presents heart attacks for farm animals. Furthermore, the green shingles are superbly waterproof, inflammable, and unbreakable 17 and have a heat transfer of 30% lower than shingles made from asbestos cement. They are 50% lighter saving on construction and are 30% cheaper than the existing alternatives.