I've visited cameron highlands for 2 weeks in a row. I recognised the plantation roofings are indeed very simple but yet very thoughtfull. I saw this kind of roof introduced by Jabatan Pertanian or the Department of Agriculture.. in Banting, Selangor.
Almost every plot in Cameron highlands is using this roof. Yes I , I agree that there is so much advantage with this method. Lower the cost in operation abd increase the supply. I wish to build my own with a smaller scale. Due to the fact that the materials are easy to get. Well.......wait and see ^_^