Alang-alang thatching has been used for hundreds of years on the island of Bali as a traditional form of roofing. Alang-alang is made from the grass Imperata Cylindrica and is called alang in Bahasa Indonesia and Malay.
Alang-alang is still made in the same traditional way and are often constructed using bamboo rafters, although nowadays timber is becoming more common - although more expensive. The peak of the roof is usually finished with decorative terracotta "crown." The eaves can then either be cut horizontally to form a straight fringe, or left uncut with the grass drooping Tahitian style.
Alang-alang is a good insulation against heat and is extremely attractive to look at, both from the inside and outside. It is also very durable, in some cases lasting for up to twenty years although the usual life-span is around six to eight years.
Many factors affect the life span of alang-alang, which is a natural organic material and under a constant process of decomposition. Factors include the quality for the material, the pitch of the roof and whether there is water from an upper roof falling on it.
Alang-alang roofs require no finishing or maintenance however a spraying with varnish on the inside will enhance their appearance. |