Penurunan Radiasi Panas Penutup Atap Dengan Bahan Pelapis Alami (Study On The Decrease Of Roof Radiation By Natural Material Layer)

ABSTRAK The increase of space temperature mostly caused by roofs. Roof material made of concrete may deliver heat up to 53°C during the day, higher than air temperature which is 33 °C. The effort of decreasing temperature through giving layer with slant platform only reduces the heat about 8 °C. Using layer material made of wooden sawdust and straw, the temperature on the lower surface can be decreased up to 10 °C. The layer thickness between 3 cm till 7 cm does not show the real decrease of roof radiation , which is about 2 °C. Woodensawdust and straw do not make distinct decrease, i.e about 1° Keywords: Radiasi panas, bahan pelapis alam