Building on the "green bean sand protective layer" in the green bean sand is made of what material, what role?
Commonly used in the surface of linoleum roof
Mung bean sand is a coarse sand or small stone with a particle size of 4 to 6 mm
Two felt three oil or three felt four oil roof finish the last layer of linoleum, to scratch a layer of hot hooves Qi fat, then covered with a layer of clean, dry green bean sand This layer of the role of green bean sand is to block the sunshine asphalt, to delay the anti-overlooking the water to promote the aging of the water layer, and to prevent the asphalt due to overheating and flowing This kind of sand roof is not suitable for the roof If the man's flat roof, linoleum may be set above the overhead insulation board and other protective layer, linoleum should be covered with green bean sand Mung bean sand is not only used for linoleum roof, can also be used for water brush stone, dry stone, chop stone and other decorative plaster
