| When paving, the bottom membrane is required to be lapped at the joint, and the width is not less than 20 cm.Draw attention: at present there are two phenomena in the market, some merchants buy very cheap plastic film in China to save the cost, not only the thickness is not guaranteed, but also does not have the anti-alkali energy,
Some businesses use the bottom membrane and the mat composite material to save the paving time, but the bottom membrane at the joint can not be connected to each... helm.f-rpg.me — 2017-07-29 12:15 |