Waterproof coating layer to brush how thick, in order to effectively waterproof?

"The bathroom is waterproof, generally need to brush several times waterproof paint?"
, I am not bad money, waterproof paint please brush a few more times! "
" waterproof paint in the end to brush several times, or just brush it? No matter, brushing thick points is always not wrong! "
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01
is there a requirement for the thickness of the waterproof layer?
02
to ensure the thickness of the coating waterproof layer?
the thickness of the waterproof coating film can be achieved by controlling the amount of material per square meter. But it should be noted that only brush once to reach the specified thickness, waterproof paint can not be applied too thick at once, need to be thin coating many times molding, wait until the previous dry solid and then paint the second time, cross brush. If a molding, too thick will lead to dry paint surface but not dry inside, moisture can not evaporate out, resulting in waterproof layer soft hair thin, a step on the
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03
how to determine that the thickness of waterproof coating film meets the required requirements?
waterproofing project is mainly controlled by construction personnel, the final quality acceptance, but also need professional testing to verify. Common closed water and water test can detect whether the waterproof coating layer is continuous, whether it becomes the whole, can not indicate whether the thickness is up to standard. Waterproof layer thickness also needs to be measured by professional testing equipment, usually by cutting blocks, that is, the waterproof construction site random spot checks and cutting blocks, cutting size is 20mm×20mm, with cursor caliper or thickness gauge for coating layer thickness measurement. Of course, you can also use advanced science and technology non-destructive thickness gauge, on the basis of not breaking the waterproof coating, waterproof coating thickness measurement.
the thickness of the waterproof layer is closely related to the waterproof life, choose the appropriate waterproof paint construction, do not blindly "reduce" or "add" Oh!