The thickness of the coating waterproof layer is related to the service life of waterproofing

China Paint Online News Information
The current leakage rate of buildings remains high, the reason is that some of it comes down to construction, some to materials. Construction is crude, materials are fake and inferior, in addition, we often say that the theft of materials, "stealing work" is to do not do, the treatment of not to deal with, from the cost also save labor costs, "reduced material" is the quality of qualified materials too much savings, not willing to use, refused to use, d'eminently reduce the use of materials and reduce costs.
Today we take the topic of "reducing material" to expand, we all know that the more the number of waterproof paint brush, the thicker the thickness of the coating film, that is, the more each square meter of material, so as to ensure the quality of waterproof. And the actual project to consider whether waterproofing is done well, whether durability is only through a means to determine, that is, "closed water" acceptance, waterproof layer construction is completed, the plane for 24h closed water, facade for 30min non-stop water, the back does not leak on the water to show that our waterproofing is no problem, you can hand over work. This is a completely wrong judgment, so that it can show that waterproofing can be used for five years, ten years, twenty years or even the same life as the structure? Completely can not explain, I asked, waterproof coating film only brush thin once, even 0.1mm can not reach, but waterproof coating layer is continuous, when you close the water, will leak? The answer is no leakage. But how long will such a waterproof layer last? Needless to say to resist the later structural deformation, in the process of doing cement mortar rigid protection or other decorative process will be destroyed, how to talk about durability, how to talk about waterproofing, how to talk about service life.
Why is the thickness and service life related, if not off, waterproof grade is not related to how thick waterproof layer, such as toilet first waterproof (20 years service life), the selection of polymer waterproof coating film is not less than 2.0mm, secondary waterproof (10 years service life), the selection of polymer waterproof coating film is not less than 1.5mm. Technical specifications aside, waterproof layer in the waterproof function will be fatigue consumption, coating waterproof layer more dense and thicker its fatigue-resistant stretch longer.
the purpose of the waterproof layer is that when cracks appear in the structure, they are not widened by cracks and cracked, to maintain continuity to play the function of impermeable water. If figure 1 waterproof coating film thickness d is 2.0mm, when the structure deformation cracks, its thickness stretch becomes 1.0mm, if the original thickness is only 0.3mm, the structure deformation cracking, the coating film will become thinner or even broken, it will not play a waterproof role.
Waterproof construction, how do we ensure the thickness of the coating film waterproof layer, you can control the amount of each square meter of material, but not to say that the amount of material to do, that thickness is done, but the quality of the finished product is not off, the coating film to be thinly coated many times, 1.5mm thickness also needs three to four times the construction forming, so that the finished film is dense.
waterproofing process is controlled by the construction staff, the final quality acceptance, or through professional measurement to witness. That is, the waterproof construction of the part of the cutting block measurement thickness, plane and facade each random spot check, cutting size is 20mm×20mm, with cursor caliper or thickness gauge for coating layer thickness measurement.
Through closed water and water acceptance can explain whether our waterproof coating layer continuous cross-circle, whether to become a whole, only through thickness measurement can explain what grade our waterproof layer can achieve, how long can be used. It can be said that the more the waterproof coating layer to do the better, do the thicker the better, but, from the cost-effective aspect, do too thick time- and labor-free, labor-free, une economical, so that the specification requires thickness, can to the expected waterproof effect of the best. JGJ298-2013 of the Residential Indoor Waterproofing Technical Specification stipulates that when waterproof coatings are used in indoor waterproofing projects, the thickness of the coating waterproof layer should be horizontal ≥1.5mm, vertical ≥1.2mm.
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