Answer:<\/p>\n\n\n\n
In Japan, there is a so-called breather buffer method\u2014the insulation-based polyurethane PU method (see \u201cWaterproofing Construction Methods\u201d in the book, p. 123 and p. 126)\u2014or the degassing method of modified asphalt waterproofing felt or high-strength PVC sheets. This method should pay attention to the following points: <\/p>\n\n\n\n
(1) Before fully installing the waterproof material, you should pay attention to its flatness; if thermal insulation tiles or tiles are used, it is best to remove them first and then apply a primer coat. <\/p>\n\n\n\n
(2) It is best to keep the moisture inside the covering layer to a minimum (do not install the roof until it has been exposed to the sun for at least 7 days).<\/p>\n\n\n\n
(3) All surface cracks should be first repaired using an insulating method (see question 14).<\/p>\n\n\n\n
(4) It is best to partially excavate around the water-filled area and the 30\u201350-centimeter-wide area where the water level is high, then apply a section of the water diversion channel; once the waterproofing layer is completed, a drainage ditch will naturally form.<\/p>\n\n\n\n
(5) When applying adhesive reinforcement, the material must be compacted and tightly adhered; no wrinkles or protrusions should be present (the overlap width must be 50mm or more). <\/p>\n\n\n\n
(6) The installation of the ventilation buffer sheet or de-pressurization tube should be carried out carefully according to the steps specified in the material supplier's instructions (Generally speaking, a de-pressurization tube is required for a surface area of up to 50\u33a1). <\/p>\n\n\n\n
In fact, there are many cases of failure in domestic construction projects. Basically, this is a very risky construction method (the reason is that the waterproof layer is not directly attached to the structure; there are too many unpredictable factors, such as earthquakes, typhoons, fires, etc. If a single part of the surface of the waterproof layer is damaged, it is equivalent to not having waterproof protection). Therefore, readers are advised to carefully plan if they want to adopt this method; it is best to find an experienced waterproof professional construction contractor, and it is best for the original manufacturer to provide comprehensive warranty; this will provide protection for consumers and the construction workers.<\/p>","protected":false},"excerpt":{"rendered":"
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