One Hundred Questions on Waterproofing Catalogue
(One Hundred Questions on Waterproofing) #100: Currently, there are a growing number of cases on the market offering a "10-year warranty for waterproofness". Will this increase the burden on builders and developers significantly?
Answer: Actually, no! Because the cost of waterproofing work only accounts for 1% of the overall construction cost! Taking into account the current selling price of mainstream floor area in Taipei City – 40 square meters, the average selling price is as high as 4 […]
(One Hundred Questions About Waterproofing) Why are the basement levels of apartment buildings constantly leaking, despite the #98fact that there are only elevator shafts and mechanical parking spaces? How can they be completely repaired?
A: (i) Currently, all multi-story residential buildings in China have a foundation-based rainwater collection system; therefore, if there is severe leakage anywhere in the basement, it can be used to drain the water.
(One Hundred Questions on Waterproofing) Part #97 covers the design of double walls in basements, which may affect the usable floor area of the basement. The water-conducting wall method was developed in response to this need. What material is it made of? What are the standard construction specifications?
A: To achieve the dual function of drainage for the basement walls while not affecting the space for flat parking, water-conducting panels and diamond-shaped meshes are laid on the walls, and the surface is then painted and painted. This is […]
(One Hundred Questions on Waterproofing) In a #96-story underground building, there are double-wall designs for the basement walls; the drainage is smooth. Where can water still seep through? How can it be prevented?
Answer: (i) The leakage type can be divided into (ii) Prevention methods:
(One Hundred Questions on Waterproofing) In underground basements of #95domestic buildings, there is often a phenomenon of inexhaustible seepage and continuous water leakage. Is there an advanced waterproof material or construction method that can achieve a permanent waterproof function?
Answer: (i) Waterproofing of continuous walls has significant differences in basic design and construction concepts, both domestically and internationally. In foreign countries, continuous walls are defined as the hypothetical construction of retaining walls, […]
(One Hundred Questions on Waterproofing) #94 Continuous Wall Waterproofing Uses an Internal Waterproofing Layer; What Are the Construction Standards and Norms?
Answer:
(One Hundred Questions on Waterproofing) #93Underground waterproofing can be divided into external waterproofing (external construction) and internal waterproofing (internal construction). What are the different types of external waterproofing methods? What are the standard construction specifications?
Answer: It can be divided into: Standard normative construction drawings for the outer waterproof layer construction method: Standard normative construction drawings for the outer waterproof layer construction method:
(One Hundred Questions About Waterproofing) What parts of the #92 basement are most prone to water leakage?
Answer:
(One hundred questions on waterproofing) #91Coming to the topic, can colored PU or EPOXY series materials be used to waterproof the brick-built flowerbed?
Answer: Not advisable. Because
(One Hundred Questions on Waterproofing)#90 What kind of waterproof material should be used for flower beds constructed with bricks for roofing, terraces, and courtyards? What are the key aspects to consider in terms of design?
A: It is advisable to use water-based and solid-state waterproofing coating materials. In planning the construction, the following points should be taken into consideration:
(One Hundred Questions on Waterproofing) Which types of construction methods are suitable for waterproof flower stands with the #89RC structure?
Answer:
(One Hundred Questions on Waterproofing) Which parts of the #88 Flower Stand are most prone to leakage? What are the situations where waterproof performance of the Flower Stand is particularly likely to fail?
Answer: (i) The most common areas prone to water leakage in flower beds are: (1) the corners of the installation process during the root formation or the gradual grouting process; (2) around the water outlet. (ii) […]
(One hundred questions on waterproofing) If a water leak occurs in an #87-tank pool, if an internal waterproofing renovation is carried out, would the process be too long and the project too extensive? Is it possible to fix the leak externally and get it done once and for all?
A: If you want to prevent future problems from occurring by performing a leak repair from the outside, there are only two situations where the success rate is higher: As for the leakage caused by the construction seam at the corner, which occurs most often, because it is applied during the construction process, the success rate is higher than 90%.
(One Hundred Questions on Waterproofing) The ceiling of the #86th-floor elevator room has experienced a leak phenomenon; given that it is above a water tank, what are the key aspects of the concept that should be considered when repairing the leak?
A: Generally, if the ceiling of the elevator room in the top floor of a residential building experiences a water leak, because the water storage tank is located above it, the first thought is that it is likely caused by a water tank leak […]
(One Hundred Questions on Waterproofing) Which series of waterproof materials should be used for the water storage tank in a #85new construction site? What are the standard construction specifications?
Answer: According to the waterproofing standards of the Japan National Association of Architects JASS No. 8, it is recommended to use water-based and solid-state waterproofing materials (categorized into acrylic resin-based and epoxy resin-based).
(One hundred questions on waterproofing) What is the most common mistake in the construction process when waterproofing a #84new construction site pond? Is it suitable to use PU, EPOXY or FRP construction?
Answer: (i) In the process of waterproofing the tank, the most common mistake on construction sites is to first paint the base and then apply the waterproofing coating. The reason is that the tank itself is usually made of […]
(One Hundred Questions on Waterproofing) #83: In some cases, the waterproof coating is only applied by brushing with seven-millimeter quartz powder or by buying some waterproof agent at a hardware store; there is no leakage phenomenon. On the other hand, some construction sites use expensive imported materials from Europe and the United States, but they often leak, and repeated repairs are ineffective. Why is that?
Answer: The key lies in the structure of the tank; as question 83 indicates, 90 percent of the water leakage is due to four major defects in the structure; if these defects are addressed beforehand, it’s fine.
(One Hundred Questions on Waterproofing) #82: What parts of ordinary storage tanks are prone to leakage? What are the two main methods for constructing the tank structure? Which method is less likely to cause leakage?
Answer: (i) The common areas prone to water leakage in water storage tanks are: (ii) They are constructed using U-shaped and M-shaped structural methods. The U-shaped method is preferred because the large base and wall of the tank are designed to be connected to the ground.
(One Hundred Questions on Waterproofing) #81: How does waterproofing in bathrooms and toilets in newly constructed construction sites work? If (a) polyurethane (PU) is used, what is its functional performance? After construction, there is often a phenomenon of residual adhesion (not fully cured); how can this be prevented? (b) Rubberized asphalt (RA) is used; what are its advantages and disadvantages? (One Hundred Questions on Waterproofing) #81
Answer: (i) If PU construction is adopted, the waterproof function of the RC wall is still possible; the only drawback is that the surface cannot be painted or primed; however, for the brickwork part, the surface cannot be painted or primed.
(One hundred questions on waterproofing) #79: How should the bathrooms and toilets in newly built construction sites be waterproofed? Which series of waterproof materials is best? Are there any blind spots that need special reinforcement?
Answer: (i) According to the waterproofing standards of JASS 8 of the Japan National Association of Architects, it is recommended to use a water-based and solid-state composite waterproofing material (that is, the type commonly used in public buildings).
(One Hundred Questions About Waterproofing) #78 Waterproofing for Bathrooms: How should the choice of materials prioritize specific features and functions?
Answer: (1) Next comes the functionality — since the bathroom walls are difficult to completely dry, it is best to use water-based waterproofing materials. (2) Weather resistance — since the bathroom is exposed to the elements, it is important to choose a waterproof material that is resistant to moisture.
(One hundred questions about waterproofing) There is often a white coating (wall cancer) on the wall #77near the bathroom. Why does it form? If construction is not carried out from within the bathroom, what are the feasibility issues if construction is carried out from the outside wall?
Answer: (i) The water vapor in the bathroom is heavy, while the water vapor outside the bathroom is light. The water vapor in the bathroom is acidic because it combines with the carbon dioxide and carbon monoxide in the air to form acid water […]
(One Hundred Questions on Waterproofing): What are the common types of #76bathroom leaks?
Answer: (i) Longitudinal leakage (water leaking from the upper floor to the lower floor): (1) Water leakage from the lower floor due to cracks in the bathroom floor or defects in the floor structure. (2) […]
(One Hundred Questions About Waterproofing) After the introduction of the #75-thread method for injecting PU foam, what is the reliability of the leak repair using this commonly used method? How reliable is the use of transparent water-repellent agent to repair window frames?
Answer: (i) Although this method of construction has the advantages of being quick and low-polluting, it also has the following blind spots in terms of actual results: (1) The construction workers must have a thorough understanding of the techniques involved; (2) The quality of the finished product is not guaranteed; (3) The cost of the construction is higher than that of traditional construction methods.
(One Hundred Questions on Waterproofing) After the #74new construction site is handed over, due to poor installation of the window frames, what are the various repair methods for fixing the leakage?
A: The phenomenon of water leakage caused by poor installation of window frames is the number one problem in the after-sales service departments of major construction companies in China. Their repair frequency is the highest. They are dedicated to fixing the problem by repairing the leak […]
(One Hundred Questions on Waterproofing) #73: Is it possible to waterproof new construction window frames using water-based acrylic waterproofing paint? If there is sufficient budget for high-end luxury homes, what is the most durable and best waterproofing method?
Answer: (i) Using water-based vulcanized asphalt paint to waterproof window frames: based on experience, this black waterproof adhesive (which is also called “water-based PU” on the market, but in fact is a water-based adhesive) has a good waterproof effect.
(One Hundred Questions on Waterproofing) Question #72: Can the gaps in doorways and windows that are too large be filled with quick-drying, quick-setting cement mortar sold by general building materials stores for construction? What are the potential side effects?
A: Currently, the emergency grout sold by building materials stores is mainly used for basement leak detection projects. If it is used to fill large gaps in door and window frames, the following side effects will occur: […]
(One Hundred Questions on Waterproofing) #71: Since the design or layout changes have caused the gaps between the window frames to be too large, is it possible to first fill them with red bricks? What are the key points to consider regarding the waterproofing?
A: This is a common situation in construction sites. Many site managers lack basic knowledge of waterproofing, which is one of the main reasons why water seeps from the walls near the window frames and causes paint to peel off. […]
(One Hundred Questions on Waterproofing) #70Generally, new construction sites will install waterproofed groove for windows and doors. However, contractors are strictly required to apply waterproof agent during construction. Why is there still a frequent occurrence of water leakage? How can it be prevented?
Answer: (i) The author believes that the problem of waterproofed window and door frames is a very important aspect of the construction process (have you noticed that with every typhoon or consecutive heavy rain, how many buildings are damaged or destroyed?).