Answer: Not advisable. Waterproofing should be applied directly to the original structure; the waterproofing of the courtyard should be fully integrated, so it is best to first apply the overall waterproofing of the courtyard floor, and only after that to apply the flowerbed or
Answer: In general, the elongation of water-based waterproof adhesives after curing is not worse than that of PU or waterproof felt. The problem is that these water-soluble elastic materials such as vulcanized rubber or acrylic rubber undergo curing by “
Answer: Not recommended. (1) Generally speaking, most water leakage in the courtyard occurs in areas such as cracked floor tiles, corners, construction seams, corners, ventilation ducts, manholes, and around the water outlets… etc.
Answer: Based on my years of experience, when a new construction site is commissioned to install roofing and the central courtyard, the materials are specified to be of the same brand, the contractor is the same company, and the same batch of workers are employed to complete the construction; however, after the project is completed and handed over to the owner,
A: During the growth process, tree roots secrete a type of “root acid,” which not only corrodes highly alkaline cement and concrete but also damages the bridge structure’s waterproof layer. In Japan,
Answer: (i) The basic requirements for the material used for waterproof materials should be: (1) high adhesion; (2) high elongation; (3) high tensile strength and tear strength; (4)
Answer: (1) The floor slab has cracked due to seismic activity, uneven subsidence, or displacement of the foundation. (2) Shear cracks have formed near all the column heads. (3) All corners have been reinforced.
A: Based on my 30-year experience, I believe the best construction method (I have had hundreds of successful cases at luxury housing sites in Taipei City; the client feedback is the best; not only can the room temperature be lowered in the summer, but also in the winter).
A: (1) Most waterproof materials are not afraid of water; they are afraid of the sun (the ultraviolet rays and ozone in the sun have a great destructive effect on waterproof materials), so they are even more careful when using them.
Answer: (i) Generally, after the RC concrete on the roof is poured, there is a process of shaking and crumbling, and the overall surface of the concrete is also rough. However, the RC concrete on the sloping roof does not undergo this process, so the surface is prone to unevenness and even rough spots.
Answer: (1) The grooves must be made in the surrounding area of all drainage pipes, the surrounding area of the through-pipes, and the corner joints; these must then be reinforced with water-based resin mortar or non-shrinkage waterproof cement.
Answer: The most vulnerable areas for rainwater leakage in a gable roof are: (i) the pipes that run around the eaves; (ii) structural cracks in the flat part; and (iii) the angle between the gable itself and the flat part.
Answer: (i) The terraces and flat roofs on the deck are built with lightweight concrete 7 or 15 centimeters thick on steel layers, and the retaining walls are mostly made of PC panels or cement.
A: After the roofing waterproofing work is completed, a water test should be conducted first. This is a necessary procedure, but it still cannot ensure that no water leakage will occur in the next five years or more, because: (1) PU itself is
Answer: (1) Construction procedures—waterproofing should be carried out before the installation of the plumbing fixtures and before all base plates and pipe support structures are cast and installed; the procedure cannot be reversed. (2) Waterproofing
Answer: In Japan, there is a so-called breather buffer method—the insulation-type polyurethane (PU) method (see the book “Waterproofing Construction Methods,” pages P.123 and P.126)—a modified modified asphalt.
Answer: No. This kind of short-term solution is the most unprofessional approach. According to my experience, whether it’s PU or waterproof felt, if it’s applied directly to foam cement or thermal insulation
A: No. Regardless of the type of waterproof material, it is best to apply it directly to the structure; if it is applied to the tiles, the waterproof material will not adhere properly due to the tiles’ lack of pores.
Answer: Such construction can easily cause the waterproofing material to swell, become poorly attached, crack, and degrade within one month of installation. Because the water that seeps into the structure cannot be removed within a short period of time, the water will continue to accumulate and cause further damage.
A: 1. In the case of waterproofing construction on new sites, those who use this method (after preparing the base soil and applying a primer oil, they directly apply the baking-type or self-adhesive waterproofing membrane) have increasingly higher success rates.
A: Since the high-speed rail track foundation and some station roofs in Taiwan have been equipped with high-performance waterproof materials, some public works projects and private luxury homes have gradually opened up the market, and due to the
Answer: Material type: elastic cement Application scope A. Liquid waterproofing (1) The coating material has no construction-related gaps or seams. (2) It is suitable for complex, high-curvature, or irregularly shaped structures.
Answer: The most common coating waterproofing materials are: (i) Polyacrylamide PU: (1) Paraffin wax series PU. (2) Non-paraffin wax series PU (carbon series black PU, one).
A: Currently, the most commonly used waterproof felt on the market is the traditional five-layer oil felt. Although it is still used in rural areas, the vast majority of new and old construction sites have switched to using CNS 104.
Answer: (1) In cases of plumbing leaks, it is often found that there are water leaks or water-staining marks on the top of the "wind-shaped wall" in the interior. Typical leak-detection companies often instinctively assume that this is external wall leakage, but in fact it is internal leakage caused by the pipes themselves.
A: 1. In the decision-making process regarding the selection of waterproof materials, some people insist on using a specific material, while others insist that a specific material should not be used; in the end, it comes down to—they are all the result of accumulated experience, and
Answer: A. The reasons are as follows: B. The main function of the primer is: Therefore, before applying liquid waterproofing for outdoor waterproofing projects, primer must be applied first. Indoor waterproofing requires a thicker primer because the base coat is usually thinner.
Answer: (i) There are two types of PU waterproof materials: Currently, some waterproof manufacturers in China confuse these two concepts, causing some well-known developers to have a strong aversion to PU. (ii)