One of the major advantages and ten disadvantages of flexible waterproof materials in practical use:
Advantages: Can be used for prefabricated roof roofs and other institutions with large changes in the construction of waterproof parts.
Disadvantage 1: Variety of varieties, various varieties of performance and construction methods vary widely, must be professionals, special tools to meet the quality requirements of construction, so in the sales of materials, must complete the construction, it is difficult to universal and universal use Promotion
Disadvantage 2: The requirements for the waterproof base are relatively strict, and must be constructed on a completely smooth, smooth surface with a water content below 9%, otherwise there will be stratification, drumming, and drowning;
Disadvantage three: poor plasticity, it is difficult to deal with the opposite sex change or narrow waterproof parts, easy to leave gaps and weak points;
Disadvantage 4: The degree of bonding with the cement base is poor, and it is easy to delaminate at locations where the base surface is wet and the base surface has a large infiltration pressure. In particular, it is difficult to carry out the construction of the facade (wall), and the net construction must be performed. It is easy to cause the whole wall to fall off;
Disadvantage 5: The formed waterproof layer is thin in thickness and weak in strength. The construction must be done with a mortar protective layer to prevent the puncture damage and the influence of ultraviolet rays. It cannot withstand the erosion of acid, alkali, chlorine and other corrosive substances, leading to premature leakage. ;
Disadvantage 6: After the construction, a layer of mortar must be applied again to carry out the next construction process.
Disadvantage 7: The durability period is short. After the construction, the performance is gradually attenuated and decomposed due to aging. Leakage occurs. Every 3 to 5 years will be repaired and replaced. It is a periodic material;
Disadvantage 8: The overall cost is high, construction, materials, storage and transportation costs are very high, to achieve compliance, the cost per square meter is not less than 60 yuan;
Disadvantage 9: Flammable, it is not uncommon for welders to ignite at the construction site and cause fire;
Disadvantage 10: Contains poisonous volatile gases. During construction or after construction, long-term volatile benzene, xylene and other harmful carcinogens.
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