The influence of external environmental factors
1. The role of sunlight
Sunlight is bad for flexible waterproof materials. The energy of the sun's rays raises the temperature of the asphalt felt and induces a chemical reaction, thereby accelerating the oxidative aging of the waterproof material, reducing the toughness of the asphalt felt, and increasing the brittleness. The situation is more complicated for the waterproof material system that can undergo a photochemical reaction. In the early application of ordinary waterproofing membranes, sunlight provided the necessary energy for the chemical cross-linking reaction, and the strength and elasticity of the material may be improved; however, as time goes by, the lighting energy will eventually lead to and accelerate the waterproofing Aging and fracture of the coil. Brand waterproof coating
2. The influence of temperature
High temperature will accelerate the oxidative aging process of asphalt materials. For some added plasticizers (plasticizers generally have higher boiling points, are not volatile, and have good low-molecular oil compatibility with asphalt felts, which can increase the toughness of asphalt felt waterproof materials. Excessive temperature will also promote their migration and increase Plasticizers cause the brittleness of the material to increase. In this way, if the ambient temperature changes greatly or the temperature is low, the probability of material fracture or cracking will increase significantly. In addition, the material is very viscous at high temperatures, and when the material is subjected to stress caused by external forces, it is easy to Plastic creep occurs, and low temperature will increase the brittleness of ordinary waterproof materials. In a certain period of time, if the flexibility of the waterproof material is insufficient at low temperatures, the low-temperature cracking and deformation fracture of the material may be caused by the internal stress of the material caused by the slow accumulation.
3. The impact of rainfall (including rainfall and snowfall)
Generally speaking, the amount of rainfall has no direct effect on the performance of waterproof materials. For ordinary waterproofing membranes with waterproofing problems, more frequent and long-term roof water ingress will also cause local damage. The snowfall process is accompanied by cooling and a relatively long melting process, which will also increase the brittleness of ordinary waterproof materials.
Impact of improper construction method
Improper construction method is also one of the reasons for the leakage or damage of roofing asphalt felt waterproofing membrane. For example, if the roof base is not flat or clean, dirt and other dust are mixed to form an isolation layer; the screed has low strength and poor quality. The roof area is relatively large, and the joints are not set reasonably. Cement waterproof coating
It is precisely due to the influence of these external environmental factors and improper construction methods that ordinary waterproofing membranes leak or damage before their service life. They are usually caused by "bulging", cracking and peeling of the waterproof membrane and the bonding layer of the waterproof membrane.
The influence of the roof itself
The building roof structure itself has a great influence on common waterproof materials, such as the slope of the roof. If the slope of the roof is large, the roof can drain, and the precipitation of the roof reduces the contact between rainwater and rainwater. The use time of the asphalt felt waterproofing membrane also reduces the probability of leakage of the waterproofing material and prolongs the service life of the waterproofing material. The influence of roof usage
In normal use, the asphalt felt waterproofing membrane is damaged due to roof maintenance or installation of other equipment on the roof. In the roof maintenance, the asphalt felt is easily damaged without paying attention to the protection. Other equipment installed on the roof may damage the ordinary waterproof coil used for fixing.
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