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The choice of waterproof coatings follows four principles
When choosing waterproof coatings, it's essential to follow four key principles to ensure long-lasting and effective protection:
First, consider the local climate conditions such as maximum and minimum temperatures, roof slope, and usage environment. Select coatings that offer good heat resistance and low-temperature flexibility. In hot regions, opt for materials with high heat resistance to avoid melting or running. In colder areas, choose coatings that remain flexible at low temperatures to prevent cracking or becoming brittle.
Second, take into account the degree of movement or deformation in the building structure, the type of construction, annual and daily temperature fluctuations, and any potential vibrations. Coatings with appropriate tensile strength and elongation properties should be selected. For roofs with significant structural movement, use coatings that can stretch and adapt to changes without breaking.
Third, evaluate the exposure level of the waterproof layer. If the coating will be exposed to sunlight, choose materials that are resistant to UV degradation and thermal aging. This is especially important for roofs that are not covered by other layers, as UV exposure can significantly reduce the lifespan of the coating.
Fourth, if the roof has a drainage slope greater than 25%, avoid using coatings that take too long to dry. A slow-drying coating may not adhere properly or could lead to issues like pooling or uneven coverage.
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