1. Size error: When purchasing Chinese clay roof tiles, we should pay attention to the inspection of specifications. Products with size error greater than 0.5mm and surface flatness greater than 0.1mm are unqualified products, which will affect the difficulty of construction. At the same time, it also affects the effect after decoration.
2. Color difference: Because the surface color of Chinese clay roof tiles is rich, and each batch of Chinese clay roof tiles is difficult to ensure the same color of the bricks due to various reasons, when the quantity of Chinese clay roof tiles is large at one time, It is necessary to compare the color difference to prevent the obvious color difference of Chinese clay roof tile, and affect the overall effect of the decoration.
3. Water absorption of China clay roof tile: The purchase of China clay roof tile should pay attention to its water absorption, high quality green tile, water absorption is very low. The green white with high water absorption rate will crack the surface and spalling the whole wall after heat expansion and cold contraction. If the water absorption rate of China clay roof tile is not indicated, tea and water droplets can be used on the back of the brick, and the degree of diffusion can be observed after a few minutes. The less water absorption, the lower the water absorption rate and the better the quality.
4. Texture density of China clay roof tile; From the side, observe whether the surface of the offering brick is flat, whether there are pinholes and uneven fine, and listen to whether the sound of China clay roof tile is crisp, which indicates that the texture of the brick is high density and better hardness.
5. Product qualification certificate and product material inspection report.
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