Small blue tile roofs are widely used in traditional houses in China. It is still used in some places. The section of the small blue tile is curved. Size and specification are not uniform. When paving, don't spread small blue tiles on their backs and cover them together. The paving bricks are laid in a ditch shape, and the paving bricks cover the longitudinal joints of the paving bricks, and the overlapping length with the paving bricks is about 1/3. The overlap of upper and lower tiles is long, with six dew points and four dew points in rainy areas and seven dew points and three dew points in rainy areas. Small blue tiles can be laid directly on the rafters or on the roof slab.

The plan is as follows