When it rains, the roof will leak.

1. The function of the small blue tile roof is not to be waterproof, but to guide the drainage. So the drainage slope should be steep. The traditional slope in southern China is 1:2. According to the roof with two slopes, it is popularly called' four moisture', and the slope angle is actually 26 34'. Therefore, it is doubtful whether the slope of the landlord is relatively gentle;

2. The practice of small blue tile roofing is to pile up dense blocks, rather than relying on white ash, which has strong water resistance, cracks when it dries up, and leaks when it is washed by rain;

3. According to folk tradition, the roof is a warehouse with small blue tiles, which are renovated and replaced with layers of tiles before the rainy season comes every year. If you can't guarantee the timely renovation, it can't be done once and for all, and it's not reliable to use cement instead of white ash!

It is a long-standing fallacy to paste tiles with white ash.