How to deal with drainage of canopies?

The drainage treatment of canopies is a key step in ensuring effective drainage of rainwater and protecting the building structure from water damage. The following are the main methods for treating canopy drainage:
The drainage methods of canopies are mainly divided into unorganized drainage and organized drainage. Unorganized drainage refers to rainwater freely flowing down to the ground through the edge of the canopy, or directly discharged to the surface through drip pipes. This method is simple to construct, but it may cause rainwater to splash onto the wall, affecting the durability of the exterior wall. Therefore, in cases of low rainfall or small canopy area, unorganized drainage can be used, but attention should be paid to the overhanging length of the eaves to reduce the risk of rainwater splashing onto the wall.
Organized drainage refers to the organized discharge of water collected on the surface of the canopy through drainage systems such as floor drains and rainwater pipes to outdoor ground or underground trenches. This method can prevent rainwater from splashing on the wall and not hinder pedestrian traffic, making it the preferred way for canopy drainage treatment. To achieve organized drainage, the surface of the canopy should have an appropriate drainage slope towards the outside or towards the drainage outlet. It is generally recommended to have a slope of about 1% to ensure that rainwater can quickly flow towards the drainage outlet. At the same time, the top surface of the canopy should be well waterproofed, using rigid waterproof layers or flexible waterproof materials to enhance its waterproof performance.