Color-coated steel drip edge

Drip grooves and drip lines. Below the outer window sill, there is usually a concave line designed to prevent rainwater from flowing into the wall. Rainwater drops off outside this line, which is the drip line. It is suitable for parts in construction projects that require water blockage, typically installed below the window lintel. If the concrete surface is very smooth, a "texturing" treatment should be applied to the surface.