1, joint repair, most of the water leakage on the top floor is cracks, so it is necessary to fill the gaps with Yijia patch, and then proceed to the next step when it is dry. (If the joint is less than 1MM, no leakage sealant is needed. )
2. Brush it twice with water-based waterproof coating or transparent waterproof material with wall permeability, which is comprehensive. If the gap is polished, the broadband should reach more than 20 cm. This ensures adhesion. Waterproof coating is permeable and bonded, with good elasticity and long service life.
Extended data:
Preventive measures for roof leakage:
1. Before the leak-trapping construction, the roof should be cleaned first, such as some sand and dust. If the roof surface has high and low spans, then its waterproof layer construction method should be from high to low, or from high to far.
2, coating waterproof layer, must wait for its surface to dry before construction. For example, leveling the roof with a square waterproofing membrane, standing for 3 to 4 hours and then checking. If there is no watermark on the roof covered with waterproofing membrane, construction can only be started.
3, if it is a large area of film, then it is necessary to strengthen its impinges mouth, gutter and other places. Secondly, the thickness of the coating waterproof layer should be designed reasonably, and there should be no bulging and cracks.