I live on the top floor and there are cracks in the roof. The roof is SBS modified asphalt waterproofing membrane. How to fix the water leakage now?

1. First, the cracks in the roof should be repaired, and then the waterproofing membrane should be treated.

2. First, analyze the causes of water leakage. If it is caused by cracks in the roof, it is necessary to repair the cracks first, because most of the water leaks on the top floor are cracks, and it is necessary to fill the cracks with leak-patching paste, and then proceed to the next step after drying. (If the joint is less than 1MM, no leakage sealant is needed).

3. SBS waterproofing membrane is laid on the roof. If it has been more than 67 years and the surface is seriously damaged, SBS can only be laid again. If the time is short and the damage is not very severe, then buy one or two barrels of oily polyurethane waterproof coating and paint the damaged parts again, which can be used for two or three years, saving time, money and labor.

4. The leaking point of the roof is generally in the shape of nozzle and joint. These details must be handled well during construction, which will be much safer.