My house is an old house in 2000, and the top floor leaks rain. What are the good methods and how to deal with personal maintenance? The property was repaired last year, and it's not working at all.

Products such as asphalt ointment cannot be used for roof leakage. This is the simplest and most economical method, because there is no other advanced waterproof material. Because asphalt can't adhere to the original base surface, water can easily penetrate between asphalt and base surface, so it has no effect on water leakage. You can't use paint either. You should use professional waterproof materials.

Now, the best way is to clean the original asphalt first and clean it thoroughly. If there is a crack, it should be repaired with a plug first, and then directly brushed twice with K 1 1, or JS polymer waterproof coating, dried once and then brushed twice. You can go directly to the store that manages waterproof materials without looking for a construction team to do it. If the construction base is dry, you can do it first.