Answer:
1. In the case of waterproofing construction in a new site, the proportion of using this method (after preparing the base soil and applying a primer oil, the waterproofing membrane is directly applied in a baking or self-adhesive manner) is becoming increasingly low. The reason is that the leakage rate is too high! Think about it: using this method not only leads to more connections, but also more areas where the angles change; therefore, due to factors such as the base soil or the need to rush construction, the construction workers may experience problems such as curling and bulging; what difference does that make compared to not waterproofing?
2. The most common method used to install modified asphalt waterproofing felt on the market currently is to apply a layer of seamless asphalt approximately 3mm thick before laying the felt. If budget permits, it is best to use rubberized asphalt; at least a mixture of synthetic asphalt (i.e., ordinary asphalt mixed with 25%–50% rubberized asphalt).
3. After applying the non-woven asphalt coating, the above waterproof felt must be laid out one day later. This method of construction has a very low failure rate.