First of all, I must affirm your approach of attaching great importance to roof waterproofing. During waterproofing repairs, we encounter many people who underestimate waterproofing before repairing, neglect waterproofing during repairing, and only worry about leaks. When the house leaks everywhere, the feeling is particularly similar to the state of mind described in Du Fu's "Song of Thatched Cottage Broken by the Autumn Wind"!
There are several key points and difficulties in waterproofing "prefabricated plate roof platforms" that you should pay special attention to: 1. The prefabricated plate heads are placed on walls or beams, which are the concentrated points for shrinkage and deformation, and are also the focus of steel Special attention should be paid to waterproofing (Loyal mortar waterproofing agent). Separation gaps need to be left. First use 10 cm wide polypropylene as the base, and then use sealing material after drying. 2. The parapet corner is another place that is prone to shrinkage, deformation, cracks and water leakage. The seams need to be left and treated with sealing materials after drying. 3. Pipe mouth and drain outlet. 4. If waterproof mortar is used, cracks may occur between the prefabricated panels and cause water leakage. You can brush twice with elastic K11 before applying mortar.
As for materials, it is recommended to use Loyal mortar waterproofing agent combined with elastic K11! Key parts: Parapet corners, pipe mouths, drains, and spaces between prefabricated panels should be brushed twice with elastic K11, and then smeared with waterproof mortar for 2 centimeters, and the separation joints should be treated with sealing material.
The important thing is the construction details!