Our waterproof measures are generally divided into three steps:
Step 1: Make a hole in the roof, pour waterproof silica gel into and around the hole, then drill in the bolt and cast the first waterproof line.
Step 2: Use "water-tight" surface and periphery of cover the installation hole to form a second guarantee.
Step 3: Coat the waterproof material special for engineering on the impermeable upper layer to be foolproof.
After the above three steps, the waterproof problem can be solved perfectly. Of course, specific circumstances, such as the waterproof of color steel tiles, will have corresponding waterproof treatment, so that you have no worries about water leakage.