Why not plug the screw hole with a special rubber plug? That will save money.

Hello, why not plug the screw hole with a special rubber plug, which will save money? Yes, it is necessary to save, and another method of blocking is more effective. See construction technology.

1. Before plugging the screw hole, clean up the garbage in and around the hole, and sprinkle water to wet the hole;

2. Knock the rubber plug which swells with water into the screw hole; ?

3, preparation of expansive mortar, used to compensate the shrinkage in the hole and prevent external wall leakage.

I hope I can help you. Thank you.