Roof top leaking oh Roof top leaking

Few days ago, my taman heavy rain and heavy wind.

Before:

After:







One of the roof tiles misalign.

Today ask contractor come to fix. RM 200 gone. He went up about 1 hour.

He just used 4 tube of xtraseal.



Only RM 8 * 4 = RM 32, Labour for him to earn is RM 160.

What to do, since he is expert.

I ask him why don't use cement, he say not lasting.