How to patch a leak on a Flat Roof Rubber Membrane

This video is to demonstrates how to patch a leak on a flat roof. In all my life this was one of the most difficult repairs I have ever done.
Chapters:
0:00 How to Repair a flat roof
0:28 Removing coatings, tar
1:35 Using Torch to remove mastic
3:30 Installing Rubber Patch
4:24 Conclusion and Tip

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