How to repair Chimney Flashing Leak in 5 minutes. This will blow your mind
Channel: Flat Roof Doctor
Date: 2019-08-28

Repairing Chimney Flashing leak in 5 minutes. This method uses Turbo Poly Seal and is better than any caulking.
Turbo Poly Seal can be bought at https://bergstromm.com/
Why do Chimneys Leak?

1. Most Chimney Leaks are from the flashing.
2. The Chimney Crown can crack and cause leaks
3. The Flu Pipe can corrode and cause the chimney to leak

How do I repair my chimney leak?
A) How to repair the Chimney Flashing.
The copper flashing is typically inserted in a slot that is cut into the brick face of the chimney. Then caulking is used to seal that grove and keep the flashing in place.
The sealant will deteriorate and fail to cause the chimney to leak.
The best way to fix this problem is to make a transition from the metal flashing to the brick. We use Turbo Poly Seal with polyester fleece. This method, as shown in the video, has been proven to be very successful. The Turbo Poly Seal is a Polyurethane and Asphalt Resin composition that will adhere to the brick and the metal. 
1. Always make sure you prepare the area before applying Turbo Poly Seal
2. Remove silicone caulk and tar that others have used
3. Then fill the gap or groove with urethane caulk
4. Apply one layer of Turbo poly Seal
5. Install the polyester fleece over the freshly painted sealant
6. Paint a final coat to cover the polyester fleece

B) Sealing the Chimney Crown 
The crown normally consists of a cement slab that was poured on top of the bricks and leveled off to taper down. This cement slab is inferior and will crack easily.
The best solution for this is to use Turbo poly Seal and cover the entire crown sealing it.

C) Replacing the Flu Pipe
Once the Flu Pipe is corroded there is not much you can do. You will need to get a Chimney Specialist in to insert a new pipe.
Here is another video you can watch to see how it is done https://youtu.be/8mfBeFNOWbM 

To buy Turbo Poly Seal or Super Silicone Seal - https://bergstromm.com/

0:00 Chimney Flashing Leak repair
0:30 How to look for a leak
1:59 Found Caulking causing leaks
3:00 Turbo Poly Seal application
3:40 1st step - Masking Tape
4:09 2nd step - Turbo Poly Seal coating
4:30 Embedding fleece
4:57 Applying 2nd Coat Turbo Poly Seal
5:45 Removing Masking Tape
6:23 Summary of job