This evening I covered over the old pvc with a new much larger strip of pvc. I picked up a strip of white 18oz pvc tarp material from a heavy duty tarp manufacturer. Bought some 1" x 1/8" thick aluminum flat bar and a tube of sealant. After 4 or 5 hours of slow work I now have the new PVC in place and strapped down with the aluminum and the edges nicely sealed up with sealant. I still need to trim back the flaps that hang off the sides of the roof. Here's the current way she sits now. ...

- ImageUploadedByTapatalk1433825123.856564.jpg (157.29 KiB) Viewed 1312 times

- ImageUploadedByTapatalk1433825110.339999.jpg (178.11 KiB) Viewed 1312 times
I'm not sure yet how long to leave the excess PVC. I've read a few people in these forums suggest it should be long but I'm not sure how far to leave it. Right now there is about 5in overhanging.
I wondered about getting some sticky backed Velcro and velcro'ing the flaps down while driving to keep spray and water out preventing them from tearing in the wind.
Anyone have any suggestions on that front? How long should I leave them and should I worry about the flapping while driving?