What would be the best method to seal laps on low pitch R-panel @ 1.3 degrees?
I’m building a 18ft x 27ft fre standing lean-to style patio cover. I want to keep the roof line within bouderies of existing facia on right side eave. This means it will have only a 5" drop over the 18ft length. I will be installing 91 degree end wall flashing to facia at top (lapping under existing 2" drip edge. I will be installing 90 degree side wall flashing to facia at right side lapping under 2′ drip edge as well. My concern is standing water of course. So i don’t know if the butyl srips on the crowns will be sufficient to prevent leaks. Thanks aheasd for any help.
Mike Powell
Hi Mike,
Butyl tape is junk, and will not last.
What I would do is run a thick bead of solar seal 900 under each overlap, and seal each screw with it.
Also, highly recommend to have 1 piece panels (18′ long) and no overlaps! overlaps WILL leak..
Pay special attention ate roof to wall flashing – also use solar seal there.
Also crimp up the end of the panel that connects to the wall, so that if water does go under end-wall flashing, the bent end of the panel will prevent it from leaking.
5" over 18′ is not ideal, but is still a positive slope, and water WILL run off …
best of luck
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