Is drip edge necessary above the doors to the cabin? I've noticed some trailers have it, others don't. I'm wondering if it provides a "big" difference having it?? I can't imagine it keeps water away from the top of the door when traveling, so I assume it's there to keep rainwater away from top of door when parked and using the trailer. But for those that don't have it, did you wish you did have it.... a vice versa, for those that have it, do you think it makes a difference, having it?
Thanks
John