If you are having a problem with a hard to find leak in a classic slide out, here's an inexpensive fix that you might want to consider.
After watching a driving rain hit against the closed slide-out. It was apparent that water was rolling around the aluminum awning cover and right into the horizontal joint at the top of the slide.
I've heard that if the curb side is kept higher, then a slide is less likely to leak. However as you know conditions are not always perfect.
Here's how I fixed the problem and haven't had any evidence of a leak since the repair.
1. Either purchase a typical 90 degree angle aluminum roofing drip edge or bend your own 4 inch wide piece of aluminum right down the middle.
2.Cut the length 4 inches longer than your slide awning roller.
3. If you want it to look good, paint both sides of the drip edge silver or clear coat the bare metal.
4. With the awning in the closed position, release the extension awning locks, and pull the awning open just far enough to insert a small piece of 2x4 behind each awning arm.
5. Your aluminum awning cover should now be rolled out flat and facing the sky. Take the drip edge and lay it along the edge of the aluminum where your awning material begins.
6. Space the drip edge so the overhang on each end is equal. Drill and pop rivit one end of the drip edge into place, then rivit the other end.
7. Install as many additional rivits as you desire. I found that every 12 inches is about right.
8. Caulk the entire drip edge on one side then remove the 2x4 blocks, let the awning roll back into the holders, then clear caulk the other edge.
9. The end result is an attractive little overhang that will keep the water rolling off your roof from entering at the top of your slide when the slide is closed.
10. Now, open your slide and you will see that the drip edge turns upside down and also serves to divert water away from the material awning. This will help prevent rain water belly and drips landing on the roof of the slide.
This works pretty neat. If I can figure out how to post some photos on this site I'll try to do that.
~ A. Kenney 2690