Slide leakage on 5th wheel

[atcrist]

We have a 2007 Holiday Rambler Alumascape that is experiencing leakage of moisture into the bottom plywood. We had an authorized dealer do some inside repair to a corner area of the living room slide but they could not determine a leakage source as all the upper seams looked and felt to be in good shape. Their only advice was to continue checking all the visible seams and caulk as needed. Since then we have discovered that moisture may actually be entering in along the bottom side edges of the slides. From my visual inspection, it appears that moisture that runs done the side wall of an extended slide, instead of dripping off the bottom trim modeling may actually cohere to the bottom of the trim and migrate to the under edge seam between the trim moulding and the metal sheeting beneath the plywood floor. Moiture drops that actually reach this seam can be "wicked" up into the plywood sub flooring, causes the plywood to swell and open the seam allowing moisture to enter more rapidly. Does anyone have experience with this type of problem and how to cure it?

[Ray,IN]

First, Water intrusion is the most common problem with any RV, as you are experiencing. Locating the leak source is very difficult. I recommend locating an RV service center that uses a SealTech Leak Detection System. Once the source is eliminated, you may then successfully repair the damaged areas.
If you suspect water is running down the side of the slideout and wicking into a seam, you might try placing a length of waterproof tape diagonally along the sides of the outside wall of the slideout, and hopefully re-direct the water away from the floor area some.
Sorry I can't be more help.