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Thursday, July 15, 2010
Thomas, you are probably correct; such marks are typically caused by moisture reacting with the glue on the wall panels. As a starting point, removing the window trim was the right course of action. If you are sure there is no source of water entry at the window or the roof above the window then the water is likely entering somewhere else and eventually seeping towards the window, where it finds its way to the inside of the coach. A good place to start a detailed inspection would be exterior moldings or trim pieces mounted close to the window. Inspect them very carefully for open seals, rusted mounting screws, etc. Also inspect the entry door seals and any other fitment attached to the sidewall that is at the same level, or likely higher, than the window. Remember, water seeks its own level, so the leak could literally be anywhere above the window. Excessive moisture can migrate laterally to a lower location before it is actually manifests itself. Water leaks can be extremely difficult to find and need to be caught early to avoid an expensive repair. Search meticulously and thoroughly and you should find it. RV repair facilities can be a last resort if you simply cannot locate the entry point of the moisture. Some will be equipped with ultrasonic devices that can locate water leaks in a relatively short time. If all else fails, take it to a pro shop. Be sure to use a sealant that is applicable to the material(s) you'll be applying it to once you located the source.
More RV Doctor Resources
DVD: Do It Yourself RV Care The RV Doctor, Gary Bunzer, shows you how to maintain and care for your RV. This 63-minute DVD was produced in cooperation with the Recreation Vehicle Industry Association. The small price you pay for this will come back to you in all the money you save on your RV maintenance and repairs. Learn more & buy here.
The RV Owner's Handbook Learn how to perform preventative maintenance and repairs on your RV from RV technical guru Gary Bunzer. Learn about towing with a motorhome, winterizing your RV, holding tank systems, heating systems, water pumps, trailer towing, spring shakedown, water systems and much more. Easy to understand, even for mechanical novices. Learn more & buy here.