Bulging sides.......

[jay317]

I have a 1989 Winnebago Chieftain and the fiberglass on both sides above the wheel wale are starting to bulge out I have inspected very carefully and there are no signs of water leak
Also what I noticed is I looked at a couple of Winnebagos on the internet and noticed the same thing...was this a common problem with these motorhomes or do I have a problem,and what would you guys do at this point????

[Me n Slowpoke]

Ours is like that also,, same evenness on all four wheelwells.. so I 'assumed' it was only extra reinforcement against breakage..

[RobRV]

What You are seeing is called delamination. Quite simply the Exterior Filon sheeting is seperating from the plywood. Unfortunately there is no magic cure .

[Me n Slowpoke]

Jay, post a picture 'up close' and I am sure that someone with a lot of experience in this will let you know for sure what they feel that it is...

[Displaced Connecticut Yankee]

My Minnie has a common RV construction flaw, which may also point to your problem. Along the entire bottom of my exterior walls is a plastic "C"-shaped trim piece, with the opening pointing up. This gives a fairly neat look to the otherwise rough-looking end of the wall material along the bottom. The problem is that this "C" holds water, which eventually wicks up into the walls, causing delaminaion. There are drain holes, but too few, too far apart, too small, and too ineffective. Around the wheel wells there will be additional water thrown up by the turning wheels, which can make this an area susceptible to faster delam, as is the case on mine. My Minnie also suffers from extensive manufacturing errors of missing or misplaced caulking, that caused delam and rot in other areas.