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Old 02-08-2011, 08:51 PM   #1
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Join Date: Nov 2010
Posts: 13
Possible dryrot in ceiling

My 2006 Fun Finder X139 apparently had a leaking problem before I bought it used. During this last rainy season, I had it parked level, which I now found out is a no-no. Rain pooled on the top and the A/C opening was sitting in a pool of water and leaking through the roof to the trailer.

Now it's parked unlevel and tarped, as the RV repair guy recommended. He also suggested turning the furnace up to 90 and heating it up for a few days, which I did. Now that it's sunny, I opened the windows in hopes of airing the trailer out.

Even thought the wood frame seems to dry out when I heat the trailer, it tends to get moist again in a few days, due to the humidity in the air from the rainy weather. And there is persistent mold on the frame around where the A/C vents were installed.


1) Is the entire FF roof made of wood? Is this frame simply a square cut out of the ENTIRE roof, so if I wanted to replace the wood, I'd have to replace the ENTIRE roof, which costs more than the trailer is worth? Or is most of the roof made of something else, and there is simply a frame made of wood that is inserted into the ceiling to hold the A/C vent?

2) If (1) is YES, if the roof has mold or dry rot, is it a lost cause? Is there any way to fix it without replacing the ENTIRE roof, or spending thousands? We only paid 9K for the trailer to begin with.

3) If (1) is YES, can we replace that frame around the A/C vent WITHOUT replacing the ENTIRE roof?

4) If (1) is NO, is it easy to replace that frame of wood that is moist and has mold around the A/C vent?

Here are pictures on Picasso:

2006 FF X-139
2006 Honda Pilot 4WD


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Old 02-09-2011, 10:16 PM   #2
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Join Date: Aug 2001
Location: North America somewhere
Posts: 14,071
Paul I will offer my opinion about your pictures and water damage. I am assuming your trailer has wood construction. I would first remove the A/C unit Rooftop RV Airconditioner Leaks so you can see the damage better. There is a special foam gasket between the roof and A/C unit (see link). This gasket is compressed by those mounting bolts, which are only finger-tight. The compression of the foam makes it water-tight, while still allowing room for flex between the A/C and trailer.
If the wood is still solid it can remain, if it is weak and crumbly it must be replaced. This is actually not difficult, just time-consuming.
For mold/mildew control there are two products I'm aware of to seal and kill the mold affected areas.
Safe Shield Mold Cleaning Product
and Concrobium Mold Control Removes, Eliminates and Prevents Mold and Mould at Home | Concrobium Mold Control
Even if you do manage to get the insulation dry, it will still contain mold/mildew spores, which are re-activated upon contact with any moisture. This might necessitate removing all the ceiling panels and replacing all insulation.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
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