Piet investigated and found several soft spots in his own unit and developed a unique solution to the problem using a product called PC Petrifier Wood Hardener that is a non-toxic brush on, pour on product, used to repair boats with wood rot problems.   It was purchased from Protective Coating Co., Allentown, Pa, 18102, Phone 1-800-220-2103.   Website address is www.pcepoxy.com .   Cost of the 2 gallon used was $90.  On the container it states: "P.C. Petrifier is a single component adhesive, formulated to fully penetrate and revitalize rotted wood. It is environmentally friendly. It penetrates deep into soft rotted wood fibers, restoring old wood to near original structural intregity. Pour, brush, or spray over area to be treated.  Allow for overnight cure."  Following is Piet's description of the repairs with photos.

I removed the cushion floor under our couch/bed with a knife around all the edges. It was severely wet underneath and more severe than the floor material showed. This made me remove the rest of the living space area, at the front of the trailer it was wet underneath, and I removed the frig. all black, soft and wet underneath. The frig was too large for the door, so I parked it on the sink/stove cabinet. Next step: Mineral spirits, rags and choregirl to remove the glue, the flooring was stuck in only 3 places. We then used a 30" fan laying flat on the back couch, blowing down, to dry the wet area's. Next was a belt sander to make sure that there was no glue residue left.

No cabinets were removed,  but I have removed the screws, and carefully pried the cabinets up slightly. I lifted the flooring under the cabinets and pressed it back down as there was no damage. When the floor appeared dry, I drilled 1/8" holes at a 45 degree angle around the outside edges, to get under the walls. 1/4" deep. For the rest of the floor, wet areas only, I drilled 1/4" holes, also 1/4" deep, 2" apart, then saturated the floor with PC-Petrifier Wood Hardener, using a brush to spread it. Keep adding hardener to the floor before it dries. It follows the grain in the wood and soaks in until saturated. The good area's received only 2 coatings, I am very pleased with the result. It looks like a clear plastic coating, and I cannot depress the previous bad areas. It is a water based resin, no smell, no mixing, at
 www.pcepoxy.com . They have additional products for badly rotted missing areas, and you could rebuild a beam with a product called PC-ROT TERMINATOR.

 I used 2 gallons of PC-Petrifier Wood Hardener.  Our nearest store carried 8 and 16oz.  REMOVE YOUR JACKS before starting, I did not and I should have. I am adding 1/4" Plywood at the jack area under the floor, then drilling the hole location, before adding the same plywood above the jacks for reinforcement.

We finished the living area with 12"X12" tiles, nothing under the frig. and under the couch/bed area, this way I can keep an eye on it. I had siliconed the part where the siding is stapled to the floor, removed this, as it was not holding. Now I am using construction grade glue on the seam, then 1X3 strips, screws, glue on the sides, it is tough and waterproof and then undercoating is applied. It is not a real hard job. My trailer is slightly  heavier than before but I am happy with it.
 

(Click on each Photo to see enlarged version)

This photo shows what your floor will look like when there is water damage underneath the vinyl.   Note discoloration.

2 gallon PC-Wood Petrifier was $80
Additional glue, undercoating, plywood, screws and bolts $40
New tile floor  $30

Questions, email Piet de Zeeuw