Seneca floor damage

[send]

I found some water damage (wood rot) on the particle board under the kitchen cabinet. There was never any water on the top of the floor tiles or under the sink. There was a soft spot infront of the sink that prompted me to remove the kitchen cabinet. Once removed most of the floor tiles just lifted off. The center of the damage is near the center line of the exterior TV door. I have a cardboard laying on the floor in the hopes to see where water is getting on to the floor. Has anyone experienced this? Suggestions on type of wood to replace this section? This issue was "repaired" by the dealer the first year I owned the unit. The unit was stored indoors until a couple of years ago. Thanks for everyone that provides great info in this forum.

[SloPoke]

ohhh ouch. I want to follow this thread... but have no experience similar to this...

I do know that the floor is "styrofoam - sandwiched between a thin layer of Luan and compressed into a glued unit...

[send]

The top layer is particle board, not plywood. Plywood would be better IMO. Its not very thick, so matching the existing thickness may be tricky. Why there is any wood, Im not sure.

[Drv]

I just saw this. Any luck sorting thru cause? Sealant failure around tv opening?
Depending on how far gone the luan/wood is you may consider using the appropriate epoxy product from West Systems. I have used it in conjunction with fiberous fill product to do wood rot repair on older homes. The stuff is pretty amazing and will give you greater strength then you had before usually plus making it pretty impervious to further water damage.
Obviously you will want to find leak as well!
Caveat: Not all of their products are compatible with the foam sandwiched in between. Make sure you are using the right system for the application.

[send]

A update to this post: Had the unit at the dealer and I paid for 1 hour to service for them to find a leak. They could not. On my own I have determined that there is a small leak at the top of the TV door frame that allows water to drip in and get to the floor thru a small gap in the center of the frame bottom. Im going to seal this and put in a drain line in addition to sealing the top. The dealer has take no responsibility for not fixing the floor 4 years ago when it was under warrentee.

To fix the floor I removed the rotten wood and foam insulation. On top of the bottom plastic I epoxy'ed thin plywood, then added the foam. I used marine grade plywood coated in epoxy then floated epoxy over seam between old and new wood. Yes this is total overkill but thats how I roll. I may use epoxy to attach to floor tiles back. Most of these are under the kitchen cabinet but I want it water proof. Im considering adding a drain line incase of future leak from some other source (plumbing for example).

[send]

see update. thanks

[Crossingover]

We had a small area (approx. 15 x 8) in the bedroom with water intrusion during a horizontal rain storm that got past the slide seal. I carefully cut the vinyl flooring off the perimeter of the soft area and removed all the loose chip board and foam insulation down to the sheet metal subfloor. I filled the cavity with two-part fiberglass resin in several curing passes over multiple camping trips, being sure the rig was perfectly level each pass. This was very useful since part of the damaged cavity ran under the extended slide and the resin would penetrate the surrounding chip board as well. The traditional repair would require slide removal. I haven't yet done the finishing part of gluing back the vinyl I removed. This is the ultimate waterproof repair IMHO.