joerg68 wrote:
When should you replace? I am not a carpenter, so just take my personal opinion from experience fixing one camper floor section. Any structural wood that has lost maybe more than 20 or 25% of its useful cross section should probably better be replaced than repaired? Remove as much as needed to find solid wood and a good place to anchor to, then splice in a new piece.
Use an oscillation saw such as a Fein cutter or one of the cheaper knockoffs if you don't have one yet. It will make it a lot easier to make awkward, difficult cuts without tearing everything apart.
Wood that is not really structural, like camper wings or luan/plywood sheets covering something, I would probably not hesitate to fix with any of the methods mentioned above. Although these parts are often just as easy to replace than to repair...
TC lower floor is small, so easy to repair. I actually needed a shim for my new, taller truck, so I just screw whole sheet of plywood under and that reinforced weak floor.
But when it comes to cabover floor, you need to go from end to end, what means pulling siding out.
I pulled my fiberglass siding since it delamintated on most of the floor anyway, but than took me well over a week, to glue it back few inches at the time with lot of boards with several supports to hold the siding till glue dries.
Meaning would I have only couple of rotten members in cabover - I would pull the interior paneling and do the resin/fiberglass repair.
Each job scope needs to be asses well to be successful.
