Originally Posted by jen b
Chatting with some folks further about this, it appears as though Burro
floor construction is rather different from the Scamps, Casitas, etc. and that I do not need to go whole hog on a replacement.
This is great news. I can get away with installing a plywood floor inside the camper, over top of the fiberglass floor that is there, and still be utterly structurally sound.
I am most of the way through a 1980 Burro
13 floor replacement, but had to stop because of the cold weather.
I do not agree that you can put plywood inside the camper, over the rotted floor and still be utterly structurally sound. The floor I replaced sounds similar to your floor. When cut apart I found it was even more rotted than I thought it was. I would have guessed half of the floor area was rotted, but what I found was almost no solid wood. If your Burro
is like mine the screws holding the floor to the frame will be rotted where they contact the plywood. My Burro floor was 1/2" plywood with fiberglass on both sides. They did not seal the edges of the plywood very well around the wheel wells so water got in and rotted the floor. The rotted plywood had no structural strength left at all. The floor is an integral part of the strength of the trailer. The floor is screwed to the frame and if the plywood is rotted there is nothing left for the screws to hold on to. The walls are fiberglassed to the floor all around the inside and the fiberglass body overhangs the frame by several inches on each side. The floor is what holds the fiberglass body onto the frame.
Plywood over the rotted floor would make the floor seem solid when walked on but would not be structural, unless screwed to the frame and fiberglassed to the walls. The Burro has an inner liner that screws to the existing floor through a flange at the edges of the bottom compartments. There is not enough room to put a layer of plywood between the old floor and the bottom flanges. As painful as it may be, I believe that replacing the floor is the only way it will last another 30 years.