The weather was beautiful in East Texas this weekend and I had plenty of time to work on the trailer. Something about sunshine + a project you're enjoying + a full cup of coffee brings about a special kind of joy.
I cut a few more sheets of 1" XPS down to size to fit between the furring strips. So far no glue is required for the insulation. Everything is friction fit and then paneled over. Even the roof. I try to aim for cutting everything 1/16 too wide and use a long metal T and a utility knife to cut the insulation. A serrated knife secretly lifted from the kitchen helps with trimming.
At this point I was ready to re-install the ceiling, but first needed to fabricate the "divider" between the bed area and garage. I used 1/2" maple plywood with the good side facing towards the living quarters. This will be stained or painted later. The interior decorating committee hasn't decided yet.
To make a measurement record of the roof line I cut a piece of the extra furring strip material down to the width of trailer and rested it on top of the walls where I planned to mount the divider. Then I marked on the piece of wood the distance to the roof-line. These measurements could then be transferred to the plywood to create a "template".
My crude roof-line template...
Transferring measurements to the backside of the plywood.
The base of the plywood was then notched to allow it to sit 1" down into the bed-frame. After the initial notching I probably took it into the trailer and back into the garage 7 or 8 times. Each time shaving just a little bit here and a little bit there with the orbital sander to get a smooth fit.
Here it is closer to finished than not.
Once the fit was right I used 1" x 1" wood studs on the wall, the back of the bed-frame, and a few brackets attached to the furring strips to mount the divider. Here are a few pics.
With screws into the bed-frame and small brackets connecting the roof. The backside also has small blocks at the furring strips to keep it from moving rearward. Goal was to allow enough "flex", but make sure everything is snug and vibrates as little as possible.
Once the plywood was mounted I filled the 1" gap on the back with a solid layer of 1" XPS. The garage isn't as well insulated as the living area, so I wanted to thermally divide the two. Here you can also see the 1" studs used to secure the frame to the walls. The piece of insulation was cut to be between the strips and rest on top of the 1" metal bed frame edge.
This insulation will be covered with thin plywood or FRP to finish out the garage. I'll likely place a few items like helmet holders, paper towel holder, etc on that wall up beyond head-banging height.