Teardrop Trailer – Build Day 4


I wanted the R-Max stuff but settled with R-Tech 1 1/2 inch Insulfoam. It comes in small 2×4′ pieces that fit in my car, and the price is pretty good. This stuff also has a reasonably good r-value.

It comes with a shiny side, as I understand it this is to reflect heat. The choice is do I want heat reflected in or out. I choose out, here’s why: A cold trailer is quickly heated by a warm body and some blankets. A hot trailer is basically an oven, a very big slow cooker. I’d rather cuddle than cook.

I imagine a man in a white lab coat eating handfuls of this stuff while another man in a lab coat holds a clipboard and watches. I love science.

This insulfoam¬†is exactly the same thickness as the inside of the walls. They were really meant for each other. I’d thought I’d have a little bit of space, maybe even enough to creating an air gap. I’m not sure if that would help or hurt condensation issues so I’m not sure if I’m pleased or disappointed. Regardless, I am happy that the foam isn’t too thick. I don’t imagine attempting to sand down the foam would be a lot fun.

I had most of a can of this polyurethane spray kicking around so I put a light coat on the inside of the walls before I placed the insulation. I didn’t really have enough to offer much protection but I don’t think it’ll hurt.

Later I’ll sealing the outsides of the walls with marine primer and paint, fingers crossed there won’t be much moisture inside. I don’t plan to store the teardrop in the rain though I would really like it to hold up to some wet camping trips.

I finally took on framing out the longer back curves. I was sick of sawing wood so I grabbed the chisel instead and low and behold, a tool designed for carving wood really carves the shit out of wood.

chisel2FAST WORK
I made a good sized mess in no time.

It still needs a bit more shaping and some sanding. I’m going to do the final shaping with the pieces clamped together so they’ll be perfectly symmetrical shapes.

The foam stuff went pretty easy but cutting it is quite a mess, I was sweeping up little white crumbs all day. The foam is just wedged into place and when the inside wall skin goes on it’ll be sandwiched in nice and tight so I don’t think I’ll even bother with glue.

There is still a more work to do framing the back curves and once those are complete I can spray-can in insulation to seal a few ~1/2 inch seams.