Today I’m thinking about entry doors, and whether to just grab an aftermarket solution or build my own like IdaSHO did.
Can you fit a commercial entry door in to your camper design? You might be able to, and, if the price is low enough, it might save you some time and effort. The insulation value might also be appealing.
I can indeed! I read something that implied that they're not well insulated, which is what made me consider building my own. I'd been planning on a commercial entry door from the start.
DIY campers are a series of choices that hopefully work well for the people they are built for. Sleeping under a truck cap and cooking on the tailgate might work quite well for a person, a couple, and perhaps even a person/couple plus a dog or two, but, won't work for four people and a dog unless the humans are short enough to sleep across the inside of the truck bed.
In your case, you are four people and a small dog that would like, among other things, to be able to camp in snow country without setting up tents or otherwise spending a lot of time on setup and tear-down. Makes sense to me!
In addition, you would like to be able to keep your camper tanks (and any unfrozen food that could freeze) from freezing while the camper is being driven down the road, while the camper is parked and empty of living creatures, and while the camper is full of 4 humans and a dog.
The empty of living creatures times could also be times of minimal airflow in and out of the camper, UNLESS that is also a time for drying out wet clothes and boots.
I think you will want lots of controlled airflow during occupied times (and drying times).
An low-enough-cost commercial (NOT residential) insulated steel door might work quite well for you.
Your insulated floor/walls/roof won't be that thick, but should be very well sealed, in a very small volume, so DON'T compare your camper to what is needed for a house of 2000/3000/4000... square feet.
Also, please see the post:
I'm in the process of planning out a DIY truck camper build, and I'd like to make it as close to a four-season camper as possible (for snowboarding near the mountains and such). I'm not planning to camp in extreme sub-zero cold (Fahrenheit), but would like to enter below freezing temps and be...
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