It’s a little late to start figuring out how much insulation I’ll need, but I finally did it. Well, actually, I made Jef do it. The point is, I finally figured out that all the interior surfaces that require insulation and sound deadening add up to a grand total of 275 square feet.
I only have 200 square feet of insulation. Hmm…
The Low-E peeps recommend insulating floors with two layers of insulation, which means that the 275 figure is really more like 350 square feet. I’m 150 square feet short.
This wouldn’t be a big deal if I had all the money in the world to throw at this crazy van project. Unfortunately, I’m neither rich nor powerful, so the number of benjamins in my wallet is a constant concern. The fact that I just dropped $150 on spray adhesive isn’t helping things. I think that’s the least fun thing in the world one could ever spend their money on.
The choices are: spend another $170 on more Low-E insulation, or spend $130 on a combination of Low-E and cheap polystyrene. It seems kind of ridiculous to hem and haw over a paltry $40, but everything is like this. Every option has a trade-off, and if you keep opting for quality over frugality, you could end up spending much, much more money than you anticipated.
Despite my apprehension over buying more Low-E, I was curious about how well it would hold up underfoot, the concern being that it might flatten out under enough weight. What can one do about such a concern? Why, conduct another pseudoscientific test, of course. I asked Jef to jump up and down as hard as he could on top of two layers of Low-E and some plywood. The result: not a single popped cell. Nice.
Here’s a photo that Jef snapped of me today.