by Big Guy with a Little Guy » Mon Nov 29, 2004 4:41 pm
If your covering it with aluminum, you might try using OSB (waferboard). It's dang strong, cuts nicely, and is perfectly uniform. It's cheaper that plywood, and just as high quality. The only problem is it's not smooth, and it's kind of ugly. But if you're covering it up, who cares?
Back to siding... It's just plywood with a rough exterior surface. I wouldn't think it's any stronger than the same thickness of ACX, but if it's cheaper, then rock on. I wouldn't hesitate to use it as the exterior surface. It would look rustic, and it wouldn't be so critical to get a perfect finish on it. It will likely have lens shaped patches on it. I'm not afraid of a less-than-perfect look if it looks like it was supposed to look less-than-perfect. I would be very unhappy if I spent $45 per sheet on perfect oak plywood and then messed up on the finish.
Be careful what you buy. Some siding is simply textured Masonite. Get real answers from real experts, not the pimple-faced "I think so" kid at a pretend lumber store.