I dont know, i just dont see metal siding tightening it up that much, ill probably end up using the T1-11 plywood siding now, i know it will tighten it up for sure, just hate to have to paint it, but..anyways, im going to get the metal for the roofing and get it up there, but first i still have to deal with anchoring that one side wall to the ground because those few posts are only 6" in the ground and like i said, im afraid that if i sheath the roof and then wait for a bit before i get to sheathing the walls, a strong wind from one of those strong spring storms we get here might lift the wall up, i need some more ideas on how to anchor those few posts, i REALLY dont want to mess with drilling those rocks to anchor the poles to, i went looking at lowes for some of those mobil home anchors but didnt see any, im needing as many ideas as possible on doing this as easy as possible, it will only have to last for a short time till i get the floor poured..HELP!!