. (hope that bbcode worked!)
A tarp would work for some of the construction bits. And I guess we can use our RV and some other boards as a wind shield.
For the deconstruct, I can see more of a challenge if it involves sawing in situ. The size (25m x 25m) and at up to 4.5m high plus the physical constuction will make getting a tarp in place impractical, especially if we're sawing at 2m above the ground. I can just see that fine sawdust blowing straight away if there's even a small breeze, let along strong winds.
I can't be the first to be trying to deconstruct something like this, so is there any other solution apart from "don't do it that way"?!
I'm assuming that even fine sawdust does count as moop and needs to be contained?