All I see is tinnitus

Pavers are the absolute wrong choice here. Do you have a crawlspace and not a basement?

Is it a shed? If it's a house I would want more r value.

So are you building it out on the inside or outside? Because it seems like you will have to already go up to 2x4s to support whatever window you put back in there.

Surely you mean 6 inches thick

Could be 24" on centers

Your music speaks to me.

That much blow is probably several steps away and might simply take some time to effect your village.

I believe you, I've just never seen one like that.

That must be a really old way of doing it.

I've replaced several of these with the type you wind across the header and they still had tracks and rollers down the sides.

Yes there is. There are rollers on the sides of the panels. The rollers are contained in a tracked upright vertical and horizontal piece.

A pair of vice grips on the track will hold the door if he doesn't have a long enough pipe or ladder