Hi jndyer, I would be happy to. I will take some more pictures tomorrow.
The area I bulk-headed was 8'x13' and the ceiling was 12' 6" from the ground. I purchased two 12'x16' tarps.
I used 4, 1"x3"x8' long pieces of lumber I purchased at Home Depot for less than 8 bucks. I marked the ceiling joists so that I could screw into them to fasten the 1"x3"s
On the ground, I opened the tarps up all the way on the garage floor. I cut one of the 8' long boards and then screwed them together using a 1' long 3" wide piece of 3/8" plywood to join the two pieces of board. I now had the correct length of 1"x3" for the length I wanted.
I then laid that 13' joined, 1"x3" 3" below the top edge of the tarp so that I could fold that top 3" of tarp back across the 1 by 3. I stapled that piece of tarp all the way along. I then folded the 1 by 3 over, or turned it over once, so that I had another layer of tarp over the 1 by 3. I then again stapled that.
I then lifted the tarped and stapled 1 by 3 by 13' to the ceiling where I had marked the joists. My wife helped by holding the other end of the 13' 1 by 3 and tarp at the other end by holding another 8' long 1 by 3 in her hands holding the other end in place on the ceiling. I then screwed the 1 by 3 to the ceiling joists I had previously marked with the stapled side pressed against the ceiling so they wouldn't pop out.
I followed the same procedure to close off the short side. I cut and entrance way in the inside tarp.
This left 4' of overlap from both tarps wrapping around the right hand corner as you can see in the picture.
This way I have a double overlap door.
I used double sided tape and taped three pieces of Velcro on the inside flap which allows me to close it on the inside good and snug.
The overlap on the right hand corner overlaps going toward the front of the garage and this I sealed with duct tape on the inside and outside. This means that when the garage opens and it is windy, the air flow will flow in the direction of the overlap and not into my workspace.
I then used a small piece of 1 by 3 at the right hand corner of the ceiling to close that piece of tarp so it wasn't flapping loose.
I have about 2 feet of tarp laying on the garage floor turned into my work space and on this I have laid 2"x6"s the full length to hold it in place.
I stapled the tarp all along the wall edges on the inside so there is no leakage or draft from there
I hope this makes sense for you.
I will take some more pictures tomorrow and post them.
Chris