Well, this worked out way better than I expected.
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Used 1.5" schedule 40 PVC and zip ties to attach the end of the tarp to and roll it up. It works great.
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You can see I have the outer strip installed across the top.
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Now I just need the side strips completed and it would be optimal to swap out my double pulleys for smaller ones.
On to the other wall.
This is what I used.
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On sale and a 20% off coupon. [emoji6]
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It's hung across the top but I ran out of steam. Had the heater running pointed into the space with the ceiling and it was easily 10 degrees or more warmer than it was in the rest of the garage. I'll get the extra rolled up and trim this extra off. Put some new eyes in after its trimmed and put the roll up hardware in. Then I can flow test it and figure out what I need to do for structure in the wall.
After that is lots of spray foam.
The way things are looking, I may be just preparing for spring at this point but maybe I can catch a nice enough day to get the cab in primer.