KEN we put the solar blanket outside on the roof in one continuous piece. For the wall panels inside we put it inside using one long piece for each wall and overlapped them. Then I put a roll down over the door- I liked your idea. Am going to use Velcro to hold the flap up like you did. We put some stick on vinyl insulation around the door and used a bunge cord to pull it tightly closed. All the panels are calked --and we have brick floor and foundation (our neighbors who have the same little greenhouse thought it was way over-engineered, but it makes it fun). For now we surprisingly have a huge amount of air blocked.
The clothesline has wire inside so we were able to twist and bend it nicely thru the drilled holes and it stayed in place fine and it is very strong. It really doesn't show much.
We are in Central Texas so not as cold as some places but we have had 8 freezes so far this year and last year we dipped down 22!!
Thanks for the suggestions on the sunblock fabric.
Carol
