Re: 1988 Imperial 280sf engine swap and restoration (pics)
Ok guys, I want to thnk all of you for solid suggestions, I really appreciate having all of you here, to bounce ideas off of, and with all i have to do to get to the end of this, ill be leaning on all of you for years to come! Alot of what I have coming up is a bit over my head, experience wise.
So I have a path forward, im thinking of going back to my origional clear plastic plan, as Arch stated, the greenhouse effect will be lost with the solid tarp. I was worried about the summer heat, but some nursury shade cloth added in the summer, along with a louvered fan above the door should keep temps down a bit in the summer, while getting free heat all winter.
To hold everything together, i decided to add 3 rows of firing strip purlins, one along the top center, and two between each pvc cross brace and the knee walls. This way I can use the husky 6mil plastic from HD, in 3 20' wide layers (thats how the rolls come). The purlins will be screwed c clamps atached to each pvc pipe, not allowing any lateral movement.
Free lighting and heat is hard to pass on, if needed, i can double up the plastic to make 12 mil.
Because i had the wood and windows on hand, cost isnt too bad, a few hundred for pvc and hardware, another 2 for plastic, and that should be good for the winter.
You guys are the best, thanks!
Ill post more pics as I progress.
Its interesting how we all have different weather to contend with. In OK that would make an excellent soccer ball for the wind! But we don't have to worry too much about snow, every so often we get a 1' or so, usually much less. The ice is a different story, that can get nasty. Hopefully that keeps you dry and warm for the winter! Looking forward to more work on the boat, and thanks for sharing the construction of the shelter. By the way, would you get any heat value from using a clear green house plastic for the roof? might be cost prohibitive, but you might get some nice solar heat gain 
