What's up with these tarp shelters at the farm auctions

[jimmyj]

We bought the Costco 10X20 version a few years ago, it lasted about 2 months until we had a windstorm with 50+ mph gusts. At that point it went airborne and flew up over the shop and ended up in a heap against our lathe house 100' away. My wife and a neighbor disassembled it before it could do anymore damage.
Last year I repurposed the frame into a greenhouse, needless to say I anchored it down a bit better this time. The green house has solid framed in ends and I used a double layer of 6 mil uv stabilized greenhouse film, an inflation blower keeps the plastic tight so it does not flap in the wind. It seems to be working a lot better as a greenhouse than it did as a shelter:laughing:

How did you seam the plastic? The shape you have is fantastic and I'd love to do the same thing. I just threw the frames for a couple of these exact shelters into the scrap bin but I have one more complete frame and have never been able to figure out how to seam the plastic.

 

[Paul Thornton]

Mapper, thank you for the pictures. The greenhouse looks great!