I was thinking of how to have fire in a
greenhouse.
Stoves of any kind would need a thimble of fireproof/resistant material for their exhaust.
I want to use removable flexible glazing which usually means flamable plastic sheets.
But the Instuctibles member Thinkenstein,has a technique that might make for good a fire proof glazing that can also be rolled up during the hot months:
http://www.instructables.com/id/SHOWER-CURTAIN-Silicone-and-Glass-Fiber-Mat/
In the comments the creator say it is flammable,but I don't see why it would be.
I would do this over aluminum or fiberglass window screen