I did wonder, especially with the heat of a fire or stove inside the bender. I could totally see that the curved roof would make you wonder about using it as a coracle though 
M

M
In general hazel and willow don't really do re-use though. They become brittle, they crack and split. M
Silly questions, but I'm new to this: I was wondering how you have a fire in a bender? Presumably, the fire's kept small. How low could the bender roof safely be? Do you site the fire towards the back of the bender so escape is possible? And does the smoke get out through the door?![]()
The best way is to use a small burner - cut a rectangular hole in your outer tarp, and sandwich the hole with 2 slightly larger pices of wood (or aluminium) glue and bolt together - then use a hole saw to make the flue hole. Ive even seen tarps with windows fitted in this way....
but for an open fire, smaller is better.... or even best not at all. Use the trick of heating stones in a fire and bring them into the bender and drop into a pit in the center of the tent.
you can make a trench(from the pit to the outside of the tent) and a pit in the ground, and cover the trench with stones, and set the fire in the pit. make the pit fairly deep (1.5 foot) and the trench will become your chimney (kind of )
Dry dry wood, and as much ventalation are also key
How do people consider Carbon monoxide with fires in shelters?
The best way is to use a small burner - cut a rectangular hole in your outer tarp, and sandwich the hole with 2 slightly larger pices of wood (or aluminium) glue and bolt together - then use a hole saw to make the flue hole. Ive even seen tarps with windows fitted in this way....
but for an open fire, smaller is better.... or even best not at all. Use the trick of heating stones in a fire and bring them into the bender and drop into a pit in the center of the tent.
you can make a trench(from the pit to the outside of the tent) and a pit in the ground, and cover the trench with stones, and set the fire in the pit. make the pit fairly deep (1.5 foot) and the trench will become your chimney (kind of )
Dry dry wood, and as much ventalation are also key