I am building a smaller and different version of this, the frame is wood and pvc and is about 8 feet tall at the peak, not sure how deep i will dig the pit, probably 4 feet. Its about 12 feet wide at the base and will be about 24 feet long for now. I built it so i could expand the length later, and am using a anti condensation and thermal 6 mil cover. I only have one big banana this year so I hope 12 feet of height will be ok. I also bought a roll of weed cloth to put on the floor to keep the thing from becoming a ragweed jungle in the spring lol. I am hoping the black weed cloth, and black barrels filled with water help retain some warmth as well. Do you find that having the pit helps retain a lot of heat?
