9#Anniehui - T5 z3 o: ^6 i3 ^1 L J* F( D; ^1 a5 c+ R
Is it your greenhouse ? Look like it is a kind of transparent sheet attached to the wood frame, not glass or anything, right?
4 R/ b( i& R' e3 l* u : S! O# \" A! K8 }, M: u' }5 b" |My husband seals the plastic layers himself, then use a small fan to blow air between the two layers. The plastic can only be bought at Horticulture supply stores.