9#Anniehui $ F, T& O- W) E8 k3 L" E3 C2 k5 ^8 u* o
Is it your greenhouse ? Look like it is a kind of transparent sheet attached to the wood frame, not glass or anything, right?
3 ]' F( {/ v2 ^, @1 f0 s" L+ UMy 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.