9#Anniehui * b& Q" I. S* G5 C ~( ~# d D/ W1 n) s' A1 l% WIs it your greenhouse ? Look like it is a kind of transparent sheet attached to the wood frame, not glass or anything, right?
2 f$ }. ?1 J4 P" @( K& c # P }: Z, j0 tMy 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.