9#Anniehui . i9 {! p2 U! ~) o ' v2 g8 C) V3 l3 ~0 K) x% yIs it your greenhouse ? Look like it is a kind of transparent sheet attached to the wood frame, not glass or anything, right?
: m/ G1 j+ v1 C r0 G% DMy 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.