9#Anniehui $ G' c: P$ o( @- b, Y0 K7 @' C* V' z% O" F4 C0 e9 v: _0 A; W
Is it your greenhouse ? Look like it is a kind of transparent sheet attached to the wood frame, not glass or anything, right?
" l) t4 A2 [) q$ r: p# H7 }" F2 C7 @ 1 q3 k# Z) p2 JMy 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.