9#Anniehui ( r. u, H0 I+ z/ d) t' T / e5 u1 O1 U# f! w# o8 \7 tIs it your greenhouse ? Look like it is a kind of transparent sheet attached to the wood frame, not glass or anything, right?
3 u- d1 Z( b: o s+ m% [9 ?; ^ 5 P7 T+ v" ^- I8 b. E! T5 ZMy 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.