You can pay a pretty penny for a commercially produced greenhouse. Some people think that you can build a greenhouse from dacha junk, but there is a better option.
Greenhouse made of PVC pipes
The pipes can withstand winds up to 15 m/s, but require reinforcement with metal pins. The roof slope is 25–30 degrees to allow snow to slide off.
What to cover with
You can cover such a frame with bubble wrap.
It retains heat 30% better than regular film and can withstand temperatures down to -10 degrees Celsius.
Polycarbonate. The material has its advantages. It is durable and serves up to 10-15 years, but most importantly, it protects from UV. There is a disadvantage - high cost.
Reinforced film. Pros: it is inexpensive and easy to replace if damaged. However, the service life of such material is no more than 1–2 seasons.
Errors
It is essential to provide for ventilation.
Lack of ventilation leads to overheating, which kills 60% of seedlings (the optimal temperature inside the greenhouse is +25 degrees Celsius).
Therefore, make vents or raise the film on a hot day.
Reviews
"I made a greenhouse from old window frames. Covered it with bubble wrap - -5°C inside +12°C!" - Gennady , "DIY" forum.
"I tried to cover it with boxes - everything rotted in a week. Now there are only pipes and film!" - Alexey , "Ekodom" group.
