2 years ago i made a greenhuse with 2x4's and rolls of plastic.it's 6 feet by 10 feet.but the roll of plastic i used dont last that long.it becomes dryrotted all to easy.im gonna make the green house much larger soon as i have the money to do so.but what im wondering,is this.is it a good idea to use hard plastic thats shaped like coragated tin a good idea as long as i make sure i dont crack it and all?