Paul Simon: Hi! I am Paul Simon, Landscape Horticulturist with the National Gardening Association, and today we are discussing how to build a small greenhouse, and now we will discuss how to install your polyethylene sheeting.
After you have installed the base frame for your greenhouse, you are ready to install your polyethylene cover. For this project, we are using a 32 foot wide polyethylene rope. You can typically buy your polyethylene cover online for about a couple of hundred dollars.
To install our polyethylene sheeting, lay your 32 foot roll of polyethylene sheeting along one side of the greenhouse. Unroll the film over the entire frame, over to the other side of your greenhouse. You may need someone to assist you.
Next, wrap the end of the film with 1/3 wood furring strips and nail the end of the film in place to the other side of your base frame. Once one side is secure, cut the polyethylene on the opposite side, leaving at least 12-18 inches of overlap. Again, wrap this end tightly with 1/3 furring strips and nail this side of poly cover to the base frame. Finally, secure the overlap on either side of the greenhouse with additional furring strips and galvanized nails. Last, wrap the remaining film at the end of the greenhouse and similarly secure it to the base frame. For cross ventilation in warm seasons, you can tape and cut a window at the opposite end of your greenhouse. For the interior ground plane, you can install a two inch layer of landscape mulch. Okay, you have installed the polyethylene sheeting and you have now completed building your greenhouse. Congratulations!
You can visit our website at www.
org for a complete list, any illustration diagram, to help you build your own hoop style greenhouse. I hope these tips have been helpful and hope you can extend your growing season by building your own greenhouse. Good luck!