Pound stakes in the ground If you are building a lean-to or Quonset, you can reinforce your frame with rebar and PVC or a non toxic variant.  Pound rebar into the ground every 4 feet (1.2 m). Leave 48 inches (121.9 cm) protruding from the ground.  Once the rebar is set, you can loop 20-foot sections of tubing over the rebar to create your frame. Stretch your plastic film (preferably a non toxic type of plastic) over the frame and attach it to beams at the bottom. Small, loose gravel allows for extra drainage in a greenhouse environment. Hire builders to pour concrete, if you need a foundation. They will need to bring in concrete forms and pour the floor of your greenhouse before it can be framed. Untreated wood can degrade in as little as 3 years. Choose your wood treatment carefully. Some wood treatments require that the food is no longer listed as “organic” or safe for consumption because of the use of chemicals. Consider a treatment like Erdalith, which has limited leaching properties.  Use metal supports in place of wood supports whenever possible. You may be able to simply bolt film to wood.  The more expensive the covering, such as glass, fiberglass, or double walled plastic, the more time you should take to seal it to the foundation and frame. Research the best procedure for the covering of your choice.
استخدم الحبال بامتداد الأرض لتقيس الأماكن المرغوبة لوضع الركائز. عززها بحديد التسليح. اسكب طبقة مستوية من الحصى على الأرض بعد دفع دعاماتك. عالج أي أخشاب قبل استخدامها وكن واعيًا ومدركًا لما تستخدمه للمعالجة إذ ليست كل أنواع التغطية والمعالجات مناسبة لملامسة المنتجات الغذائية. أحكم الغطاء على الهيكل قدر الإمكان، يمكنك تثبيت الغشاء إلى الخشب فحسب.