It is inexpensive, has good light transmission, and the air layer between the films prov ides good insulation from cool temperatures. For more permanent structures, fiberglass is a popular, inexpensive alternative. Other polycarbonates are also available as substitutes for glass. Glass, the traditional glazing material, has the highest light transmission properties of the available materials but can easily break. Most glazing materials are compared to glass.
Foundations link the greenhouse with the ground.
Foundations may range from a simple pole driven into the ground to a more complex masonry wall on concrete footings. The type of soil, frost line, frame construction, cost, and local building codes all affect the type of foundation you choose. If in doubt, consult a contractor or an architect with greenhouse experience to make sure your greenhouse will be secure. After you have decided on the glazing material, you will need to provide a frame or structure. Frames can be constructed of wood, steel, aluminum, composite materials, or a combination of one or more.