Plan No. 6222. A three-page plan for a pipe frame quonset greenhouse. Cover is double layer polyethylene. Details include foundation corner, end wall head, inside frame for tomato vine support, tie-down cable anchor, inflation apparatus, and horizontal evaporative pad. Of the chemical wood preservatives, only copper naphthenate and wolman salts can be used in greenhouse construction.
Many different materials are available for covering greenhouses.
Glass is expensive, and little is used in the Southeast. Three plastic film materials are in use as greenhouse covers. It has high light transmittance, except in the ultraviolet region of the spectrum, and is transparent to infrared or long-wave radiation. Its chief disadvantage is its lack of durability. PE's that will last longer.