| There are several frame types being used to | | | | either plywood or fiberglass sheets. Fiberglass sheets |
| construct greenhouses. Depending upon your needs | | | | can also be screwed to the hoops to form a cover |
| some are better than others. The chief structure | | | | over the frame. |
| materials are galvanized steel, aluminum, PVC, | | | | Wood |
| fiberglass and wood. | | | | Treated wood can also be used to construct a |
| Galvanized Steel | | | | greenhouse. This type of structure would be a bit |
| Steel is one type of framework used on kits. It is | | | | harder to build. Just about any type of covering could |
| strong, and galvanized steel will be rust resistant. But | | | | be installed over a wood frame. It is strong enough |
| it will rust a bit. Because of the weight, it will cost | | | | for glass, Polyethylene films can be stapled to it and |
| more to ship than other materials. It is not readily | | | | polycarbonate or fiberglass sheets can be screwed |
| available for do it yourself construction. Galvanized | | | | to it. Wood is the most versitle material to be used |
| steel tends to be used on the lower end greenhouse | | | | for a greenhouse structure. Besides pressure treated |
| kits, but it can be found on the more expensive ones | | | | lumber, cedar and redwood can also be used for |
| too. | | | | greenhouse construction. Both are lightweight and |
| Aluminum | | | | strong. Redwood is the most readily available and |
| Aluminum is strong, will not rust, and lightweight. | | | | tends to be used in high end kits. Greenhouses |
| Round or square tubing is used, depending upon the | | | | constructed from redwood are both attractive and |
| covering material to be used on it. Square tubing is | | | | longlasting. |
| available from building supply stores and this material | | | | Fiberglass |
| could be used to construct a greenhouse frame. | | | | Fiberglass tubing is also used as a greenhouse framing |
| Drilling holes in it is fairly easy, so fiberglass panels or | | | | material. An advantage to this material is that it will |
| polycarbonate sheets could be fastened to the | | | | not conduct heat or cold easily, thus helping keep |
| structure. | | | | heat in and cold out. |
| PVC | | | | The materials used for a greenhouse frame must be |
| PVC pipe can be uses to construct a Quonset type | | | | strong, lightweight and water resistant. A number of |
| greenhouse frame. It is readily available, fairly cheap | | | | materials fit this description. All are used in various |
| and easy to work with. Up to one inch diameter can | | | | types of greenhouse kits, some suitable for easy do |
| be bent for form hoops over which Polyethylene film | | | | it yourself greenhouse structure construction. |
| can be stretched. Ends can be constructed from | | | | |