Galvanized steel is long lasting and adds permanency to your
greenhouse structure. Galvanized steel offers durability against
the harshest environments. Unfortunately, though it is strong
and reliable, steel framing can be very expensive and is not
found in greenhouse kits as often these days due to associated
cost. Shipping steel is also costly due to weight.
Plastic or PVC greenhouse framing kits are inexpensive and easy
to assemble. With a plastic framed greenhouse, you can move your
greenhouse easily if the need arises. If you are considering
this type of greenhouse kit you will need to take into account
how strong winds are in your area. If you live in a high wind
area you might not want to use this framing, or at least will
need to anchor it down for support. Plastic bends and breaks
when under duress from extreme weather, so it is ideal for
milder climates. Plastic framed greenhouses are also a good
Wood is aesthetically pleasing, especially when combined with
glass. It has the added bonus of being a natural insulator as it
absorbs heat throughout the day and releases it throughout the
night. Unfortunately, wood also absorbs moisture in the air, and
will rot faster, requiring more treatment/maintenance than any
other framing. Therefore it is ideal for very dry climates.
Aluminum will not rust and can withstand extreme weather.
Aluminum framed greenhouses are designed as compatible with a
variety of coverings from plastic, to glass, and polycarbonate.
The channels in aluminum framing generally include details for
you to add accessories to or to hang baskets from. An aluminum
framed greenhouse offers ease in assembly for the do-it-yourself