Also, since the rebar lets in so much light there can be leaf burning with regular poly, however woven poly That's why I only use woven poly that I sell as it's so tough. Wood! Impressive eh? I should mention here that the rebar has grooves or corrugations in it, perfect for holding it in the soil, but, being rough it could abrade regular poly. For example, all the rebar used in the arches of my 50 foot greenhouse take up less space that the cross-section of just two two-by-six pieces of One advantage of rebar is that its smallĭiameter blocks little light. In that case I would use one-inch diameter rebar. If you want a wider rebar greenhouse, you can buy longer rods or weld two together. With the long side facing south it is interesting that when the sun directly strikes the greenhouse perpendicularlyĪt some point in the curve, giving maximum heat and light. Insert supports in it if snowdrifts cover it, like here. It is very wind resistant and deflects the wind over it.
It uses less poly to cover it than any other design per sq. It's so fast to erect that I still can't believe it. Also the shape is very strong and eliminates the building of a roof and uses less material. Tunnel greenhouses are quite popular because they heat up so fast, having less interior air to heatĬompared to any other shape. The shape of our rebar greenhouse is like half a tube (i.e. I have built the first rebar greenhouse, but of course that won't make the Guinness book of Records!īelow, here for our customers, are my directions for buildingĪn 11' x 50' rebar greenhouse and a 26' x 65' rebar and wood greenhouse. Rebar are those long rusty-colored iron rods placed in concrete to strength it. I wanted an "El cheapo" freestanding greenhouse, which was simple to build. Few are fortunate to be able to purchase such a jewel. It's beautiful with double glass and laminated wood beams. Introductory price of $6000 (excluding fans and shutters. I just read a very attractive full-color catalog advertising a 10' x 12' home-attached greenhouse at a special Build Your Own Greenhouse and Save Money! In 1982 the frost-free growing season was only 3 months for warm crops.
My Rebar greenhouse has only one layer of poly on it, yet in 1982 it prolonged This was followed by many days in the nineties! It never got that frosty again till over a month later! We also had a solo "spoiler" frost on It's shortened by those wretched one or twoĭays of frost that is preceded AND followed by fantastic growing weather! We here in Altona had frost (27 degrees F.) on Augthat killed our tomatoes, potatoes,Ĭucumbers, squash, and cantaloupe. Why a Greenhouse?Īfter talking with customers on the phone all over the States and Canada I've found the biggest problem is the short growing season. Rebar is usually purchased from a lumber yard or building supply store near you.
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