Instructables

Greenhouse - Geodesic dome

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Picture of Greenhouse - Geodesic dome
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Main idea behind this design is to make construction cheap & easy.

You would need:
Wooden laths (cheapest kind) - amount depending on how big you want the dome
Drill
Some-kind of pincers
Fence wire (soft)
Small clip/nail/clamp gun
Saw
Plastic film roll - about 8m x 2.5m
Some thread and anchors (bricks) for stabilization
Wide transparent tape
1-2liter Varnish & brush
Color sticky markers (for ease of construction)
Scissors / Cutting knife 

For window (x times how many you want):
Thread,
Small Hinges x2
Wider wooden laths for covering gaps around border

For doors:
Small Hinges x 2 
Furniture magnets 1-3
Furniture metal corners x 8 (4 for doors, 4 for frame) 
Wider wooden laths for covering gaps around border
Some handle

Soil & seeds or plants

Total costs for me were about: 80 EUR = ~ 105 USD

Greenhouse has been standing well since beginning of the summer
 
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Step 1: Cutting wooden laths

Picture of Cutting wooden laths
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You would need to cut 3 types of wooden laths

For calculations I recommend to use this site (I built 5/8 size):
http://www.desertdomes.com/dome3calc.html

High precision is not necessary (+/- 5mm)

For example for 1.5m radius (that I had) you would need
A elements 0.522m x 30
B elements 0.605m x 90
C elements 0.618m x 120

You can tweak these numbers in order to get the most out of wooden laths that in my case came in about 2m length.

I advice you to write letter A, B, C with pencil on each stick and tie them together by groups.

I advice sawing trough 4 or more laths at once.
Sawing took for be about 3 hours of work.

Step 2: Drilling wholes in both sides of sticks

Picture of Drilling wholes in both sides of sticks
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I advice to drill trough 3 or more sticks at once to make process faster.

In my case it took about 2 hours of work

dustind016 months ago
Do you think I could use this design for the structure to build an igloo? would the plastic hold the weight?
evalds (author)  dustind016 months ago
To hold weight of snow you will need stronger connections than holes and metal wire otherwise it will probably pop structure inwards. Wooden sticks might hold snow and plastic might not be necessary if snow is sticky enough.
psst268 months ago
beautiful
How can I get more information?
manuka9 months ago
Kid friendly bamboo dome Instructable underway !   Check => www.instructables.com/id/Kid-friendly-bamboo-geogesic-dome/
lenparhs9 months ago
Hi, great instructable. Just about to build one, and I noticed that you have the numbers wrong. I think you mean for a 5/8 size:
A elements - 30
B elements - 55
C elements - 80
Otherwise we would be building a complete sphere, which would be cool, but difficult to grow plants in.
manuka10 months ago
The devil in dome construction often relates to the strut securing! I've a variation that uses bamboo slid into black garden irrigation hose offcuts. These are (single) gutter bolted at the hose overlaps -the structure is both rigid & quickly dismantled for storage. I'll rustle up an Instructable if interested- the approach particularly suits kids!
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Rich99 manuka9 months ago
wonderful idea! elegant, too. thanx
Ray from RI manuka10 months ago
By all means Definitely Do an Instruct able...!
mikolynn manuka10 months ago
Yes please, it looks great!
flyingpuppy manuka10 months ago
Will await your instructable on those struts
watchingunow10 months ago
Super job on the Instructable. Looking forward to the Arduino project. Thank you for sharing.
olmon10 months ago
Nice instructible- - only recommendation I would make would be to use redwood, cedar or pvc for the spars. With the work involved, it would be worth the small extra expense in the longer life it would give to the structure.
baecker0310 months ago
this looks like a great idea, although I am worried about any type of strong winds or heavy rain or hail. in harsher climates I might go with boxed aluminum or stronger with a heavier material for the structure. for larger green houses, a rectangular shape might be best for space allocation... ie co2 burner, circulation system, sprinkler etc.
mikolynn10 months ago
Great ibles!
Nice work!
Very creative and decorative.
psycophonic10 months ago
This looks so cool. one other possibility might be using stiff pvc piping. You know the stuff you can put a good curve in but it don't kink. Put holes in 1 end of all. Cable tie together and spread out kinda like the support beam thingies on a brollie. I think it would work well as already rust/rot proof and holes in bottom of poles would allow a stake through for anchoring.
I like your mod. idea and cable ties are my friend frankly I made a chain link fence once and used cable ties instead of the metal ties it worked so amazingly well and I literally "zipped" trough it!... The smallest PVC made would be nice and strong and still light weight...one thing though ...it appears he used staples from a staple gun to secure the plastic to the frame... Do you have some cool idea knocking around about how to secure the plastic to the frame?
This would be great for starting tomatoes early outside where I live! The perfect green house and then super easy to move off of them later once frost is not an issue.
I saw a guy making didgeredoos from PVC pipe, and he used a heat gun to heat the plastic, so he could form depressions and bulges in the pipe for resonances.

Me thinks preheating the ends, and heated or not - press dies, to flatten the ends.
bschran fenikkusu10 months ago
Liquid nails or E-6000 would work well to adhere the plastic
The problem with pvc is that it warps inside the greenhouse--even in the north of Spain where I live, where temperatures never get above 35C. One book I have describes making a hoop greenhouse with pcv used as a sleeve and rebar inside for strength--obviously with a diameter that allows it to flex into hoops. This was the grey stuff for water, and also the black high pressure grade.
Wroger-Wroger10 months ago
When I do jobs that have many pieces that are identical or groups of identical parts, I use cutting and drilling jigs.

Everything is the same length, all the holes are drilled in the same spot.

Good for projects like these.
tootall112110 months ago
Props to ya for doing this on the cheap. sure others have more ideas, but where's theirs? I don't know tho, I haven't seen the old fashioned lathe available around here for a very long time. Might have to find a substitute. There is also a heavier grade, clear plastic that would work great, but costs more, of course. I guess a guy could take this idea to the extreme, and really build it solid and functional, but gotta give ya props for not only doing it like you did, but making a good instructable too.
flyingpuppy10 months ago
Methinks we'll be having tomatoes next year. GREAT instructable!
jmorrison710 months ago
This is a great project. I will make one of these once I move later this year and can build a garden. Thanks for the instructable and thanks for the resources!
mnmama10 months ago
Very cool design. I think you used a "staple gun" to attach the plastic to the bars. Maybe there is a way to put a top vent on it to let extra heat out on hot days so you don't have a cooked salad garden. Simple, inexpensive and fast installation. Nicely done.
bschran mnmama10 months ago
it appears there are vent windows in the design
aelkovits110 months ago
I really like this design and the geometric qualities it posses. I might recommend a small solar fan mounted to help with humidity and a automatic watering system. Overall, a nice little project.
foobear10 months ago
Have always thought about building something like this. Do you think it will survive the wind and weather?
evalds (author)  foobear10 months ago
Probably depends how bad weather you have. During the summer it survived couple of very windy days (around 15m/s and heavy rain). As long as you anchor it well to the ground and make sure there is not blowing wind trough or under it when it's closed it is not affected by weather.
astral_mage10 months ago
there are home built this way. look em up