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Old March 11, 2007   #1
dcarch
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Default Removable Lean-to Greenhouse

I am designing/building a removable lean-to greenhouse to gain may be more than a month's growing time in Zone 6/7. I hope to put my plants in ground 4/15. In my area I think normally it should be 5/15.

Because I don't have the room, the greenhouse will be in the same space as the final patch, so it has to be removable once the plant get to be may be 30" tall.

Once complete, I think the greenhouse can be installed and dis-assembled in less than 15 minutes and be stored away in very little room.

dcarch
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Old March 12, 2007   #2
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That brick/stone wall will be your friend. It will collect heat during the day and release at night!!! Do you have a place to vent it? It will heat up quick! Very cool!
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Old March 12, 2007   #3
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Quote:
Originally Posted by IMISSCOLO View Post
That brick/stone wall will be your friend. It will collect heat during the day and release at night!!! Do you have a place to vent it? It will heat up quick! Very cool!
Thanks.
Regarding venting, I will have small vent windows.
Regarding brick/stone wall, I will post a question in "General Discussions".

dcarch
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Old March 14, 2007   #4
ddsack
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dcarch - how is your lean-to coming along? I hope you are taking pictures of all steps of construction and will show us the end result. I will be very impressed if indeed you can take it down and re-install it in 15 minutes. I have a south facing wall on my attached garage that could take a narrow lean-to.

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Old March 14, 2007   #5
dcarch
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Quote:
Originally Posted by ddsack View Post
dcarch - how is your lean-to coming along? I hope you are taking pictures of all steps of construction and will show us the end result. I will be very impressed if indeed you can take it down and re-install it in 15 minutes. I have a south facing wall on my attached garage that could take a narrow lean-to.

Dee
A few more parts I need to get.

The concept of putting this thing together will be unique (I think) and a first for a lend-to greenhouse construction. If it works, those of us who are space-challenged and climate-challenged will have more options.

I hope to finish up in the next couple of weeks. My seedlings are growing tall.

dcarch
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Old March 18, 2007   #6
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Just a crazy thought: for a project of this dimension, the top could be made out of PTFE film, Tefzel [Dupont]or Hostaflon [Hoechst].

Tefzel used to be available in a form that had one edge with adhesive. See Eden Project, Cornwall, UK, visualize, longitudinal 'pillows'. Very good lightweight double-walled, high-insulation top requiring comparatively less structural support while shedding snow/wind/rain.

Tallman & Demarest, architects, Ithaca, NY, well-versed in these pillows. I have no financial connections whatsoever with them.

PTFE can also be used for a lightweight half-hoophouse, 2 layers, inflated. Much, much lighter than plastic, high light transmission, strong. Worth a thought for future projects.

m
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Old March 18, 2007   #7
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Quote:
Originally Posted by mouse View Post
Just a crazy thought: for a project of this dimension, the top could be made out of PTFE film, Tefzel [Dupont]or Hostaflon [Hoechst].
Tefzel used to be available in a form that had one edge with adhesive. See Eden Project, Cornwall, UK, visualize, longitudinal 'pillows'. Very good lightweight double-walled, high-insulation top requiring comparatively less structural support while shedding snow/wind/rain.
-------------------------
PTFE can also be used for a lightweight half-hoophouse, 2 layers, inflated. Much, much lighter than plastic, high light transmission, strong. Worth a thought for future projects.
m
Very interesting material. I haven't seen it being commomly used. Must be very expensive. I have gotten 4mm Twinwall poly panels for the project.

Can't wait until the snow melts so that I can complete the project.

thx

dcarch
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Old March 31, 2007   #8
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Progress pics.

dcarch

The three hinged support frames are attached to the base and the stone wall by screws.


The 4mm Twinwall poly-panels are attached to the frames by velcro and packing tape.
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Last edited by dcarch; April 1, 2007 at 08:09 AM.
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Old March 31, 2007   #9
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Dcarch -

This is how you're going to beat me for earliest tomato ...
A couple just went ripe in my window - I know they don't count, and I've seen yours all winter -
But we're on !!!

~ Tom

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Old March 31, 2007   #10
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Quote:
Originally Posted by Tomstrees View Post
Dcarch -

This is how you're going to beat me for earliest tomato ...
A couple just went ripe in my window - I know they don't count, and I've seen yours all winter - But we're on !!!

~ Tom
Trying to get my seedling s in ground 4/1!!!

dcarch
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Old April 1, 2007   #11
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Very cool ! I've never heard of that before ~
Growing them in a greenhouse, that you can "take apart" once
the weather gets better ... huh !

What ? Me worry ??? lol

~ Tom
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Last edited by Tomstrees; April 1, 2007 at 09:37 AM.
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Old April 2, 2007   #12
Rena
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Is there a place to vent? It is amazing how quick that gh will heat up.
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Old April 2, 2007   #13
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Quote:
Originally Posted by IMISSCOLO View Post
Is there a place to vent? It is amazing how quick that gh will heat up.
Just completed the thing yesterday.
You are absolutely correct that heat builds up.
With a little sun, 58 degrees outside, it was 108 degrees inside!
Night time; 36 degrees outside, it was 55 degrees inside (nice!)

I have put together a thermostat controlled fan to vent it. I will install it tomorrow.

dcarch
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Last edited by dcarch; April 5, 2007 at 04:21 PM.
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Old April 4, 2007   #14
Rena
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Target has the remote stats pretty cheap. In the morning the first thing I do is check the outside temp then the gh temp, just habit. It is getting to the time that the vents and fans aren't cutting it and it will be time to shut it down. I also found some cheap clip on fans at walmart that I move around. Helps with pollination.
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Old April 4, 2007   #15
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Dcarch -

Once its on - is it going to be easy to get off without damaging plants ?

Also, is it just going to be a cold frame with plants in pots - or plants rooted in the ground ?

~ Tom
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