Square Foot Gardening Forum
[table bgcolor=#000000 height=275][tr][td]

Hello Guest!
Welcome to the official Square Foot Gardening Forum.
There's lots to learn here by reading as a guest. However, if you become a member (it's free, ad free and spam-free) you'll have access to our large vermiculite databases, our seed exchange spreadsheets, Mel's Mix calculator, and many more members' pictures in the Gallery. Enjoy.


[/td][/tr][/table]
Search
 
 

Display results as :
 

 


Rechercher Advanced Search

Latest topics
» What is this? Plant identification?
by brianj555 Yesterday at 10:34 pm

» My first Attempt
by Mikesgardn Yesterday at 8:04 pm

» Areogardening
by BeetlesPerSqFt Yesterday at 5:18 pm

» January 2018 Avatar: Surprise Us
by sanderson Yesterday at 4:51 pm

» My Shreveport Garden 2018
by sanderson Yesterday at 4:47 pm

» 2018 - First Annual Seed Exchange Week - January 20-28 (Edited)
by BeetlesPerSqFt Yesterday at 4:13 pm

» Are vegetables hurt by too much light?
by BeetlesPerSqFt 1/20/2018, 8:38 am

» Seed Starting!!
by brianj555 1/19/2018, 9:14 pm

» Spring Fever Anyone?
by sanderson 1/19/2018, 3:06 pm

» How's the Weather Where You're At?
by sanderson 1/19/2018, 2:56 pm

» Weight Watchers Turkey, Bean and Vegetable Chili
by hammock gal 1/19/2018, 8:43 am

» Sow True Seeds
by AtlantaMarie 1/19/2018, 8:00 am

» Colored Mulch
by No_Such_Reality 1/18/2018, 7:12 pm

» Taking on 4 Season Gardening
by Roseinarosecity 1/18/2018, 5:19 pm

» Fourth Year SFG in Canada
by trolleydriver 1/18/2018, 3:53 pm

» SUGA 2017
by SQWIB 1/18/2018, 12:57 pm

» Senseless Banter...
by sanderson 1/17/2018, 9:42 pm

» Butternut squash, turkey Italian sausage, cannelini bean soup
by yolos 1/17/2018, 9:25 pm

» Happy Birthday!!
by yolos 1/17/2018, 9:12 pm

» N&C Midwest—January 2018!!!
by Scorpio Rising 1/17/2018, 7:08 pm

» Is there ever enough compost?
by has55 1/17/2018, 2:41 am

» What are you eating from your garden today?
by Scorpio Rising 1/16/2018, 9:10 pm

» Gophers
by countrynaturals 1/16/2018, 12:32 pm

» High heat tolerant tomatoes
by walshevak 1/16/2018, 6:03 am

» Mid-Atl - Jan 2018 - Brrrrrrrrrr! and Happy New Year
by AtlantaMarie 1/15/2018, 6:43 am

» CANADIAN REGION: What are you doing in January 2018
by sanderson 1/15/2018, 3:53 am

» New England Jan 2018
by hammock gal 1/13/2018, 5:50 pm

» Air Fryer! HELP!
by sanderson 1/13/2018, 3:26 pm

» New SFG box-Humanitarian way
by sanderson 1/13/2018, 3:24 pm

» Drafts?
by trolleydriver 1/13/2018, 1:18 pm

Google

Search SFG Forum

Green House Floor Insulation?

View previous topic View next topic Go down

Green House Floor Insulation?

Post  marcia@thekats on 5/25/2012, 7:35 pm

I am planning on a greenhouse purchase and live at 6000' in Montana and want to insulate the floor. This would be a hobby greenhouse. Does anyone have an idea of a good way to insulate the floor?
avatar
marcia@thekats

Posts : 1
Join date : 2012-05-25
Location : Hobson, MT

View user profile

Back to top Go down

Re: Green House Floor Insulation?

Post  dsfin on 5/25/2012, 11:52 pm

Hello Marcia,

I've got some past experience with greenhouses at the commercial level.

First, I would say that you really DON'T want to insulate the floor of a greenhouse!!!
Think of the floor as a potential heat sink (heat storage) that will collect heat during the day and release it at night.

But I understand your question. Though I don't have experience at that elevation (6000ft), I realize your issue as you have cold nights and probably very cold winters and you want to capture and retain as much thermal energy the sun will provide.

There are some interesting ideas that could be utilized on larger greenhouses (those with a better ratio of floor square footage to the interior volume within the greenhouse). But I don't think those ideas or methods make sense (cost is high & affect is minimal) for a hobby greenhouse.

But never the less, there are some things you can do!!! For the floor treatment I would recommend first a layer 3-4" of crushed rock as the floor (for drainage). Then cover that with black ground cloth/plastic (to help absorb the the heat). Not sure if you will be growing on the floor or will be utilizing benches, but the black covering on the floor will help with trapping heat into the floor.

Aside from the floor, if you plan to have some sort of bench system in the GH, you also can utilize 55gal drums (also painted black) filled with water. Realize that the drums of water take up precious space in a GH, but could work well if you build your benches over the top of them! The drums of water will retain heat as well.

Another suggestion I can offer to you is dependent on how your GH will be constructed. The suggestion is to vertically line the perimeter of the GH with 2" thick Styrofoam. 2" thick and 2ft deep from the floor level down. Another similar method would be to provide a concrete foundation (2ft deep) for the GH to sit upon. Either will help your floor to retain more of the heat it absorbs. Some heat will escape the floor heat sink along the perimeter of the GH otherwise.

Other insulating ideas:
1) Dbl layer poly covering (inflated).
2) Styrofoam or other insulating materials used around the perimeter above the ground on the sidewalls and endwalls.
3) Or better still, a GH that is oriented east & west (the length of the GH) and then totally insulate the north wall. A GH that is oriented this way captures more light and heat than any other configuration.

Hope that helps!!!

---Dave

dsfin

Male Posts : 51
Join date : 2011-03-10
Age : 60
Location : Milton, WA; PNW - Zone 7-9

View user profile

Back to top Go down

Re: Green House Floor Insulation?

Post  Turan on 5/26/2012, 12:21 am

Marci

I live south of you in the Gallatin Valley. My greenhouse is not double walled and leaks like a sieve so I have not tryed to keep plants growing in it all winter. Other people do though. I have not heard them speak of insulating the floors, they plant in the floor. What these greenhouses have is a double film that has a fan that keeps the walls inflated, thus insulating a lot. Black barrels filled with water with boards across make great dual function plant benches. Planting in the floor for the winter are covered also with a thin floating row cover.



Check this out http://www.madisonfarmtofork.com/mf2f-geothermal-greenhouse.html
avatar
Turan

Female Posts : 2316
Join date : 2012-03-29
Location : Gallatin Valley, Montana, Intermountain zone 4

View user profile

Back to top Go down

Re: Green House Floor Insulation?

Post  Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum