So I decided to build an underground coop: UPDATE pg 33

Discussion in 'Coop & Run - Design, Construction, & Maintenance' started by Oblio13, Oct 25, 2008.

  1. purr

    purr Chillin' With My Peeps

    Apr 30, 2008
    east freetown, ma
    what are you going to use as supports the roof sounds like its going to be quite heavy.
    can't wait to see it finished!!
     
  2. digitS'

    digitS' Chillin' With My Peeps

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    Quote:Yes, it is likely to be quite heavy. I've just been looking at some options for a flat roof and the material weights.

    Conventional flat top asphalt & gravel roofs weigh about 5.5 lbs/square foot.
    Loam soil planting mix weighs about 130 lbs/cubic foot.
    Peat and vermiculite planting mix weighs about 35 lbs/cubic foot.

    Perhaps, a full 12 inches of soil on the roof would not be necessary so those numbers could be halved.

    My biggest concern would be construction expense . . .

    Steve

    edited: sorry that's perlite not vermiculite in a 50/50 ratio with peat.
     
    Last edited: Oct 26, 2008
  3. Home on the Stead

    Home on the Stead Out Of The Brooder

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    You're building it similar to an old-style root cellar. That being the case, you'll probably want 12-24" of soil on top for insulation (and cooling in the summer).

    Don't know what your span is, and it sounds like you've been looking at loads, but a 2x10 or 2x12 with a taper at 12" on center should hold a load like that. But don't take my word on it, definitely do a load calc. To make it cheaper you could build more of a peak with standard roof construction and leave the soil off.

    Great Idea by the way - got me thinking where I might do that on our property. [​IMG]
     
  4. dlhunicorn

    dlhunicorn Human Encyclopedia

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  5. conroy

    conroy Chillin' With My Peeps

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    I'd love to see more pics!!! I think it's brilliant.
     
  6. miron28

    miron28 Chillin' With My Peeps

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    lenoir north carolina
    keep posting pictures i think this going to be great! [​IMG]
     
  7. BayCityBabe

    BayCityBabe Chillin' With My Peeps

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    Keep posting pics. I will try to post a photo of my friends' burm home. The southern face is the only part not buried, even their garage is in the burm. They have a wonderful perennial garden on the roof. Oh, and no problem with water. The entire home is elevated above a nearby nature preserve.
     
  8. Guitartists

    Guitartists Resistance is futile

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    Thank goodness for neighbors with large machinery! [​IMG] Do keep us updated!
     
  9. eggchel

    eggchel Overrun With Chickens Premium Member

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    Wow, what a great idea. I cant wait to see the finished coop. Nice of your neighbor to take pity on you and come over with his backhoe. Send him by my place, I need a pond.

    Chel
     
  10. Oblio13

    Oblio13 Chillin' With My Peeps

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    Quote:I haven't figured out the details yet, it's kind of taking shape as it goes along. The hole is now 10'x14', and I figure with the soil and potential snowload, it'll need to be built to hold 100 pounds per square foot. I'll ask the lumberyard to figure out what I need for a ten-foot span. If necessary, I'll put in a center support.

    It's become a neighborhood project - I bribed them with a boat ride to the pizza parlor:

    [​IMG]
     

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