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  1. #1
    New Member
    Join Date
    Mar 2012
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    20
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    Coastal Maine
    Tractor
    Kubota B3300

    Default Shed roof garage addition

    I'm planning a shed roof addition to our saltbox garage--about 15 x 30, gravel floor, pole or pier-and-post construction, attached to the back of the garage, pitched roof to pitched roof, to house my new kubota B3300--and I have a few questions: 1.) Do I need to remove the sod, or can I simply lay a moisture barrier and the gravel over the sod? Assuming the sod must go, how thick should the gravel layer be in Maine? 2.) Can I dig holes for the poles or piers with my new backhoe, or should I buy or rent a posthole digger? What would be the technique with the backhoe--will it dig a hole with a 16" bucket straight down to, say, four feet? 3.) Are 4x4's sufficient for this addition as it will be attached to the garage roof and supported by 8 posts, or should I use 6x6's? Thanks for the advice.

  2. #2
    Super Member clemsonfor's Avatar
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    Sep 2009
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    6,254
    Location
    Greenwood Co., SC
    Tractor
    Yanmar YM2000

    Default Re: Shed roof garage addition

    Quote Originally Posted by Ugarte View Post
    I'm planning a shed roof addition to our saltbox garage--about 15 x 30, gravel floor, pole or pier-and-post construction, attached to the back of the garage, pitched roof to pitched roof, to house my new kubota B3300--and I have a few questions: 1.) Do I need to remove the sod, or can I simply lay a moisture barrier and the gravel over the sod? Assuming the sod must go, how thick should the gravel layer be in Maine? 2.) Can I dig holes for the poles or piers with my new backhoe, or should I buy or rent a posthole digger? What would be the technique with the backhoe--will it dig a hole with a 16" bucket straight down to, say, four feet? 3.) Are 4x4's sufficient for this addition as it will be attached to the garage roof and supported by 8 posts, or should I use 6x6's? Thanks for the advice.
    The 4x4s should be fine, especially if you use tin, but even with shingle weight i feel thats plenty. I would not dig with a back hoe, the ground around will be all loose and not compacted as if you dug a post hole, around the hole the post will go in.

    Why would you put a moisture barrior down for gravel? I would just put the gravel if you want gravel and then spray roundup (glyphosate) to kill what grows through it.
    YM2000. MF dirt scoop,4' Jbar bushhog,boompole, LMC 12-16 disk harrow, 4' Atlas boxblade (with rippers). 1980 chevy K10,1990 ford ranger 2wd (285K miles),1997 saturn SL2 (twin cam!!),2001Toyota Higlander
    1986 Cobia 177 sunskiff w/1981 Johnson 60 hp
    1991 Javalen 17ft w/same year 150 Johnson GT
    Troybuilt 4 cycle & Echo 2 stroke,cold natured(need carb rebuild),MS390 Stihl, Northern tool pressure washer, mixes water into the oil in the pump(now dead, motor on a tiller). 5000 watt generator.

  3. #3
    Platinum Member
    Join Date
    Sep 2010
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    688
    Location
    Eastern Ontario
    Tractor
    Kubota MX5100

    Default Re: Shed roof garage addition

    Well you're likely to get different responses from different people. Personally, I would remove the sod and dig down whatever is required to get rid of at least the topsoil. I would then fit and pack with gravel and top with '3/4 less' and pack. As for the 4x4's, 15x30 is a large area with a shed roof and snow load. I would prefer 6x6 with at least 2"x8" girders. Digging with your BH will work fine. It is difficult however to get a small hole dug with a BH compared to an posthole digger but I used my BH on all the piers for my garage.
    2011 Kubota MX5100, BH92, BH BB72, Walco Bush Hog and Snowblower, Wallenstein 310 Splitter & Forks

  4. #4
    Super Member clemsonfor's Avatar
    Join Date
    Sep 2009
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    6,254
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    Greenwood Co., SC
    Tractor
    Yanmar YM2000

    Default Re: Shed roof garage addition

    Sorry i dont even consider snow down here!! I did get as heavy as a snow as we probly will ever get last year no prob on my shed though.
    YM2000. MF dirt scoop,4' Jbar bushhog,boompole, LMC 12-16 disk harrow, 4' Atlas boxblade (with rippers). 1980 chevy K10,1990 ford ranger 2wd (285K miles),1997 saturn SL2 (twin cam!!),2001Toyota Higlander
    1986 Cobia 177 sunskiff w/1981 Johnson 60 hp
    1991 Javalen 17ft w/same year 150 Johnson GT
    Troybuilt 4 cycle & Echo 2 stroke,cold natured(need carb rebuild),MS390 Stihl, Northern tool pressure washer, mixes water into the oil in the pump(now dead, motor on a tiller). 5000 watt generator.

  5. #5
    Gold Member bearcreek paul's Avatar
    Join Date
    Nov 2010
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    296
    Location
    by wilkes barre pa
    Tractor
    mitsubishi mt16fd

    Default

    I put a shed up last year about the size your planing.Went with 4x6's post and 2 x6's for the rafters 16 in on center.Used 2x10's to hang the rafters.No problem with the snow load even thought we only had 2 good snows.I live in Pa in the Poconos so not as much snow as you get.Here are some pictures.
    Attached Thumbnails Attached Thumbnails -image-3074739194-jpg   -image-3880358303-jpg   -image-718736495-jpg  

  6. #6
    Elite Member 300UGUY's Avatar
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    Apr 2004
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    3,335
    Location
    Howell, Michigan
    Tractor
    Kubota L3400, Farmall H

    Default Re: Shed roof garage addition

    Quote Originally Posted by clemsonfor View Post
    Sorry i dont even consider snow down here!! I did get as heavy as a snow as we probly will ever get last year no prob on my shed though.
    We had a foot of wet snow a couple years ago, it took down several old barns around here.

  7. #7
    New Member
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    Mar 2012
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    20
    Location
    Coastal Maine
    Tractor
    Kubota B3300

    Default Re: Shed roof garage addition

    Thanks for the replies and cautions. I'll definitely keep the snow load factor in mind.

  8. #8
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
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    16,449
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: Shed roof garage addition

    I would kill the grass and then put plastic down and put about 4 in of rock ,gravel, or whatever. You could pour some cement later if desired.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

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