Greenhouse

Discussion in 'Builders' Talk' started by Seamybeag, Nov 9, 2018 at 11:54 AM.

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  1. Seamybeag

    Seamybeag New Member

    I'm going to build a greenhouse out the back! I'll pour strip foundation then block on flat then on edge for dwarf wall then fix timber frame and cover in either corrugated plastic or polycarbonate
    Should I use a 6 inch solids or is 4 enough?(for anchor bolts)
    Is there any need of a cavity or insulation?
    It's on a slope so I will step the foundation. I was going to put dpc under the frame and maybe a drainage channel on the high side to stop any water build up.
    Any and all advice /criticism would be highly appreciated
     
    Last edited: Nov 9, 2018 at 12:00 PM
  2. KIAB

    KIAB Well-Known Member

    Blocks 140mm/100mm,which to use depend on width of timber sole plate being used, do use a dpc under frame before fitting to blockwork.

    Can't see need for cavity wall being a green house, if was a conservatory then yes.

    Polycarbonate twin wall sheeting much stronger than corrugated sheeting.

    A lot of greenhouses use 4mm twin wall polycarbonate sheets,many advantages over glass.

    https://www.gardenbuildingsdirect.c...-a-polycarbonate-greenhouse-over-a-glass-one/
     
    Last edited: Nov 9, 2018 at 12:20 PM
  3. Seamybeag

    Seamybeag New Member

     
  4. Seamybeag

    Seamybeag New Member

    Thanks for that KIAB
    Was going to use pressure treated 4 by 2 sole plate and studs at 16 inch centers Hope to have foundation ready this weekend.
     
  5. KIAB

    KIAB Well-Known Member

    5x2 or larger would allow you to have a drip groove,plus a thin coat render on outside wall,
     
    Last edited: Nov 9, 2018 at 12:35 PM
    Seamybeag likes this.
  6. dobbie

    dobbie Well-Known Member

    Mosaix, Seamybeag and KIAB like this.
  7. KIAB

    KIAB Well-Known Member

  8. Seamybeag

    Seamybeag New Member

    Is that a flashing fitted over the sill or a groove cut out of the underside of 5 by 2?
     
  9. Seamybeag

    Seamybeag New Member

    Oh.. . I just saw it in the link
     
  10. KIAB

    KIAB Well-Known Member

    See Dobbie's link, will give the run off & drip groove to stop water running back onto wall, door frame/ window frame, it's the same princple.
     
    Last edited: Nov 9, 2018 at 1:21 PM
  11. Seamybeag

    Seamybeag New Member

  12. Seamybeag

    Seamybeag New Member

    Perfect Will keep you all posted as I progress
     
  13. Seamybeag

    Seamybeag New Member

  14. sospan

    sospan Well-Known Member

    For my 10 x 8 greenhouse, I levelled the site, put down municipal paving slabs and then placed concrete lintels on top of the slabs with a layer of cement.

    I then screwed the greenhouse frame directly into the lintels. I has withstood 80 mph winds on an elevated site with no problems
     
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  15. Seamybeag

    Seamybeag New Member

    Thanks for that Sospan Mine is quite elevated also and will be tested for sure!!!
     

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