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Foundation depth for a shed / granny flat built with cavities??

  • 26-08-2015 03:40PM
    #1
    Danye
    Registered Users, Registered Users 2 Posts: 2,233 ✭✭✭


    Hi folks,

    If you were to build a single storey shed / granny flat with cavity blocks and a flat roof what depth would you look to have your foundations at? Somebody said 300mm but I don't think that's deep enough. I'm open to correction though.

    Thanks.


Comments

  • #2
    sydthebeat
    Subscribers Posts: 42,643 ✭✭✭✭sydthebeat


    the foundations must suit the site conditions... ie its totally dependent on the soil type and topography

    no one can answer that here


  • #3
    Strolling Bones
    Registered Users, Registered Users 2 Posts: 615 ✭✭✭Strolling Bones


    except that "somebody" is very wrong. 300mm is waaaay too shallow


  • #4
    Gumbo
    Moderators, Society & Culture Moderators Posts: 41,706 Mod ✭✭✭✭Gumbo


    Danye wrote: »
    Hi folks,

    If you were to build a single storey shed / granny flat with cavity blocks and a flat roof what depth would you look to have your foundations at? Somebody said 300mm but I don't think that's deep enough. I'm open to correction though.

    Thanks.

    A shed and granny flat are two totally separate entities. One is a structure exempt from the building regulations and one is a habitable structure that requires planning permission and to comply with the full rigours of the current Building Regulations for extensions.

    Who is certifying the works?


  • #5
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Danye wrote: »
    Hi folks,

    If you were to build a single storey shed / granny flat with cavity blocks and a flat roof what depth would you look to have your foundations at? Somebody said 300mm but I don't think that's deep enough. I'm open to correction though.

    Thanks.

    We can't offer structural advice. Thread closed


This discussion has been closed.
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