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Construction of a DIY garden room

  • 04-02-2018 11:13pm
    #1
    RobAMerc
    Registered Users, Registered Users 2 Posts: 5,863 ✭✭✭


    So, folks were less than positive about my idea of insulating a shipping container for my garden room.

    I have therefore had a thought that I might try build it myself ( in stages )

    So, the site is the bottom end of the garden and not the driest spot, so it needs to be raised a little.

    My initial thought is:

    Dig 9 footing holes, and create footing piers.
    Frame out the floor using 150 * 44 lengths of treated wood
    Put rigid insulation between the joists - 100mm
    Floor it with OSB

    Frame out walls using 100 * 50
    Frame flat roof 150 * 44 - fit OSB deck
    Put OSB on outer walls and wrap with moisture barrier
    Fit doors and windows
    Insulate walls and ceiling with with 100mm rigid insulation
    Plasterboard inner walls and ceiling
    Clad the outside with ****** ( maybe cedar )
    Have the roof fiber glassed.

    So, my questions are:
    Will 100mm insulation all round be enough ?
    Is a pillar ( pile ) foundation ok, I really dont want the hassle of a concrete pad.
    Should I pitch the flat roof slightly ?
    Anything else I am clearly missing ?

    thanks


Comments

  • #2
    Gumbo
    Moderators, Society & Culture Moderators Posts: 41,588 Mod ✭✭✭✭Gumbo


    What will the area of the room be?
    What will the height be?
    How much garden space will you have left?
    That will answer your planning questions.

    With regards to the construction, by raising it off the ground, how will you seal the floor? Will the insulation in the floor be wasted by the massive void under it?


  • #3
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Check out ‘Walter segal’

    With timber in Ireland just make sure it’s properly treated


  • #4
    RobAMerc
    Registered Users, Registered Users 2 Posts: 5,863 ✭✭✭RobAMerc


    kceire wrote: »
    What will the area of the room be?
    What will the height be?
    How much garden space will you have left?
    That will answer your planning questions.

    With regards to the construction, by raising it off the ground, how will you seal the floor? Will the insulation in the floor be wasted by the massive void under it?

    I presumed we wouldn't need planning. It would be about 20sqm internally and would end up no higher than 3m at its highest point.

    As for the insulation, if I put insulation between the joists and osb over it won't it be sealed ?


  • #5
    jmBuildExt
    Registered Users, Registered Users 2 Posts: 692 ✭✭✭jmBuildExt


    Re concrete pads...
    Problem with them is they can be difficult to level relative to one another.

    You've probably seen the Irish Vervacular house build?
    https://www.irishvernacular.com/
    He uses pads like you are proposing.
    He creates the vertical frames on legs. The vertical pieces of timber run a variable distance past the bottom horizontal timber. The variable makes up for the pads being off level.
    Then the key is using a "Theodolite level and staff"to determine how long each leg should be to get the house level.
    Along with Walter Segal, have a look if you haven't seen it, you could take some inspiration. Everything there, plans etc all laid out very simply.


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