Building A Workshop

Discussion in 'Technical Help' started by Cranker V2, Jan 2, 2015.

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  1. Ok, so I am going to build a workshop 1n the garden. Basic spec is 19m t&g, 3x2 cls and 19mm t&G floor. 20' x 12' with double doors and some single glazed units.

    Insulation wise I am thinking as follows: order outside to in

    Secondary glazing: Acrylic sheet(sealed with silicone)

    Walls and ceiling

    Waterproof membrane (tyvec etc) stapled to outer t&g
    air gap (20mm?)
    50mm celotex or similar
    waterproof membrane (DPM etc)
    OSB or ply

    Floor waterproof membrane
    19mm T&G
    Upvc interlocking floor tile

    consumer unit and lighting/power points

    Frost protection heater
    electric radiator
    Bar
    smart TV
    Sat TV
    Surround sound system

    Have I got the insulation order correct?
     
    #1 Cranker V2, Jan 2, 2015
  2. I went for 70mm thick log cabin double garage - much less fuss. Replaced the shit side door and window in the kit with a proper fire door and double glazing for security and dryness. Built in under 2 days on my own.
     
    #2 Exige, Jan 2, 2015
  3. I like the idea, but i am on a budget of around 3K for completion. 70mm log cabin would bust the budget I suspect
     
    #3 Cranker V2, Jan 2, 2015
  4. It will be worth the extra in the end :Happy: mine cost £7K about 7 years ago - kit was less than £5K, 6" concrete base pumped £1K, Electrics and new Side Door / Windows £1K
     
    #4 Exige, Jan 2, 2015
  5. Don't forget the air con..allow £1200 inc vat.
    Heats, dries and cools and 1\4 running cost of an electric fire..
     
    #5 AirCon, Jan 3, 2015
    • Like Like x 1
  6. 10-12m3 of concrete.. Wtf...how bigs the cabin?
    At 150mm thick that's 80m2!!

    OK slightly less if you include the cost of the steel reinforcing in the concrete price.
     
    #6 AirCon, Jan 3, 2015
    Last edited by a moderator: Jan 3, 2015
  7. bigger than my wallet if i want to do the manx gp next year with bradders,
     
    #7 Cranker V2, Jan 3, 2015
    • Disagree Disagree x 1
  8. Order is correct.
    Wpb is 100 times better than OSB, but 25% more expensive.
    Roof?
     
    #8 AirCon, Jan 3, 2015
  9. Yeah..get it right..do the Manx Gp..better use of Ducati dollars.
     
    #9 AirCon, Jan 3, 2015
  10. 19mm T&G, mineral felt
     
    #10 Cranker V2, Jan 3, 2015
  11. & pitch?
     
    #11 AirCon, Jan 3, 2015
  12. 20 degrees
     
    #12 Cranker V2, Jan 3, 2015
  13. Sorry I missed the 20 x 12.
    I assume its a shed style apex roof?
    Easier to make strong with less wood, or a flat but angled roof, easier to roof, but needs a strong support.
    Never use OSB on a roof, its not worth the saving.
    Use hardwood wpb 18mm.
    Paper layer, nailed. Aluminium roof nails.
    The torch on intermediate layer top to bottom and then top layer starting at lowest point, over lapping towards the top. I'll send links?
    Buy the felt from a roofing company... Not a wicks etc.
     
    #13 AirCon, Jan 3, 2015
    • Thanks Thanks x 1
  14. I love building these..just love it?
     
    #14 AirCon, Jan 3, 2015
  15. Advice gratefully received. I may even double skin the inside with 10mm plasterboaed.
     
    #15 Cranker V2, Jan 3, 2015
  16. Foil backed...and the ceiling.
    Thick stuff for the ceiling or it will bow.
     
    #16 AirCon, Jan 3, 2015
  17. foil backed, extras/part damaged from a clean room build. Roof - Felt, t&g, membrane, bubble foil, air gap, 50mm celotex
     
    #17 Cranker V2, Jan 3, 2015
  18. We've moved on now to fibreglass roofing.
    Steep learning curve...finally got it right.
    However the 16' square utility room roof would embarrass a boat builder..its near 2" thick.
    It took us a while to get the technique right
     
    #18 AirCon, Jan 3, 2015
  19. T&g wpb?
     
    #19 AirCon, Jan 3, 2015
  20. My house has a 9oz (I think) fibreglass roof.
     
    #20 Cranker V2, Jan 3, 2015
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