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Shed roof question

  • 15-03-2012 4:48pm
    #1
    arse..biscuits
    Registered Users, Registered Users 2 Posts: 1,878 ✭✭✭


    I'm building a concrete shed/gym/man cave.
    I have the rafters in place and I'm going to slate the roof. I'm not sure about insulation. I dont want condensation forming and dripping on my stuff. Obviously I could insulate the roof but could I use some membrane that would stop condensation?
    I'm not concerned about the cold so I dont need insulation for that reason.

    Thanks in advance.


Comments

  • #2
    wayoutwest
    Registered Users, Registered Users 2 Posts: 509 ✭✭✭wayoutwest


    Are you going to put up roofing felt before fixing the batons?


  • #3
    Merch
    Closed Accounts Posts: 3,327 ✭✭✭Merch


    As per the other posters query, are you putting up a felt/membrane?
    You can pick up a roll of cheap membrane at a builder providers, felt might be heavier, I'd think and might be more difficult to put up.
    Whats the dimensions and what type of roof is it? you say slate, do you mean tile?
    I put a membrane across the beams under the battens on mine.
    Mine is was a simple apex, I recommend (I only figured it out after I did the first side) tack the membrane on one side, roll it across to the other, leaving whatever slack you need between beams (mine suggested in the instruction leaflet with it, not to go drum tight), then level it and tack the other end.
    If you try level it at each beam it will leave wrinkles and creases.


  • #4
    arse..biscuits
    Registered Users, Registered Users 2 Posts: 1,878 ✭✭✭arse..biscuits


    Some sort of membrane yeah,I was told a breathable membrane. Apex roof.

    I think I'm going to slate but I could still change to tile.


  • #5
    wayoutwest
    Registered Users, Registered Users 2 Posts: 509 ✭✭✭wayoutwest


    arse.biscuits - Yeah,breathable membane or old style roofing felt [cheaper but not breathable] tacked up wth felt nails,then battons on top.
    Are you sure that you won't be using any heating [other than yourself] in your man cave, like a plug in rad or a blower heater?


  • #6
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    go with the breathable membrane and then battern & cross batten above for slate/tile. then if you ever fancy installing insulation you don't need to worry about gaps under the felt to ventilate any condensation.

    regarding insulation - mineral wool insulation between rafters and an OSB board silicone sealed to the underside will take care of your vapour barrier and ceiling finish in one.


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