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    bat840's Avatar
    bat840 Posts: 1, Reputation: 1
    New Member
     
    #1

    Mar 31, 2008, 06:51 PM
    Attic Floor Joists
    Wondering if anyone knows what is recommended for floor joists when developing an attic? My existing ceiling rafter is 2x6 so I will need to sister another joist in, what size... 2x10??
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
     
    #2

    Mar 31, 2008, 07:51 PM
    It all depends on the span of the joist.
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
     
    #3

    Apr 2, 2008, 08:37 AM
    2x10 is now the recommended size of a new roof rafter, floor joists are 2x12 but span does play a part.

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