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Old 01-13-2011, 12:47 PM   #1
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Building a half (knee) wall to enclose loft area


I am trying to get some advice on what I should do to construct a half wall in my loft area. We are making it into a workout room and want more privacy. We may eventually make it into another bedroom. Any advice on what to do?

I was thinking I would just have to frame it out with 2x4's and attatch drywall to one side(since I don't have a ladder tall enough to attatch drywall on out side once frame is up), then attatch it to bottom plate and sides.
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Old 01-13-2011, 01:33 PM   #2
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Building a half (knee) wall to enclose loft area


you can build it like conventional framing with 2x4s then lay it down and apply drywall, tape, sand, prime and paint the outside lift it up and now you have the outside finished. Attach it to the floor and side walls and install drywall on opposite side as previous. Just make sure you have a drop cloth or some kind of covering on the floor for all the mess.

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Old 01-13-2011, 01:39 PM   #3
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Building a half (knee) wall to enclose loft area


The floor is carpet but there is a decorative wood panel at the bottom that the existing railing is attatched to. Do you think it would be ok to attatch the wall to this? Should I remove the texture from the side areas where I will be attatching it?
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Old 01-13-2011, 01:47 PM   #4
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Building a half (knee) wall to enclose loft area


You can drill right through the wood panel and into the existing floor. You dont have to remove the texture from the side areas because the drywall will butt up against the end walls. You can buy a trim piece looks like a U shape channel that you can put and each end of the drywall to cap it off.
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Old 01-13-2011, 04:20 PM   #5
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Building a half (knee) wall to enclose loft area


Thanks. I just left home depot where I priced some materials. Any idea what insulation I should put in the wall? There are so many choices!
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Old 01-13-2011, 04:25 PM   #6
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Building a half (knee) wall to enclose loft area


Judging by your photo, why do you need insulation? I would double up the top plate for rigidity.
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Old 01-13-2011, 06:45 PM   #7
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Building a half (knee) wall to enclose loft area


I was thinking I may need to insulate to make it more sound proof. Is it needed? I want it to be more private but not completely closed off.
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Old 01-13-2011, 06:47 PM   #8
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Building a half (knee) wall to enclose loft area


So double up the 2x4's at the top of the wall?
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Old 01-13-2011, 07:12 PM   #9
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Building a half (knee) wall to enclose loft area


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So double up the 2x4's at the top of the wall?
I would. How long is that span?
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Old 01-13-2011, 08:48 PM   #10
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Building a half (knee) wall to enclose loft area


Its 17.5ft across.
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Old 01-13-2011, 09:46 PM   #11
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Building a half (knee) wall to enclose loft area


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I was thinking I may need to insulate to make it more sound proof. Is it needed? I want it to be more private but not completely closed off.
You do not require insulation for that wall. As per sound proofing the wall is only a wall and you will still hear what ever noise is behind it. In order to make it sound proof you would have to build a whole wall and use something like quite batt, a high performance soundproofing insulation product. As for being private; well you now have a wall which is now drywalled and nobody can see you from down below.
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Old 01-13-2011, 09:54 PM   #12
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Building a half (knee) wall to enclose loft area


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So double up the 2x4's at the top of the wall?
Because of your span I would double up your top rail and overlap were they splice. Also when you drywall the wall you will have to finish it with a cap of some sort so this will also give you the rigidity you need and it will also be fastened to the end walls as well.

Just keep in mind that when you are building this wall and are ready to install it you would probably require 3-4 people to hold it in place while it’s being installed so it doesn’t fall over and crash to the main floor.
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Old 01-13-2011, 11:23 PM   #13
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Building a half (knee) wall to enclose loft area


Thank you for the advice, I am starting to envision a final product.
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Old 01-14-2011, 08:07 AM   #14
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Building a half (knee) wall to enclose loft area


Your going to need more than a double top plate to make that wall ridgid and keep the whole thing from falling off if someone leans against it. You need to either cut a hole and put a 4x4 down into your floor system med span or use 2 4X4 around 6 ft apart and get an htt 22 strap for the side and lag this into the floor with a 5/8 X 6 lag. Predrill the hole for the lag. This wall without a braced center will be a huge weeble wobble wall.

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