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mattt 01-04-2012 01:57 PM

raising shed roof pitch
i want to add 4 ft of height to an existing wall to put a shed pitch roof on the structure. how do i tie this 4ft kneewall into the existing wall so it doesn't act like a hinge when the shed rafters go up?

abracaboom 01-05-2012 04:55 AM

That wouldn't be called a kneewall, but an afterthought.

Nail full length (full height) studs to both the upper and lower walls.

mattt 01-05-2012 08:29 AM

I was hoping to avoid tearing into the already finished wall-- thus not being able to run full length studs up to tie into the 4 ft added height. Any thoughts?

titanoman 01-05-2012 09:08 AM

The rafters won't let the "knee wall" "hinge". You will be fine.
Edit: I am wrong. That will be a bouncy wall unless you put joists in it. Are you after more head-room or a higher pitch for shingles/water shedding?

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mattt 01-05-2012 11:21 AM

just trying to match the roof line of the rest of the house.Also, the ceiling will now be cathedral(thus the reason for the shed pitch)

titanoman 01-05-2012 11:24 AM

You can get away with a pony wall if you run a couple joists to tie in the "hinge" point. But you already know that.

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tinner666 01-05-2012 03:17 PM

Run collar ties about 4' long. It'll give you about 2-1/2' or so of flat ceiling at the upper end. Put your can or track lights there too if your want.

(The collar ties shoud run from all the way inside your 4' wall and the longest point should be right at the roof sheathing.)

titanoman 01-05-2012 03:34 PM

Is there going to be any sheathing on the outside that you can run 8 footers from the top down? That would really stiffen things up.

mattt 01-05-2012 04:35 PM

Thanks for the responses! The 4ft collar tie idea would look good and work too-- but the ceiling' had to' match, just decided to tear into the wall instead and run full studs at intervals.. the can of worms is open. Thanks again.........

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