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Raise ceiling height. Which method would you choose (if any)?

30K views 55 replies 16 participants last post by  GrahamL  
#1 ·
I have a client who wants to:
1) raise the ceiling on the first floor of a rancher;
2) add a second level

Raising the ceiling is the interesting part. In the end, I will have plans signed off on by a engineer, but I want to get some contractor opinion also. The main concern is the exterior walls as the interior walls will be reconfigured. Also, the exterior has brick cladding that the client will like to leave intact.
I didn't go into how to attach and anchor properly in each, but I'm curious about opinions there too.

A) Sister Studs
1) Remove drywall, electrical, plumbing, etc. from exterior walls.
2) Remove roof.
3) Cut 1.5" space in top plate next to each stud and insert longer stud in space next to original stud.
4) Nail longer stud to orignal stud and bottom plate.
5) Frame new top plate
6) Move on to second floor

B) Knee Wall
1) Remove roof
2) Attach 2' wall (plates and studs) to top of 8' wall to increase height.
3) Move on to second floor

C) LVL Beam
1) Remove roof
2) Attach LVL beam horizontally to top of 8' wall.
3) Move on to second floor

D) Crazy Method
1) Remove roof
2) Attach 12' wall (plates and studs) to top of 8' wall to increase height.
3) Move on to second floor by attaching band joists along the inside of the 12' wall, 2' up the 12' wall.

I have ordered them in order of my preference. I think (A) is the best way to go, but obviously the most work.
 
#13 ·
He found interior walls to run the waste lines down, just made it seem like a bigger issue than it was.

I'm sure there were some runs that may have been pieced together, I'll look later tonight and see if I have any pics. Like you, we left the brick facade and went from 8' to 9'

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#20 ·
Interesting. So with the inner wall being 10', I would still bring the original wall up to the same height, right? Maybe with the short extension wall or something.

The inner wall would be the structural wall, so the walls on the second level would offset since they would sit on the first level inner wall? Or would the second level walls need to be double also?
 
#28 ·
Leg-Thru to the bearing floor truss might solve the problem, if it's possible. A bearing leg would extend below the floor truss to the existing wall. May require some more that 3.5" to resist lateral loads, however you have 8" or so out to the face of the brick to strengthen the leg.

I'd call a truss manufacture and see if it's possible. Would solve a crap butt load of problems, save a lot of labor too.
 
#30 · (Edited)
1st. Picture: 2' tall LVL with joists hanging from it. I do not prefer this option.

2nd. Picture: Short wall or truss with floor joists hanging from a ledger board.

3rd. Picture: Balloon frame your new wall from the top of existing wall to bottom of new roof trusses. Hang floor/ceiling joists to height from either a ledger board or from vertical studs in layout. Add fire stop and blocking as necessary.

These options are still not great, but they reduce/ eliminate one hinge point on the wall. I'd still be concerned about movement and would want 9' interior partition walls to have lateral strapping to help reduce the exterior hinge.
Image


I think a couple of these are your listed options. I actually prefer the last option if you must keep existing wall.
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#36 ·
1st. Picture: 2' tall LVL with joists hanging from it. I do not prefer this option.

2nd. Picture: Short wall or truss with floor joists hanging from a ledger board.

3rd. Picture: Balloon frame your new wall from the top of existing wall to bottom of new roof trusses. Hang floor/ceiling joists to height from either a ledger board or from vertical studs in layout. Add fire stop and blocking as necessary.

These options are still not great, but they reduce/ eliminate one hinge point on the wall. I'd still be concerned about movement and would want 9' interior partition walls to have lateral strapping to help reduce the exterior hinge.
Image
View attachment 461826

I think a couple of these are your listed options. I actually prefer the last option if you must keep existing wall.
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Thanks for the drawings!
Yes, these are similar to the options I listed, but better executed. I also prefer the last option (my (D)), but I actually thought it would get me laughed out of the forum.
 
#33 ·
Couldn’t you do option 1 and sister new joists but only go as far as possible before hitting any plumbing? This is obviously not as strong as going from bottom plate to the new top plate but it eliminates the hinge effect and keeps you from having to rerun all the plumbing and electric on the exterior walls.