Different wall heights on each side of furnished attic

[meanwhile]

Hello! The left side wall of this attic bedroom is 10" higher than the right one in real life. How do I model this?

 

The length of the room is accurate, although I believe the peak/ridge of the roof is at least 5" taller (couldn't get a clean measurement).

 

The first floor ceiling heights are accurate, but the roof baseline height is somehow taller on the exterior.

 

Thanks!

Edited yesterday at 09:44 AM by meanwhile

[JiAngelo]

Create a room in that attic space that is 1" tall, no flat ceiling.  That should raise the left attic wall and raise the lower rafter soffit.

Edited yesterday at 11:37 AM by JiAngelo

[GeneDavis]

Raise the larger roof plane 10 inches?  Those rafters likely bear on a plate atop the floor frame.

[meanwhile]

Thanks for the tips! The 1" tall attic space room sadly caused some weird problems with split height roof planes.

 

I'm quite stumped, so here's a stripped down copy of the plan, as well as a couple of images below showing that +10″ taller wall from both sides of it.

 

Another possible missing piece of the puzzle – that side of the room seems to have a different ceiling pitch than the 45º of the other. My iPhone measured 42º, and a Klein digital angle finder measured 48º, so I'm stumped again. Both tools measure 45º on the other ceiling plane though.

 

It's a tricky one! You'll see a small corner overhang "patio" in the model that complicates it as well.

 

Would really appreciate any help on cracking this one.

 

Edited 5 hours ago by meanwhile

[JiAngelo]

Hello, I looked at your plan this morning.  My original method assumed you wanted this done with auto-roofs as much as possible based on the information you provided.  To that end, renaming the attic wall to bonus (for example) makes it a real room and Chief will automatically raise the rafters and this gives you pretty much what you wanted.  However, upon reviewing your plans, this creates a different problem that I will address later.

 

First, we need to address your pictures.  The room appears to be framed with 2x6 rafters. It also appears you are measuring your 10 inches to the roof sheathing, not from a 42" top of wall line.  In fact your 10" is derived by measuring below the double top plate down from the sheathing.  If those are 2x6 rafters, the ~7 1/4" plumb cut plus 3" top plates = 10 1/4" 

 

I overlayed these items on your cross section view.  Is this correct?  Is the other side framed with 2x12's to be at 3'6" or are those rafters furred to create a 3'6" measurement?  I don't have pictures of that side, so I can't tell.

 .  

 

Back to my original proposed solution, renaming the attic room to bonus (for example) makes it a real room and Chief will now build the rafters on top of this one inch wall.  Make sure the two end walls are gables, not hip.  Then change the left wall to an 11.45 : 12 pitch.  The result is 10 3/16", which is pretty close to what you original asked.  I would lower the room to 13/16" and you should be at 10" exactly.  However this doesn't match your pictures. 

 

And that porch with a hipped roof creates another problem.  One that I solved initially by extending the bonus room over the porch.  i can change the wall to a hip after I'm done with auto roofs.  However the gutters will never match up unless the heel is raised over those garage rafters.

 

Note, the model is missing some textures I don't have on my system.

Please review and let me know your thoughts..  

 

Edited 48 minutes ago by JiAngelo