Help constructing a complicated roof

[shirleloshem]

Hello,

 

I'm using Home Designer Pro 2025, and have a fairly complicated roof. Every time I've tried to model it, I've ended up with something broken.

 

The main difficulty is that, in only part of the house, there's a cathedral ceiling that connects with the wall about 3ft off the ground.

 

Here's what it looks like from the top — I've marked the area that has a "normal" ceiling, and everything else is vaulted.
https://imgur.com/Xbnd3Gt https://imgur.com/Xbnd3Gt

Here's another perspective from the outside: https://imgur.com/y2XcjiW

And some indoor pictures of the room circled in the first pic: https://imgur.com/UvOJJCy https://imgur.com/am9oFV3  https://imgur.com/2unH97I

to illustrate what I mean.

 

The main reason I care about modeling this correctly is to get the walls and skylights right and be able to plan furniture/renovation.

 

I'd appreciate any help anyone could offer! I've looked extensively at instruction videos, but could not find anything that seemed to show how to construct this type of roof, either in chief or HD.

 

Thanks!

[GeneDavis]

Can't be that old.  Just get the plans used to build it.

 

What's that funky triangular section at the inside corner near plan left down?

[JiAngelo]

The walls are closer to 4' off the ground based on the switch distance to floor and angled wall distance to floor. 

 

If the roof is 12/12, and the ceiling plane is 8' draw another wall 4' inside the bedroom, and make this wall invisible and 12/12 pitch for roof.  open the new smaller room and set default ceiling height to 4' and uncheck flat ceiling.  If you did it right, the 4' walls roof plane will extend up and past the 8' walls roof plane.  Your interior picture gives the contextual clues.   

The dotted lines are the invisible 8' wall location.

It looks like your witches hat is then 10'  ceilings.  Its why you see half the roof triangle eave (below 8'), and not the other half (above 8') (see green arrows below.).  

It might be easier to draw the witches hat as an 8' tall room, the on the 3rd floor draw it again open below, 1' tall walls (2' including the floor = 10' overall)  Set all witches hat walls to 12/12 pitch and maybe roof group 2 if it is fighting with the original roof.

 

Unfortunately I'm not using Home Designer.

[GeneDavis]

@shirleloshem this forum is for users of Chief Architect Premiere users.  Users of Home Designer have their own site.  You might want to repost this roof issue topic there.