Sign in to follow this  

lock roof ridge height

Recommended Posts


I had no idea there was a forum.  this is great!  I have one question for any knowledgeable experts out there!  

is there a way to use auto roof planes & lock all the top heights of the roof ridges so that they all match?  I've been working on my house plan for a few months now & have created manual roof planes to do what I am kind of after, but it is a real pia when a wall needs bumped out or something is revised.  all the rooms are set to the same height, yet it generates roof planes all over the place [height wise].. I've had better results with baseline polyline manipulation, but still left with the same issue.  I want to check a box that says "lock all full gable ridge heights" & let the pitch be the variable.  basically I want full gable ridges 1,2&3 to all be the same height and span the main 3 structures of the house. but when I generate auto roofs, its a mess!  

I also need gable 3 to slope over the porch at a lower pitch and join with gable 1- auto roof bones a hip over porch, if I change the roof group of the octagon nook it gets even wilder!

rocking with CA premier x12 

thanks in advance! :)

manual roof planes.PNG

auto roof planes.PNG

auto roof plane view 2.PNG

manual roof plane view 2.PNG

Share this post

Link to post
Share on other sites

Sorry to let your hopes down but there is no "automatic" way to do this. Here is why: Roof systems are determined by the geometry of the floor plan against the pitch you assigned to roofs. Roofs bear on usually parallel walls, the distance between those pairs of walls ALONE determines the resulting ridge height between them.


The "good news" is that you can do this manually by methodically raising, manually, the ridges so they match BUT then those manually edited roof planes will then have differing plate heights as a result. 


If this is unwelcome news you can blame Euclid as he is said to have invented the subject.





Share this post

Link to post
Share on other sites


thank you for the quick reply.  that makes sense.  I have three different width sections coming together.  if I can ask you-- from a building standpoint, is it impractical to build a varying pitch house to achieve an even ridge line elevation?  

Share this post

Link to post
Share on other sites

Yes, a waste of time in IMHO.

Instead of having same height fascia/plates, same overhangs, etc, you will have to make compromises as some will be different and therefore making it more difficult to build - apart from the above, you will end up with bastard valleys and/or hips.

Apart from all that, the roof as a whole will look better with the same pitch and different ridge heights.

The only exceptions I would make would be to increase the pitch on a gable roof where it is a feature like over an entry way, patio, deck, cathedral ceiling, etc., but not to make the ridges the same height. 


  • Upvote 2

Share this post

Link to post
Share on other sites

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now
Sign in to follow this  

  • Member Statistics

    Total Members
    Most Online
    Newest Member
  • Similar Content

    • By ChiefWhataChuck
      Civil engineer asked for roof plan. Currently. I have been able to display roof plains by floor level with slope markers. However, being it is a two level do I display a complete roof for a layout plan? Along with dimensions for roof rain displacement calculation?
    • By JamesKCI
      Hey all,
      Sorry for the slight tongue-twister of a title. I'm here with another novice question.
      When creating roof plans to send to layout, I'm running into an issue. After I choose to display all of my roof planes on the same level, they appear as though the program is deliberately displaying the lower roof planes on top of those that should be above. I've attached a couple snips showing an example of how one of my roof plans is drafted and another two with what that plan looks like in plan view. It's in the roof plan view but it looks the same regardless of the layer set I use.
      Much Obliged

    • By mborean
      A lot of my work involves trussed roofs.  After building the trusses, I frame the roof for the facia and varge rafters.  Problem with this is that CA adds ridge boards that don't exist in trussed roofs.  There doesn't seem to be a way to frame without ridge boards or to set the ridge board dimensions at 0.  If there is a work around, I'd love to hear it.
      Also....  Is there a way to frame a roof where one roof California or over frames over another roof.  In my previous CAD, I could trim the bottom of one roof to the top of another and the framing acted accordingly.  This program even added a valley plate on top of the lower roof and below the rafters of the upper roof.  That may be too much to ask for, but one can only  hope.
      Love to hear what y'all have to say.
      Thanks in advance.
    • By RenoByDesign
      When I'm building my roof, I put in a dimension for my roof overhang and it doesn't matter what number I put in the dialog box, it only draws it at 20" deep. What am I doing wrong? I need to fix this so I can draw my roof lines correctly and send out for a roofing quote. I am using Chief Architect Premier X12.
      Thank you, Melissa