Creating a Cross Gable Roof

Reference Number: KB-01043
Last Modified: August 27, 2019

The information in this article applies to:

Home Designer Professional or Home Designer Architectural or Home Designer Suite or Home Designer Interiors or Home Designer Essentials


I would like to create a cross gable roof of my structure where the roof ridges meet.  How can I accomplish this task in Home Designer?

Camera view of a house with a cross gable roof


Creating a cross gable roof is easy to accomplish using the Roof panel of the Wall Specification dialog in conjunction with the Build Roof tool.

To create a cross gable

  1. First, launch your Home Designer program and select File> New Plan .

  2. Select Build> Wall> Straight Exterior Wall  and create a basic structure, similar to the image below. 

    Floor plan view of house with 20’ ends East and West and 10’ ends North and South

  3. Using the Select Objects  tool, select the topmost wall, and click on the Open Object  edit button to display its Wall Specification dialog.

  4. Select the Roof panel, then choose Full Gable Wall, and click OK

    Wall Specification dialog with Full Gab le Wall specified on the Roof panel

  5. Repeat this process for the left, right and bottom walls, indicated in the image below with solid blue wall hatching until all four walls have been specified as Full Gable Wall.

    Floor plan view showing four blue walls at the far ends of the house 

Now that you have defined your Full Gable Walls, to create a gable end over the selected walls, build the roof to see the results to this point.

To build a roof

  1. Select Build> Roof> Build Roof  to display the Build Roof dialog.

  2. Specify the Pitch for the wider section of the structure.  

    Build Roof dialog showing 6” in 12” as the Pitch 

    For the purposes of our example, specify a pitch of 6 in 12.

  3. Click OK to build the Roof.

  4. Take a 3D Full Camera  view to see your progress.

    Camera view of house with roof built 

Now you can see that your gable ends have been created where you want them, however, it is clear that the default pitch of 6/12 is not going to allow for the thinner portion of the structure to meet up with the wider portion's ridge height.

As you have already specified a gable end for this thinner part of your cross gable, you will need to increase the pitch from the default for its side walls to allow it to meet at the center.

To adjust the pitch on a wall-by-wall basis

  1. Return to your 2D floor plan view.

  2. Using the Select Objects  tool, select one of the four walls indicated with orange wall hatching in the image below.

    Floor plan view showing the four side walls of the North and South ends of the house in Orange

  3. Once you have selected one of these walls, click on the Open Object  edit button to display its Wall Specification dialog.

  4. On the Roof section, enter the desired value of the Pitch. Replace it with a higher value.

     Wall Specification dialog showing a Pitch of 12” in 12”

    For the purposes of this example, increase the Pitch to 12".

  5. Repeat this process for each one of the remaining orange hatched walls indicated in the image.

    If you have Auto Rebuild Roofs* checked in the Build Roof dialog, you will notice these changes take place as you go wall by wall through the plan. 

    If you do not have Auto Rebuild Roofs* checked, then you will need to return to the Build Roof dialog to rebuild your roof after changing all of the indicated walls in your plan (*Auto Rebuild Roofs not available in Home Designer Essentials.)

  6. Finally, take a 3D Full Camera  view to see the results.

    Camera view of house with roof built 

With a basic understanding of these principles, you can apply them to your own designs.  Keep in mind that you may need to adjust the Pitch of the cross gables more than once to get their ridges to align perfectly with the main roof ridge.