Extending a Roof Plane Over a Bump-out


Reference Number: KB-00388
Last Modified: October 12, 2021

The information in this article applies to:

Home Designer Professional or Home Designer Architectural or Home Designer Suite



QUESTION

I have a bump-out in my plan, and I want the roof to extend down over the bump-out. How can I accomplish this task?   

Roof extending down over a small bumpout


ANSWER

A roof plane can extend over a bump-out. This can be done by changing the side walls of the bump-out to be Full Gable Walls and changing the front wall to use Extend Slope Downward setting.  


To create a basic plan with a bump-out

  1. Launch Home Designer and start a New Plan  using the default style template.


  2. Next, select Build> Wall> Straight Exterior  wall, and create a basic structure with a bump-out, as shown in the image below.

    Walls with a bumpout in floor plan view


  3. If the Auto Rebuild Roofs setting is not enabled, select Build> Roof> Build Roof from the menu and click OK.

    In Home Designer Pro, make sure to check Build Roof Planes.


  4. Select 3D> Create Camera View> Perspective Full Overview .

    In Home Designer Pro, navigate to 3D> Create Perspective View> Perspective Full Overview  instead.

    As we can see in the image below, the resulting roof is a hip over the bump-out area.

    Perspective full overview with a hip roof over the structure


  5. Select File> Close View to close the camera view and return to your floor plan.


To extend a roof plane down over a bump-out

  1. Using the Select Objects  tool, select the front wall of the bump-out, then click the Open Object  edit button.


  2. On the Roof panel of the Wall Specification dialog that opens, select Extend Slope Downward to extend the main structure's existing roof plane downward over the bump-out, instead of creating additional roof planes.

    Selecting Extend Slope Downward in the the Wall Specification dialog


  3. Click OK.


  4. Next, both of the two connecting walls that create the bump-out must be labeled as Full Gable Walls, as shown in the image below.

    Selecting Full Gable Wall in the Wall Specification dialog


  5. If the Auto Rebuild Roofs setting is not enabled, select Build> Roof> Build Roof from the menu and click OK.

    In Home Designer Pro, make sure to check Build Roof Planes.


  6. Select 3D> Create Camera View> Perspective Full Overview to see the results.

    In Home Designer Pro, navigate to 3D> Create Perspective View> Perspective Full Overview  instead.

    Perspective full overview showing the hip roof extending down over the bumpout

Now that you understand this process, you can take this knowledge and apply it to your own designs.