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Draw a mansard roof or similar roof using a free mural.
Step 1 #
Set up the room. Select the wall where you want to place the mural in the navigation panel, and switch to wall view.
Step 2 #
Select in menu Room | Mural the free mural function. Draw a closing triangle. Doubleclick on the triangle to start free construction options.
Step 3 #
Select the diagonal line and click on the insert button (plus sign). A white bullet appears, drag it to the desired position. The other option could be to change the diagonal line to an arc or curve. Press enter to stop editing.

Step 4 #
Select de mural and copy – paste it. Rightclick to open the context menu and select mirror > X. Put the mural in the right corner.
Step 5 #
Go to floor view. Select the mural and set the thickness to the same dimension of the length of the wall.