Slice Roof Revit

Select the floor to modify.
Slice roof revit. Create a void extrusion and make to required cut in the new construction phase apply the cut and done. Valid boundaries are highlighted. Use one of the opening tools to cut a vertical or perpendicular opening in a roof floor or ceiling for example to accommodate a chimney. Revit roof slope can seem complicated at first glance but by learning a few critical features you can create any roof shape you desire.
Click by face or vertical. Select a vertex edge face or point anywhere on the structural floor to start the split line. This should keep you existing roof in tact and show a cut in the new construction phase. Load the family into the project and place it.
After that you can click finish to execute the cut. Hope this is of assistance. You can use the add split line tool to add linear edges and to split the existing face of a roof or structural floor into smaller sub regions. The pick roof wall edges tool is active so that you can pick the boundaries that compose the dormer opening.
Place the cursor in the drawing area. Open the revit family with unattached voids and click create tab properties panel family category and parameters. Click modify floors tabshape editing paneladd split line. Whether you want a double gable roof with 6 pyramid shaped dormers or a simple gambrel roof the basics remain the same.
Start points and endpoints can be added anywhere on the face of. If anyone is still looking for a solution you can make a roof cut into an existing roof using component model in place. Create a sloped roof in revit step 1 draw your roof step 2 define the slope. Highlight the main roof on the building model and click to select it.
You can cut openings in the faces of these elements or you can select the entire element to make a vertical cut. Watch the status bar to be sure that you are highlighting the main roof. In the family category and parameters dialog select cut with voids when loaded and click ok.