When there is no variable thickness layer the whole roof or floor slopes and maintains constant thickness between parallel top and bottom faces.
Revit roof thickness.
Use it to extend the dormer roof to the main roof.
In the edit assembly dialog specify the material for layers and the thickness of those layers.
Select the floor or roof.
The variable thickness parameter can be selected to modify the layer thickness of a roof or structural floor.
For example a cad line with a 0 30mm thickness will be assigned to line weight 3 which is 0 35mm.
Roof overhangs behave differently in revit when they are over different thicknesses of walls.
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Revit roof tip 9 join roofs add opening to create dormer duration.
I then drew a second roof with a 7 1 2 thickness on the inside of the first by using pick walls with extend into wall.
Then follow these 2 steps.
Download manufacturer approved bim content for roofs.
Next to the desired layer of the roof or floor in.
Discover free revit bim objects for roofs.
9 join roofs add opening to create dormer.
To create a dormer model required walls and additional roof.
When revit import such a file it will match the thickness of the cad line to the closest value inside your revit line weight setting.
In the value box of the structure property click edit.
See hd version of video tutorial here.
It is always possible to customize the line weight of all imported cad layers.
Mix play all mix revit pure youtube.
On the properties palette click edit type.
Use join unjoin roof tool.
Primary among these tools is the pick walls tool.