Next to the desired layer of the roof or floor in.
Revit roof thickness.
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In the value box of the structure property click edit.
Select the floor or roof.
For example a cad line with a 0 30mm thickness will be assigned to line weight 3 which is 0 35mm.
To create a dormer model required walls and additional roof.
Use it to extend the dormer roof to the main roof.
Revit has some great tools for creating and modifying roof overhangs.
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.
9 join roofs add opening to create dormer.
See hd version of video tutorial here.
The variable layer thickness parameter of roofs and floors affects the shape editing tools in the following ways.
Then follow these 2 steps.
It is always possible to customize the line weight of all imported cad layers.
In the edit assembly dialog specify the material for layers and the thickness of those layers.
Roof overhangs behave differently in revit when they are over different thicknesses of walls.
Use join unjoin roof tool.
This tool is located in the modify tab.
Download manufacturer approved bim content for roofs.
When there is no variable thickness layer the whole roof or floor slopes and maintains constant thickness between parallel top and bottom faces.
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On the properties palette click edit type.
The variable thickness parameter can be selected to modify the layer thickness of a roof or structural floor.
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.