First if your roof is at a 45 degree angle and at a slope of 1 4 over 12 you do not need to these steps.
Revit sloped roofs.
In sketch mode select a roof boundary line that defines slope indicated by.
Revit roof slope can seem complicated at first glance but by learning a few critical features you can create any roof shape you desire.
Change the slope angle of the roof.
First make sure that your main roof is all one big roof.
Want a sloped structure or a sloped insulation in your flat roof.
This video demonstrates the following.
The insulation thickness must be at least as thick as the vertical slope else you will receive a warning.
By default the whole roof will be sloped.
Use sloped edges or a slope arrow on a roof to create sloped roof elements.
8 set variable material for sloped insulation.
Check variable material in the roof structure to create sloped insulation.
How to modify roofs at sub elements.
To specify roof pitch select a slope defining boundary line click the numeric slope definition.
Use a slope arrow to define the slope.
You do not need to have to trinagle slopes but just one with two slopes defined.
This video was recorded using revit 2012.
Creating complex sloping roofs in revit 2014 roof junctions controlling roof slopes and levels.
On the properties palette select or clear defines roof slope.
Whether you want a double gable roof with 6 pyramid shaped dormers or a simple gambrel roof the basics remain the same.
Define a sloped edge to a sketch line.
Sloped edges on a roof sketch line create a sloped roof.
Create a roof slope using the defines slope property by applying the defines slope property to lines of a roof boundary you can create different roof types including flat roofs gable roofs and hip roofs.
This video covers how to create a flat roof in revit that contains slopes for roof drainage.
In addition if you have a surface that is sloping in two directions refrence the end of the video.
Create a roof slope using slope arrows use slope arrows to define slopes on a roof such as a 4 sided gable roof.