To construct a flat roof you must toggle the slope defining line see step 3.
Low slope roof in revit.
The tail is the low point and the head is the high point.
Flat roof in revit this one is very straightforward.
To specify roof pitch select a slope defining boundary line click the numeric slope definition.
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.
In sketch mode select a roof boundary line that defines slope indicated by.
Low slope roofs are often referred to as flat roofs.
The roof system is defined as the roof membrane including surfacing and the roof insulation.
Revit will issue a warning when a slope significantly deviates from the expected thickness.
The second option in the list is toggle slope defining.
The insulation thickness must be at least as thick as the vertical slope else you will receive a warning.
Roof assemblies with a pitch slope of less than 3 12 are considered low slope roofs.
Select the lines of the roof outline and right click over the line.
When in the roof by footprint sketch mode select all of your newly created boundaries and turn off the defines slope parameter.
Draw the arrow then click it and change the properties to select the right levels and offsets.
By default the whole roof will be sloped.
On the properties palette select or clear defines roof slope.
For a low slope roof you can change these to inch rise to 12 inch run by clicking the roof outline and replacing the slope dimensions.
Want a sloped structure or a sloped insulation in your flat roof.
Finish the sketch by pressing the green tick and you will not have a completely flat roof surface in your revit model.
This create an uni directional slope parallel to the arrow.
In order to enable shape editing tools the following conditions must be met.
Check variable material in the roof structure to create sloped insulation.
The roof assembly is defined as the roof deck along with the roof membrane and roof insulation.
8 set variable material for sloped insulation.
See hd version of video tutorial here.