Urgent Improvements Needed for Curtain Walls: More Flexibility for Mullions, Machining, and Family Control

[gracielle_goncalves]

When will Revit finally take Curtain Wall upgrades seriously?

As a professional working with façade systems for years, I must express a growing frustration shared by many in the industry: Revit’s curtain wall system remains highly limited and outdated, especially when compared to competitors like Archicad.

It’s 2025, and we still can’t perform machining operations (holes, slots, notches) on mullions, nor treat them as fully independent, parametric families with multiple materials. Mullion geometry is still restricted to a single extruded profile with one material applied at the type level, making it impossible to represent technical or fabrication-level details.

➡️ In Archicad, mullions can be manipulated as true solid objects, with boolean operations and free modeling. In Revit, we are forced to rely on workarounds using generic families, nested components, or Dynamo scripts to achieve what should be native functionality.

We urge the development team to prioritize the following improvements:

1. Enable multiple materials within mullions, with per-region control.

2. Allow direct machining operations on mullions (cuts, voids, holes) inside the project environment.

3. Provide the option to convert mullions into separate, user-editable families, for advanced detailing.

4. Improve mullion join conditions, including mitering, chamfering, and custom vertical/horizontal junctions.

These are real-world needs for architects, engineers, and façade designers — and they’ve been overlooked for far too long.

Revit has made great strides in many areas, but the curtain wall toolset lags significantly behind. With strong community support and technical attention from Autodesk, this system can finally reach the level of flexibility that modern design and construction demand.

[Sleepingfish_Kuo]

Not only the Curtain Walls, door and window families should be upgrade together.

They are same objects in most of times. Think about how troublesome it is to change a 2x3 window into a 4x2, or to enlarge the lower part and turn it into a door panel — yet these operations are so much easier when using a curtain wall.

Just like this idea says.

https://forums.autodesk.com/t5/revit-ideas/window-and-door-creation/idi-p/13307903

[arq_42]

Yes, it's something they've had on their roadmap ("on radar") for a while, although they never say when they'll make any improvements, both to curtain walls and to stairs and railings.

These are tools that haven't seen any noticeable improvements since Autodesk acquired Revit.