Case Study#3 Part A: A modular facade in Revit


We are working on a project where the facade will be a prefabricated modular facade, where the  modules will arrive at the construction yard ready to be mounted on to the slabs. Since the modules contains everything from exterior cladding, exterior shading,  insulation, interior wall cladding, there will be no need to do anything more with the facade after every module have been mounted.

The reduced construction time at the construction yard is one of the reason it is getting more and more popular with prefabricated modular facades. It is also getting increasingly popular because of reduced cost and increased precision.


There are many ways of modeling a modular facade in Revit, and it varies from project to project. In this project I have used a lot of Curtain Walls and Groups, which has some pros and cons. I will divide this Case Studie in multiple parts, where this part will cover the general principles of model with groups.


 The width of each module is 2400 mm and the height is in 3800 mm. This will give the facade a modular grid. You should try to have as few types of modules as possible since the amount of different modules usually will have a cost effect. Sometimes you have to balance the amount of different types of modules with the amount of flexibility. But not always. This is specially important in the early stages of the project, because if you can’t keep it simple in the start you may end up with a to «complex» end result.


Every module type is one group. so if you have 10 different types of modules you will have 10 different types of groups. Some tips using groups:

  • Keep the amount of groups down to a minimum. The illustration above shows you that in the finale phase of your project, you will have many different groups. . The more groups you have, the more you have to maintain. BUT, you should never stop doing what you want to do with your project because you don’t want to make more groups…
  • Group origin. One of great thing of using groups, is that you can change one group with another to test different concepts. To be able to do this, every group has to have the same group origin
  • Disallow join. The groups are going to be stacked together, and you don’t want your walls within a group to  magically join with the neighbor group. Therefor,disallow join as much as possible
  • How to keep track of your groups. Check this blog to get you started: It’s not a perfect solution but it works



In this facade I almost only uses Curtain Walls with different Curtain Wall Panels and Mullions. I will explain this in depth in my next blog post.


Remember, all the hard work you are using modeling your facade in 3D, you will be able to harvest directly from your model to production drawings. And that is a great feeling!

Stay tuned for part 2!