Monday, November 13, 2017

Revit Floor Finish Workflow - Thin Floors

Type Selector showing several floor finish elements
A level’s primary floor does not have a good way to host multiple floor finishes—and when the floor is coming from a linked structural model it is not possible at all. One solution is to use a thin floor element sitting on top of the main/structural floor.

This post follows up on a previous post, where using the technique discussed in this post incorrectly can cause issues. Read about that here: How Did the Interior Designer make MEP Spaces Disappear?

The concept is pretty simple, but here are a few things...
to consider:
  • Use a common prefix such as: Finish Floor – RF2, Finish Floor – CT1
        o This will group them in the Type Selector,
            separating them from the structural floors
  • Apply a View Filter to other views
        o Hide the floor in the architectural and code plans, elevations, etc.
        o Leverage the common prefix element name
  • Remember to offset the finish floor up after placing each instance
        o It should be moved up the same as the thickness of the finish floor
        o For simplicity, consider making all the finish floors a consistent
          thickness, such as 1/8” (25.4mm)
  • Uncheck Room Bounding
        o We don’t want these floors affecting the size of the Room element, which in
            turn can cause problems in the MEP model with Spaces
        o Unfortunately, this has to be unchecked for each element as it is an Instance
            Parameter that cannot be pre-set
        o Doing this will also avoid issues with Revit's energy modeling workflow
  • Modify door families if needed
        o In some door families, the 2D swing lines may be hidden by the floor finish element.
        o In the door family, these lines can be moved up to a higher reference plane, so they
            are above the floor finish
  • Floor finish schedule filtered by floor name prefix

Separate “thin” floor over 101.6mm structural floor element

My book, Interior Design Using Autodesk Revit 2018 covers this technique and the following images are based on the model created by the reader working though it. These images were created using Enscape.


  1. Great post with some really good tips. We use this workflow as well but I have a question. Is there a reason you don't offset the slab down so that the top of finish floor align accurately to the level?

  2. Thanks Luke, glad you liked the post. The floor finish technically would be above the structural floor/slab. Plus, when it is linked, you cannot join the two floors, so the top surface would be messy in 3D, renderings and worse - VR.

  3. Very straightforward, really good indeed!
    But I also have a doubt. When you say "A level’s primary floor does not have a good way to host multiple floor finishes", would the "bad" way be using parts? What's your opinion about them?


  4. Hi Raquel, Thanks for the comment. Yes, I think "bad" would be using Parts or Split Face as they are not dependable while things are changing. Plus, it is not possible to split the face of a linked floor. Parts are meant for something different, so using them for floor finishes could cause issues.

  5. Dan, my solution on the same aspect is to always have a the finish floor have a structure zone, the space where the struc slab would be. The engineer has the floor offset (- neg) to allow the arch floor to be at FFL and allow single levels, not multiple for different disciplines. Copy Monitor is facilitated. Then if the Structural Model is not visible the floor has the correct thickness. I found people lose sight of the U/s Slab and have had all sorts of poor connections etc. I agree with parts unless I own the element entirely.


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