Revit Tip: Face-Based Families for Flexible, Stable Placement in Revit

Create face-hosted families to maximize placement flexibility, maintain stability during design changes, and reduce rework across diverse host conditions.

• Why face-hosted
  • Place on almost any surface: walls, ceilings, floors, roofs, in-place masses, and many linked-model faces.
  • More resilient than strictly wall/ceiling-based families when hosts are edited, deleted, or replaced.
  • Ideal for sloped or irregular geometry where traditional host categories fall short.
  • Simplifies template libraries—one versatile family covers multiple host scenarios.
• Set up in the Family Editor
  • Start from a “Generic Model Face Based” (or the correct category’s face-based) template.
  • Define a clear insertion point with named Reference Planes; lock critical geometry to Reference Planes, not to host faces.
  • Use Always vertical only if the component must stay plumb; leave it unchecked for sloped-face placement.
  • Enable Cut with Voids When Loaded only when the family must cut its host; avoid unnecessary void cutting for performance.
  • Provide type vs. instance parameters thoughtfully; expose critical dimensions as instance parameters for on-site fit.
  • Add symbolic lines/masks for legible plan/reflective ceiling views and place geometry on Subcategories for V/G control.
• Placement and control tips
  • Use “Place on Face” for general placement; switch to “Place on Work Plane” for precise, level-based alignment.
  • For sloped roofs or complex façades, turn off Always vertical to align flush with the host surface.
  • Leverage Pick New Host to rehost quickly during redesigns; verify orientation flips (hand/face) post-rehost.
  • Coordinate cuts: where the family must cut host geometry, prefer native hosts over linked geometry to avoid surprises.
• Migrating existing content
  • Wall/ceiling-hosted content cannot be “converted” natively; rebuild critical components using a face-based template.
  • Standardize connector definitions (MEP), shared parameters, and subcategories to keep tags/schedules consistent.
  • For large libraries, consider Dynamo- or API-driven assistance to batch-transfer parameters and naming.
• QA and standards
  • Create a test project view set (plan, RCP, section, 3D) to validate cut behavior, visibility, and tagging before publishing families.
  • Use view filters to color-code face-hosted families by category for quick audits.
  • Document placement guidance in your BIM standards so teams know when to prefer face-hosted over host-specific families.

Pro tip: keep geometry lightweight, avoid unnecessary patterned faces, and use materials with appropriate detail levels to protect model performance.

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