How to join two walls together in Revit?

ByCADbrief Staff

Short Answer

Yes — in Autodesk Revit, you can join two walls together using the Modify wall-join controls at the wall end, which is the most common professional method for cleaning intersections and controlling corner conditions. This works best when the walls physically meet. It will not fix walls that do not actually touch.

What You Need to Know Before

Warning: revit wall joins can fail silently when wall ends are disallowed from joining or when the walls are slightly misaligned in plan or height. A common issue is thinking the walls intersect visually, while their base/top constraints or face locations prevent a true join.

How to Join Two Walls Together in Revit

  • Command: Modify

  • Shortcut: MV

  • Quick Steps:

    1. In the drawing area, select one of the walls, then click the wall-end grip/join control that appears at the end where the walls meet.
    2. If needed, right-click the join control and choose Allow Join; then drag the wall end so it snaps into the other wall.
    3. Click the join control again to cycle the cleanup condition, or use Ribbon > Modify | Walls > Geometry panel > Edit Wall Joins to set the correct join type.

Variables & Settings

  • Key Setting: Allow Join / Disallow Join at wall ends

  • Expert Setting: This wall-end option controls whether Revit cleans up intersecting wall geometry automatically. If Disallow Join is active on either wall end, the walls can touch but will not merge or clean correctly at the intersection.

Why it Fails

  • Cause 1 (Geometry): The two walls do not physically intersect because their endpoints, location lines, offsets, or vertical constraints do not align.
  • Cause 2 (layers/Locks): One wall may be pinned, attached, or constrained in a way that prevents you from extending it properly into the other wall.
  • Cause 3 (Command/Logic): The wall end is set to Disallow Join, or the selected join configuration in Edit Wall Joins does not support the cleanup you expect.

Quick Fix & Best Practice

  • Quick Fix: Select the wall end, right-click the grip, choose Allow Join, then use Edit Wall Joins to cycle the corner cleanup until the connection displays correctly.
  • Manager’s Verdict: Use standard wall joins for almost all architectural wall intersections. Avoid forcing joins when walls are intentionally separated by finish gaps, phasing differences, or detail-specific construction conditions.

FAQ

How do I know if a wall is set to disallow join in Revit?
Select the wall end grip, right-click it, and check whether Allow Join is available.

Can I join walls that are different types?
Yes, as long as the walls intersect properly and Revit can resolve the join geometry.

Why do my walls touch but still do not clean up?
One wall end may be disallowed from joining, or the walls may not align in height, offset, or exact endpoint location.

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