Revit Tip: Revit Clash Detection and Coordination Workflow

Detecting model clashes early is one of the most effective ways to protect a Revit project’s schedule, budget, and constructability. A disciplined clash-detection workflow turns coordination from a reactive cleanup exercise into a repeatable quality-control process.

Start by distinguishing between two important types of clashes:

• Hard clashes: Two physical elements occupy the same space, such as a duct passing through a structural beam.
• Soft clashes: Elements may not physically overlap, but required access, clearance, installation, or maintenance space is compromised.

Revit’s Interference Check is a useful first-line tool for identifying hard clashes inside the current model or between selected categories in linked Revit models. Go to Collaborate > Coordinate > Interference Check, then select the relevant categories—for example, ducts against structural framing, pipes against floors, or cable trays against ceilings.

To make the results meaningful, avoid checking every category against every other category. A broad test can create hundreds of irrelevant results and make genuine coordination issues harder to find. Instead, define clash sets that reflect real project risks:

• Mechanical ducts versus beams, joists, and structural braces
• Plumbing pipes versus foundations, slabs, and walls
• Electrical cable trays versus ceiling systems and major MEP routes
• Equipment versus architectural rooms, doors, and service-clearance zones
• Fire protection piping versus structural and mechanical systems

Before running a check, confirm that all linked models are current, positioned correctly, and using an agreed coordinate system. A clash report is only as reliable as the model alignment behind it. Even a small coordinate discrepancy can generate false clashes or hide actual ones.

When Revit produces interference results, do not immediately move geometry. Review each issue in context. Use a dedicated 3D coordination view with a section box, discipline-specific view template, and linked-model visibility settings. This makes it easier to determine whether the clash is genuine, intentional, or caused by incomplete modeling.

A practical review process should include the following:

• Validate: Confirm the objects truly conflict at the current design stage.
• Prioritize: Address structural, code, life-safety, and major routing conflicts first.
• Assign: Identify the responsible discipline or model author.
• Document: Create an issue with a clear description, screenshot, location, and due date.
• Verify: Re-run the relevant clash test after the correction is published.

Remember that Revit Interference Check detects direct geometric overlap, not every coordination concern. Clearance zones, insulation thickness, access panels, hanger space, sequencing constraints, and fabrication tolerances often require additional review. For larger multidisciplinary projects, export or federate models in a dedicated coordination environment such as Autodesk Navisworks, where clash rules, tolerances, grouping, reporting, and issue tracking can be managed more comprehensively.

Establish a regular clash cycle rather than waiting for a major submission milestone. Weekly coordination checks are common during active design, while high-risk phases may require more frequent review. Keep reports focused by tracking only new, active, and unresolved issues; archive resolved clashes so the team can see progress without repeatedly revisiting old results.

For teams building a stronger Revit coordination toolkit, NOVEDGE’s Autodesk Navisworks solutions can support broader model review and clash-management workflows. You can also explore Autodesk Revit tools at NOVEDGE for BIM modeling and documentation needs.

Consistent clash detection is not simply about finding collisions. It is about creating accountable decisions, improving model reliability, and preventing costly field conflicts before they reach construction.

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