Risk Matrix¶

The Risk Matrix supports the preparation of external moisture risk assessment information in Revit.

Use it to identify and number exterior Risk Faces, apply coordinated colours and tags, manage project cladding information, and assign the current Risk Matrix values to processed walls.

Open Risk Matrix¶

On the Revit ribbon:

Flow → Model → Risk

Risk Matrix opens as a modeless window so you can continue working in Revit while the tool remains open.

When opened, Flow attempts to activate the default Risk View:

RISK-01-Elevation

If Risk Matrix is already open, launching it again activates the existing window rather than opening another copy.

Before You Start¶

Risk Matrix is designed to work with:

• Risk Views whose names begin with RISK-;
• exterior wall types beginning with ADa_E_;
• the Risk Matrix parameters and key schedules configured in the project; and
• the project's cladding setup.

The project Wind Zone is read from Revit Project Information → Wind Zone. It is not independently selected in Risk Matrix.

For the standard workflow, Wind Zone must resolve to:

• Low
• Medium
• High
• Very High
• Extra High

If Wind Zone is missing or unrecognised, Pick Walls is blocked. If it is SED, the standard E2 Risk Matrix workflow is treated as not applicable.

First-Time Workflow¶

1. Open Risk Matrix¶

Open Flow → Model → Risk.

Flow attempts to activate RISK-01-Elevation automatically. Use Previous View and Next View to move through the available Risk Views.

2. Confirm the Project Wind Zone¶

Check the Wind Zone displayed in Project Risk Values.

If Project Information has been changed while Risk Matrix is open, use Refresh to read the current project value again.

➡️ See Assigning Risk Information

3. Review the Other Risk Values¶

Before processing walls, confirm:

• Number of Storeys
• Roof / Wall
• Eave Width
• Envelope
• Deck

These are the values that will be written to newly processed walls during the next Pick Walls operation.

Use the guidance button beside a value when you need to review the corresponding Risk Matrix guidance.

4. Review the Cladding Setup¶

Open the Cladding tab, particularly when setting up the project for the first time.

Risk Matrix discovers applicable exterior wall types and provides a project-wide cladding setup. Review:

• Project Cladding Legend
• Wall Types to Include
• Wall Type Cladding Mapping
• Project Cladding Health

For each discovered wall type, the setup can control whether it is included, its cladding description, and its Cladding 1--4 group.

The setup is stored in the Revit project and restored when Risk Matrix is reopened.

5. Click Pick Walls¶

Return to the required Risk View and click:

Pick Walls

Select the required ADa_E_ exterior walls one at a time.

Each selected wall receives a temporary pale-blue highlight so you can see what has already been selected. The Revit selection prompt also reports the current selection count.

Press Esc when the selection is complete.

In this workflow, Esc finishes wall selection and allows Risk Matrix to process the walls already selected.

6. Let Risk Matrix Group the Walls¶

Flow analyses the selected walls in the current Risk View.

Walls can form one Risk Face where they are sufficiently coplanar and spatially continuous. A Risk Face can therefore contain more than one Revit wall, including vertically related wall segments.

A genuine break or change of plane normally creates a separate Risk Face.

Newly discovered groups are processed in the order established by your wall selection. Where practical, select walls in the Risk Face numbering order you want.

➡️ See Identifying Risk Faces

7. Review the Automatic Result¶

For newly processed Risk Faces, Flow coordinates:

• a Risk Face number such as Face 1, Face 2 or Face 3;
• the current Risk Matrix values;
• the applicable cladding information;
• Risk Face colour and projection graphics in the current view; and
• a Risk Face label tag where possible.

The colour identifies the Risk Face number. It does not represent the final E2 risk score.

8. Continue Around the Building¶

Use Next View and Previous View to work through the remaining Risk Views.

Before each new Pick Walls operation, review whether the five editable Risk Matrix values need to change.

Already processed walls keep their existing risk values if selected again. They can participate in the selection so their presentation can be updated in the active view without silently replacing their stored assessment information.

Face Numbering¶

New Risk Faces normally continue the project sequence:

Face 1 → Face 2 → Face 3 → ...

Selection order influences the order in which newly discovered groups receive their numbers.

Reprocessing a Reset Face¶

If all newly selected walls belong to one previously reset Risk Face, Flow may recognise the previous face number and display Risk Face Number options:

Next Available\ Treat the walls as a new Risk Face and use the next available number.

Restore Original\ Restore the previous number and shift later Risk Faces where required.

Choose Number...\ Insert the face at a selected position in the current sequence.

Correcting Risk Faces¶

Copy Face¶

Use Copy Face when another wall genuinely belongs to an existing Risk Face.

Select a processed source wall, then select the target walls one at a time. Press Esc when finished.

Copy Face changes model information: the target walls inherit the source Risk Face assignment and associated Risk Matrix/cladding information.

Match Wall End¶

Use Match Wall End when only the visible wall-end presentation needs to match an existing Risk Face.

Select a processed source wall, then select the exposed wall face to match.

This is a graphics-only operation. It does not assign the target wall to the source Risk Face or copy its Risk Matrix values.

Reset Risk Matrix¶

Use the reset workflow to choose between correcting one face and clearing the complete project setup.

Selected Risk Face clears the selected face's Risk Matrix information, graphics and associated tags while preserving the project-wide cladding setup.

Entire Project performs a broad Risk Matrix reset and also clears the saved project cladding configuration.

Expected Results¶

After completing the Risk Face mapping workflow, the relevant building faces should have:

• coordinated Risk Face numbers;
• consistent Risk Face colours in the required Risk Views;
• Risk Face labels where Revit can place them;
• the intended Risk Matrix parameter values on processed walls; and
• coordinated cladding information for included wall types.

Review every relevant Risk View before relying on the information for documentation.

➡️ See Reviewing Risk Results

Current Limitations¶

Risk Matrix currently does not:

• calculate a completed E2 score for each Risk Face;
• automatically assess the five geometry/judgement-based risk factors;
• provide the planned face-by-face assessment DataGrid; or
• generate the proposed 3D Risk Matrix review model.

The current workflow is therefore focused on Risk Face mapping, parameter assignment, cladding coordination and documentation.

Related Help¶

• Identifying Risk Faces
• Assigning Risk Information
• Reviewing Risk Results
• Risk Documentation
• Troubleshooting

Getting Help¶

Hover over Risk on the Flow ribbon and press F1 to return directly to this page.