Creating Demolition Views for Existing Building: A Step-by-Step Guide

With our existing building model complete, we're ready to configure demolition views that will clearly communicate what stays and what goes. The key to professional demolition documentation lies in proper view setup and phase management—get this right, and your construction documents will be crystal clear.

We'll start by duplicating our existing level one view. Use the standard duplicate tool here since we don't need to preserve dimensions or annotations from the original view. This approach keeps our workflow clean and prevents unwanted carryover elements that could clutter our demolition documentation.

Following our established naming convention, we'll rename the duplicated view by changing the "E" prefix to "D" for demolition. This systematic approach becomes invaluable when managing complex projects with dozens of views—your future self will thank you for the consistency. We'll tackle the view settings collectively once we have our base views established, ensuring uniform presentation across all demolition drawings.

Our view structure now includes demo views, existing conditions views, and the unchanged level views that serve as our baseline reference. This three-tier approach provides complete project documentation from existing conditions through demolition to final construction. When we advance to creating new construction views, we'll employ this same duplication and renaming methodology to maintain consistency throughout the document set.

Here's a critical point that trips up many professionals: there is no separate "demo" phase in proper BIM workflow. Demolition is an operation that occurs within the new construction phase, not a standalone phase. Creating a dedicated demo phase introduces unnecessary complexity and potential conflicts in your model that can cascade into serious documentation errors down the line.

For demolition views, we need to carefully coordinate two key settings: the phase assignment and the phase filter. Our phase should be set to "new construction" since demolition activities are part of the construction process. The phase filter controls what elements appear and how they're graphically represented—this is where the magic happens in demolition documentation.

Examining the available phase filter options, "Previous plus Demo" is specifically designed for our needs. This filter intelligently handles the graphic overrides we need: it suppresses new construction elements (which shouldn't appear in demo views), applies distinct graphics to existing elements that remain, and uses demolition graphics for elements marked for removal. Most importantly, it's the only filter that simultaneously displays both "existing to remain" and "existing to be demolished" elements with proper graphic differentiation.

The graphic standards are controlled through the phase filter settings, where demolished elements receive dashed line overrides while existing elements to remain are shown in light gray with solid lines. These industry-standard graphics ensure immediate visual clarity for contractors and trades reviewing your demolition plans. Consistency in these graphic standards reduces field questions and prevents costly misinterpretation of your design intent.

We'll apply these same "New Construction" phase and "Previous plus Demo" filter settings to our roof plan view as well. Demolition work often extends to roofing elements, and having properly configured roof demolition views prevents oversight of critical structural modifications. Simply duplicate the existing roof plan and apply our established naming convention and phase settings.

With our three primary demolition views configured—two floor plans and one roof plan—it's essential to verify that all phase filter settings match. This quality control step prevents inconsistencies that become apparent only when placing views on sheets, saving significant time during the documentation phase. A few minutes of verification now prevents hours of corrections later when you're under deadline pressure.

Now that our demolition views are properly configured, we're positioned to begin the actual demolition modeling process, where we'll learn to efficiently remove elements while maintaining model integrity and documentation clarity.