SketchUp models make it easy to visualize a room, but seeing a layout in 3D does not guarantee it works in real life. Without a structured set of review questions, designers often focus on aesthetics and overlook circulation conflicts, furniture clearance problems, or access issues that only become apparent after construction. The RoomFlow Handbook approach brings discipline to the review process by asking the same core questions at every stage — from early massing studies to final furniture placement.
Before evaluating any model, confirm the room's primary purpose. Is it a workspace, a relaxation area, or a transitional space? In SketchUp, tag or color-code zones by function so you can quickly see whether the geometry supports the intended use. If a room labeled "study" has no wall space for a desk or shelving, the purpose and the layout are already in conflict. Resolving this mismatch early prevents costly revisions later.
Trace the most common walking routes through the room using SketchUp's line tool. Draw 36-inch-wide clear paths between doorways, furniture, and key destinations. If a path narrows below 30 inches or requires turning sideways, the layout needs adjustment. Pay special attention to high-traffic areas like kitchen-to-dining and bedroom-to-bathroom routes. These paths should remain unobstructed even when furniture is in use — a chair pulled out or a drawer opened should not block passage.
Each furniture group should occupy a defined zone with adequate clearance on all sides. In SketchUp, measure from the edge of each furniture piece to the nearest wall or adjacent item. Dining tables need at least 36 inches of pull-out space on every seating side. Beds require 24 inches of clearance on at least two sides for sheet changing. Workstations need 30 inches of free space behind the chair for rolling and standing. When these clearances are missing, the room will feel cramped even if the square footage is technically sufficient.
Use SketchUp's camera tools to check sightlines from key positions. Sit at the desk and look toward the door — is the view blocked? Stand at the kitchen entrance and look at the cooking surface — can you see the rest of the room while preparing food? Check that doors swing without hitting furniture by modeling the door arc. Verify that storage is accessible: can a person reach the top shelf without a step stool, and is the step stool stored nearby? These questions catch problems that floor plans alone do not reveal.
SketchUp scenes let you save multiple layout versions and toggle between them instantly. Create at least two alternatives for every room and compare them using the same checklist. Which option provides wider circulation? Which one groups furniture more logically by activity? Which one leaves more flexible space for future changes? Document the trade-offs in a simple table so the decision is based on measurable criteria rather than gut feeling. The RoomFlow Handbook recommends scoring each layout on circulation width, zone clarity, access quality, and adaptability before choosing a final direction.