Above the ceiling, below the radar: Why MEP and interior design must speak early

In every project, what's behind the walls and above the ceiling is usually hidden but its impact on the final result is massive. MEP systems above the ceiling space ducts, cable trays, pipes, access panels can directly influence how the interior feels, functions, and even how it's perceived by the client.

Yet, many of these decisions happen in isolation. That’s a mistake.

At Draft & Craft, we’ve seen firsthand how a lack of early coordination between MEP and interior design teams can lead to last-minute compromises or worse, expensive rework.

How MEP above ceiling affects interior outcome

1. Ceiling Height Reduction
Oversized ductwork, cable trays stacked too deep, or low-hanging mechanical equipment can cut down valuable ceiling height, especially in tight commercial or residential units. This affects the sense of space, lighting design and even HVAC performance.

2. Symmetry and Alignment
Lighting layouts and diffuser placements are often dictated by mechanical constraints not by interior rhythm. Without coordination, ceiling grids get misaligned, downlights clash with access panels and the final ceiling looks improvised, not designed.

3. Access Panel Eyesores
Access to valves, dampers and junction boxes is critical but when planned late, panels end up right in the middle of a feature ceiling or a decorative wooden bulkhead.

4. Acoustic Impacts
Poor coordination can result in vibration-prone ducts or loud Fan coil units placed directly above quiet zones like meeting rooms, bedrooms or luxury retail areas.

Why early MEP–ID coordination matters

Working closely with the interior designer from the design stage ensures that every technical element serves the space, not fights it. When we’re involved early, we:

• Reroute systems around ceiling features

• Adjust equipment heights based on ID zones

• Coordinate diffuser locations with lighting and panels

• Select compact solutions when space is tight

BIM makes this easier when used right

Using BIM coordination (not just 3D modeling) allows all disciplines to work in one shared model. At Draft & Craft, we use BIM to:

• Detect clashes before they happen on site

• Review ceiling zones together with ID and lighting teams

• Optimize space usage and minimize ceiling bulk