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Technical Guide - Creating a Seamless Interior and Exterior Material Transition | Pure + FreeForm
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Technical Guide - Creating a Seamless Interior and Exterior Material Transition | Pure + FreeForm

  • Use

    Interior or Exterior
  • Applications

    Facades, soffits, canopies, roofs, screen walls, column cover, interior walls, ceilings, hollow-metal doors, millwork, signage
  • Characteristics

    Lightweight, weather-resistant, rigid, single skin, non-combustible, 100% recyclable, low maintenance, VOC free, Red List free, made from at least 20% recycled content
  • Format

    Sheet, Panel
  • Colors

    Any Pure + FreeForm collection finish Any custom designed finish
  • Sizes

    Width: 48" | Height: up to 177"
  • Certification

    Class A Fire Rating
  • Guarantee

    20-year Warranty

More about this product


  • Customizable
  • 20-Year warranty
  • Non-combustible
  • Class A Fire Rating
  • 100% Recyclable
  • Resists UV degradation & corrosion
  • Resists chemical exposure
  • Sustainable


Historically, building elements that transition from exterior to interior have been a pain point for designers. Soffits, walls, ceilings, canopies, and entryways have had their designs sacrificed in the name of performance, or vice-versa. Materials seem to focus on interior or exterior applications, but often the lack of flexibility is the core of the issue. Today, commercial and residential buildings alike seek seamless transitions between their indoor and outdoor areas to optimize the use of space.

Below, some of the more interesting and nuanced ways that projects have achieved material cohesion in these spaces is explored.


25 Kent by Gensler and HWKN uses a custom blackened steel, Brooklyn Steel, with LEDs between panels to clad the entryway. The exterior wall transitions seamlessly to the exterior ceiling, which then transitions through the glazing to the interior lobby ceiling.

25 Kent - Brooklyn Steel - Technical guide

2 Waterline Square by KPF uses a custom woodgrain by Pure + Freeform, Riverside, to clad the interior and exterior ceiling for their carport. The material creates a seamless transition between the interior and exterior, and is clearly visible through the glass.

Waterline Square - Custom Woodgrain technical guide


150 Spear Street by Brereton Architects uses an interior to exterior wall transition, to create cohesion for the entryway. All in plate panels, the material is additionally used on the exterior canopy.

150 Spear - Oxidized Silver Hairline - Technical Guide150 Spear - Oxidized Silver Hairline - Technical Application

The Meridian Market is inside of the Nouria Energy Convenience Center at the Logan Airport. A Boston classic, the market uses transitional Flush Reveal panels in Parisian Rust to clad the interior walls. The panels continue to the exterior patio, keeping the design cohesive.

Logan Airport Gas Station - Gotham Patina - Technical Application

Logan Airport Gas Station - Gotham Patina - Technical Application


Soffits are often underappreciated, but transitional materials can make their design more prominent. By using a wall to soffit transition, the material can be viewed at a new angle. This offers variety in the texture and tone as the metal captures varying amounts of light. These examples, Confidential Childcare by Gensler, Winona State University by Leo A Daly, and The Lundquist Institute by ZGF, all offer different appearances in both soffit and cladding panel, but use the same transitional material to create cohesion between the exterior wall and soffit.

Confidential Childcare Center - Miele Maple - Technical Guide

Winona State University - technical guide

LA Biomed Custom Woodgrain - Technical Application

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