St. John’s Aeries Tower: Montana’s First Mass-Timber Senior Living Landmark
Dextall’s first project in Montana—bringing DWALL unitized panels, balcony-ready engineering, and AAMA 2605 aluminum cladding to a 12-story CLT senior living landmark in Billings.

St. John’s Aeries Tower is a 75,000 SF, 12-story senior supportive housing community that pairs refined, service-rich living with a forward-thinking construction strategy. As Dextall’s first mass timber project—and our first entry into the Montana/Midwest market—Aeries offers the regional AEC community a clear, real-world example of how unitized prefabricated façade systems can accelerate schedules, reduce site disruption, and complement innovative structural approaches like cross-laminated timber (CLT).

Dextall is responsible for the design, engineering, and supply of DWALL unitized exterior wall panels with 3mm aluminum cladding (AAMA 2605), as well as loose aluminum cladding, doors, and windows. With a thermal performance of R-16.9, the façade supports a comfortable, energy-efficient envelope while delivering crisp architectural detailing—such as an aluminum accent ribbon, concealed hinges, and a custom façade “step” that allows each elevation to cantilever over the next.
Designed to accommodate the loads and penetrations required for Endurable prefabricated balconies alongside Dextall’s façade system. Dextall’s panels are prepped in advance so balcony outriggers pass cleanly through the envelope, enabling a seamless and efficient installation strategy.

Installation is executed using a spider crane, leveraging the advantages of unitized prefabrication—faster enclosure, reduced field labor, and simplified logistics without relying on a tower crane. Combined with CLT construction, the approach supports a lower-carbon, higher-performance building delivery model—one aligned with where the industry is heading as more teams prioritize embodied carbon reduction, constructability, and scalable systems-based construction.













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