475 On-Site: Collective Carpentry in Bozeman, Montana

475 On-Site: Collective Carpentry in Bozeman, Montana

Prefab Passive Construction in Big Sky Country

As panelized enclosures gain popularity in Passive House circles, Rane Wardwell and Jan Pratschke, owners of Collective Carpentry, were early adopters helping to advance the industry. Their buildings are designed as complete systems, using 3D design software to facilitate panel production, which takes place in their shop located in Invermere, British Columbia. Most recently Collective Carpentry has expanded their territory to build not only within their home province, but also throughout the US in the Pacific NW and the Rocky Mountains.

The video below captures Collective Carpentry's latest project in Bozeman, MT. It is a prefab panelized (almost) Passive House construction for a single family home. They worked with eesome builders. This video shows the speed at which the panels fly into place. On just the 5th day on the job site, they are installing roof panels.

Each panel is massive, with 24-inch deep I-joists filled with dense packed cellulose. They use airtight OSB on the inside taped with TESCON VANA, and a layer of wood fiber as continuous exterior insulation, wrapped with Pro Clima’s SOLITEX MENTO 1000 membrane on the outside. Panels are set in place and airsealed to one another using CONTEGA HF adhesive and more TESCON VANA. For our full recommendations on designing your own I-Joist assembly, download our free Smart Enclosure details.


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