Building Enclosures for Mass Wood Buildings, Facades+ Toronto

Building Enclosures for Mass Wood Buildings Facades+ Toronto October 11, 2019 Brian Hubbs, P.Eng.

Principal, Senior Building Science Specialist

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A Few of Our Past & Current Mass Timber Projects

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Catalyst Spokane, WA

Carbon 12 Portland, OR

First Tech Federal Credit Union
 Hillsboro, OR

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A Confluence of Drivers to Next Generation Wood Buildings & Building Enclosures

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Energy Codes & Carbon Counting (More Insulation &
 Better Airtightness)

Mass Timber Structures

Prefabrication of Enclosures

(Need Protection)


(Faster, Necessary & More Cost Effective)

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Mass Timber Structure

The Building Enclosure 6

Conventional Construction Moisture Risk

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UBC Brock Commons, Tall Wood Houseโ จ Faรงade Challenge

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UBC Brock Commons - Façade Design Criteria

Fast installation – 1 floor/day & water tight to protect structure

Installed without access to exterior – no sealing or finishing

Durable & Highperformance

Resistant to water & able to install in rain

Pre-installed cladding & windows

Thermally Efficient, >R-16 effective walls

Inexpensive, <$65/sqft installed & finished

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Precedents for Prefabrication of Tall Wood

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Precedents for Prefabrication of Tall Wood

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Precedents for Prefabrication of Tall Wood

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UBC Brock Commons- What Wasnâ&#x20AC;&#x2122;t Feasible

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Unitized Curtain wall Optionâ&#x20AC;¨ Problem: Cost, Schedule, Energy

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Tall Wood Prefabrication Option â&#x20AC;&#x201C; Large Panel with Pre-installed Windows

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Prefabricated Panel Competition Mock-ups

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Laboratory Mock-up & Physical Testing

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Centura â&#x20AC;&#x201C; Factory Floor Prefabrication

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Site Installation is at pace with structure â&#x20AC;&#x201C; 1 floor/day

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Field Testing and Commissioning

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A Trifecta of Progression in Future Building Enclosures Prefab, Passive House, & Mass Timber

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Next Generation - Curtain Wood: Prefabricated Thin CLT Wall Panels for Passive House and Net Zeroâ&#x20AC;¨

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Discussion + Questions Brian Hubbs, P.Eng. Principal, Senior Building Science Specialist

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Moisture Considerations and Risk

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Mass Timber and Mopisture

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CLT Panel Interface Airtightness?

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The Biggest Challenge with NLT Overhangs

At joints between 4x12 hemlock beams At joints between blocking At deflection joint above curtain-wall frames Exterior

Interior

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Air Barrier/WRB Membranes for CLT Panels

Liquids

Vapor permeable self-adhered sheets

Liquids

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Discussion + Questions Brian Hubbs, P.Eng. Principal, Senior Building Science Specialist

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