• Langley Passive House Part 1 - In Progress
  • Langley Passive House Part 1 - In Progress

The Langley Passive house is a 'split-insulated' wall assembley pioneered by RDH Building Engineering for the BC climate. This strategy is described in the Building Enclosure Design Guide (HPO 2011) and Guide for Designing Energy Efficiency Building Enclosures (FPInnovations 2013) both by RDH. The wall design borrows from the North Shore Passive House in construction by the Econ Group (http://www.econgroup.ca/north-shore-passive-house/) and progress photos of the North Shore home are available at http://www.econgroup.ca/north-shore-passive-house/. The schematic roof - wall - foundation diagram shows the component parts for the Langley Passive house. The wall assembley consists of a 2x4 structural and service wall with a plywood vapour barrier at the exterior. An air barrier is taped to the rigid plywood backing. Two layers of rigid roxul provide exterior and continuous exterior insula ...

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Natural light is a valuable asset. For this client's artist studio we explored the performance of skylights versus clerestory windows throughout the year. The results of the solar study turned out to be very telling!

The two options were priced and the framing of the clerestory windows with a beam/rafter system turned out to be a $9,000 premium in the overall budget compared to the option of inserting skylights in between scissor trusses.  So the question came down to, "Are the clerestory windows worth the premium?" And the results of the solar study turned out to be very telling! In the Spring/Fall Equinoxes, the clerestory windows captured the sunlight and directed it at the ceiling, creating a luminous feel to the whole space and diffusing the light down evenly. This effect would be further enhanced with a white or light-colored ceiling.  The skylights, on the other hand, failed to capture much of the sunlight at the Equinoxes due to the shallow angle of the sun.   In the Summer Solstice, the opposite happened. The skylights captured all of the mid-day sun, greatly increasing ...

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