Case Study: Edminster-Bohner Residence (Renovation)
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Transcript of Case Study: Edminster-Bohner Residence (Renovation)
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Case Study: Edminster-Bohner Residence (Renovation)
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Pacifica - < 1 mile from coast• 30+ inches of rain
annually, all from November thru March
• 2860 HDD, spread evenly over the same period
• Winds from the west, but sheltered site
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SFD with home office• 50+ years old, with recent
second story addition• 2 by 4 wood-frame• Cathedral throughout• Attached garage• Terraced lot in steep,
well-drained slope
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SFD with home office (cont’d)• Vented, unconditioned “tight” attics
• Vented, “unconditioned” crawl
• Forced hot air heat, no active cooling
• Single-pane metal windows
• Asphalt shingle roof
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Crawl Details• Wood-framed stem wall
below-grade)• FA heating ducts – metal,
uninsulated
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Crawl Details• Wood-framed stem wall
below-grade)• FA heating ducts – metal,
uninsulated• Exterior grade gypsum
wall sheathing
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Crawl Details• Wood-framed stem wall
below-grade)• FA heating ducts – metal,
uninsulated• Exterior grade gypsum
wall sheathing• All wood in direct contact
with concrete (walls and piers)
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Crawl Details• Wood-framed stem wall
below-grade)• FA heating ducts – metal,
uninsulated• Exterior grade gypsum wall
sheathing• All wood in direct contact with
concrete (walls and piers)• High wood MC, but not
universally• NO wood rot or surface mold
(save on gypsum)
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Crawlspace Performance Profile• Things are getting wet
– Wood wall– Uncovered bare soil
• Things are drying– 6-month split– Energy hog ducts– Vents?
• There is some kind of balance (for 50+ years) but what about changes?
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Retrofit High Performance Details
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Retrofit High Performance Details
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Retrofit High Performance Details
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Retrofit High Performance Details
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Retrofit High Performance Details
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Retrofit High Performance Details
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“After” Details
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“After” Details
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“After” Details
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“After” Details
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“After” Details
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“After” Details
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“After” Details
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