6th Annual Passive House Conference
The Perfect Enclosure ApproahA Retrofit Case Study
October 28-29
6th Annual North American Passive House Conference - October 28-29
THE PERFECT ENCLOSURE APPROACH –
A RETROFIT CASE STUDY
Alex Lukachko, Building Science Corporation, Somerville, MA
History of
Control Functions
• Older Buildings
– One layer does
everything
• Newer Building
– Separate layers,
. . . separate functions
Building Science.com
Lukachko
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6th Annual Passive House Conference
The Perfect Enclosure ApproahA Retrofit Case Study
October 28-29
Changes
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Basic Functions of the Enclosure
• 1. Support
– Resist and transfer physical forces from inside and
out
Functional Layers
• 2. Control
– Control mass and energy flows
• 3. Finish
– Interior and exterior
surfaces for people
• Distribution – a building function
Building Science
Lukachko
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The Perfect Enclosure ApproahA Retrofit Case Study
6th Annual Passive House Conference
October 28-29
What is a high performance
enclosure?
• One which provides high levels of control
• Poor continuity limits performance
• Poor continuity causes most problems too:
– E.g. air leakage condensation
– Rain leakage
– Surface condensation
– Cold windows
• Particularly important for retrofits
www.BuildingScience.com
The “Perfect Wall”
• Finish of whatever
• Control continuity
– Rain control layer
• Perfect barrier
• Drained with gap
• Storage
– Air control layer
• Air barrier
– Thermal control layer
• Aka insulation, radiant barriers
– Vapor control layer
• Retarders, barriers, etc
• Structure can be anything
Fire Control may be needed
Sound Control optional
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Lukachko
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Lukachko
The Perfect Enclosure ApproahA Retrofit Case Study
October 28-29
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The Perfect Enclosure ApproahA Retrofit Case Study
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The Perfect Enclosure ApproahA Retrofit Case Study
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The Perfect Enclosure ApproahA Retrofit Case Study
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The Perfect Enclosure ApproahA Retrofit Case Study
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Window
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The Perfect Enclosure ApproahA Retrofit Case Study
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Connections: Who is in charge
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Complexity increases detailing effort / risk of failure / cost
reduces performance
Building Science.com
Lukachko
Enclosures
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The Perfect Enclosure ApproahA Retrofit Case Study
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Enclosure Design: Details
• Details demand the same
approach as the enclosure.
• • • Scaled drawings required at
Building Science.com
Perfect Wall expanded
Fire Control may be needed
Sound Control optional
Building Science.com
Lukachko
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6th Annual Passive House Conference
The Perfect Enclosure ApproahA Retrofit Case Study
October 28-29
Any R-value,
e.g.
4” PIC=R25
5”XPS =R25
6”MFI=R25
Building Science Corporation
Lukachko
Joseph Lstiburek 22
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The Perfect Enclosure ApproahA Retrofit Case Study
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Building Science Corporation
Lukachko
October 28-29
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The Perfect Enclosure ApproahA Retrofit Case Study
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Building Science Corporation
Lukachko
October 28-29
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Building Science Corporation
Lukachko
October 28-29
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Building Science Corporation
Lukachko
October 28-29
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Building Science Corporation
Lukachko
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Building Science Corporation
Lukachko
October 28-29
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The Perfect Enclosure ApproahA Retrofit Case Study
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Building Science Corporation
Lukachko
October 28-29
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Building Science Corporation
Lukachko
October 28-29
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The Perfect Enclosure ApproahA Retrofit Case Study
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Building Science Corporation
Lukachko
October 28-29
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The Perfect Enclosure ApproahA Retrofit Case Study
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Building Science Corporation
Lukachko
October 28-29
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The Perfect Enclosure ApproahA Retrofit Case Study
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Building Science Corporation
Lukachko
October 28-29
Joseph Lstiburek 44
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The Perfect Enclosure ApproahA Retrofit Case Study
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Building Science Corporation
Lukachko
October 28-29
Joseph Lstiburek 46
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The Perfect Enclosure ApproahA Retrofit Case Study
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Building Science Corporation
Lukachko
October 28-29
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6th Annual Passive House Conference
The Perfect Enclosure ApproahA Retrofit Case Study
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Building Science Corporation
Lukachko
October 28-29
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The Perfect Enclosure ApproahA Retrofit Case Study
Building Science Corporation
Lukachko
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6th Annual Passive House Conference
Lukachko
The Perfect Enclosure ApproahA Retrofit Case Study
© buildingscience.com
October 28-29
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6th Annual Passive House Conference
Lukachko
The Perfect Enclosure ApproahA Retrofit Case Study
© buildingscience.com
October 28-29
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6th Annual Passive House Conference
The Perfect Enclosure ApproahA Retrofit Case Study
October 28-29
Preliminary Airtightness
Measurements
69
Questions?
Contact information:
• Alex Lukachko, Building Science Corporation
– [email protected]
Lukachko
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