Transcript Energy Efficiency in Housing and Small Buildings

IRC - Codes Report
October 28th 2011
Codes Update
• Outline
– Code Development Update
– Project Updates
• Policy-Related Activities (Executive Committee)
• Part 9 related work
– Joint Tasks with Other Committees
– Energy efficiency in Housing and Small Buildings
– Upcoming Meetings – Schedule
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Code Development Update
• Publication Dates
– NECB is being published – November 18th , 2011
– Publication alignment for 2015 codes under discussion
• First Public Review towards 2015 NBC, NFC, NPC
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Right Now – www.nationalcodes.ca
October 24th to December 16
1 Part 9 Interim change: Reference ASTM Nailing Standard
1 Part 9 change: Anchorage requirement held back
• Public Review on Energy Delayed
– January 9th to February 24th 2012
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Policy–Related Activities
• Currently Active Tasks
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New Objective – Water-Use Efficiency (TG Scoping)
Renewal of the Farm Building Code (TG Scoping)
Sprinklers, Stairs, Guards, Fire Performance of Houses
Removal of an Objective
• Activities about to get underway …
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Energy Target for the NECB (CCBFC ballot to approve task)
TG on Review of the Code Development System
TG on Harmonization (Provincial-National)
TG on Impact Analysis (Phase 2)
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Policy–Related Activities
• Sprinklers
– Request:
EC asks SCHSB and SCFP for assistance
to inform policy considerations
– Approach:
Joint HSB/FP Task Group
• TG Mandate:
• TG Status:
Review cost/benefit data & asses technical merit
SC review and approval of Terms of Reference
• Step Dimensions (7”-11”)
– Request:
EC asks SCHSB and SCUE for assistance
to inform policy considerations
– Approach:
Subtask group of existing Joint Task Group on
Stairs
• sTG Mandate: Review of benefit studies & Developing cost impact
• sTG Status:
SC review and approval of Terms of Reference
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Policy–Related Activities
• Climbable Guards
– Direction:
• EC will communicate CCBFC concerns to Standing Committees
• EC will clarify that new code change request can be considered
• Fire Performance of Houses
– Direction:
• EC will ask SCHSB for assistance (with help from FP)
to inform policy considerations
• Assess impact of research findings on current code & objectives
– Approach:
• HSB TG with expertise from FP
• Mid-Rise Construction (not Part 9)
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Part 9 Work
• Joint Tasks with Other Committees (ES – Part 5)
– EIFS
• Progress:
reviewed standards (4 meetings)
• Next meeting: January 19th 2012
• Approach:
– reference S716.1, 2 and 3 standards in a separate Subsection in 9.27
– Add rainscreen-EIFS as acceptable option in 9.27.2.2
• Outstanding work:
– review 9.27.3 , 9.27.4. and 9.27.5 for conflicts
– cross-references to
» 9.25. – vented cavity
» 9.10. – foamed plastics
» 9.23.13. – lateral bracing
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Part 9 Work
• Joint Tasks with Other Committees (ES – Part 5)
– Sound Transmission between Dwelling Units
• Progress:
3 meetings
• Next Meeting: January 2012
• Approach Compliance Path
Performance Statement
Assembly Testing Path
Design path
Prescriptive Solutions
Part 5
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(Comprehensive)
Part 9
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(Simplified)
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• Flanking noise will be addressed by
– Existing Sound and fire Tables
– additional information in tables
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Part 9 Work
• Joint Tasks with Other Committees (ES – Part 5)
– Roofing, Waterproofing, Dampproofing Standards
• Progress:
Developed code language to replace application
standards - SCES rejected approach
• Next meeting: January 2012
• Approach:
– Replace material standards
– Find ASTM/International equivalents for application standards
• Outstanding work:
– Identify and review potential standards
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Part 9 Work – Energy Efficiency
• Executive Committee – Guidance
– Overall Cost-benefit Calculations:
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Whole house analysis – YES
Simple Payback – NO
Value Index – NO
Incremental Construction ($) & Energy Benefit ($)
– Division C – reporting requirements
• Compliance Report required
• Compliance Report can be generated by HOT2000
• “check-list” like approach
– Development of Public Consultation Document
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Part 9 Work – Energy Efficiency
• New subjects or significant revisions
– Changes to Application
Compliance Options
Part 9 Prescriptive
Part 9 Performance
NECB
- houses, houses with secondary suites,
- buildings containing only dwelling units
with common spaces ≤ 20% floor area
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- purely residential buildings
- any building, where all non-residential portions
(not F2) have a floor area ≤ 300 m²
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Building Type
- any building where non-residential
occupancies have a floor area > 300m²
- buildings containing F2 occupancies (any size)
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Part 9 Work – Energy Efficiency
• New subjects or significant revisions
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Changes to attic requirements?
Site-built windows ?
HVAC duct alternative !
Simple Trade-Off Examples !
Simple Trade Off Limits ?
• Opaque-to-Opaque option
– Difficulties to characterize attic spaces (roof shapes, styles)
– Limits may have to be introduced (vertical/vertical only, certain
minimum geometries)
• Transparent-to-Transparent
– Limit on solar heat gain coefficient
– maximum allowable increase of U-value
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Part 9 Work – Energy Efficiency
• Changes to attic requirements
– Intent to avoid requiring high heel trusses
– Modeling done without high heel trusses
– Currently proposed
• Slope not more than 1200mm projection
• Perimeter at least at Wall R-value
– Current Practice
• Slopes 5/12 to 7-12 are most common
• 30% - 40% of truss designs already comply
• Mostly affects low slopes
– New Proposal (to be discussed)
• Regulate truss minimum heel height?
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Part 9 Work – Energy Efficiency
• Site-built windows
– Introducing prescriptive alternative
– To be discussed
Construction
Max. U
Req’d U
For climate zones 4 and 5: Non-metallic frames +
triple glazing, 12.7 mm spacer
2.14
double glazing, 1 low-e (e ≤ 0.10), argon, non-metallic spacer
2.02
1.8
For climate zones 6 and 7a: Non-metallic frames +
triple glazing, 12.7 mm spacer, argon, 1 low-e (e ≤ 0.20)
1.78
triple glazing, 12.7 mm spacer, 2 low-e (e ≤ 0.20)
1.74
1.6
For climate zones 7b and 8: Non-metallic frames +
triple glazing, 12.7 mm spacer, 2 low-e (e ≤ 0.10)
1.61
triple glazing, 12.7 mm spacer, argon, 2 low-e (e ≤ 0.20)
1.57
1.4
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Upcoming Meetings – Schedule
• Standing Committee on Housing and Small Buildings
– November 16-18 – Vancouver – Part 9 Energy Efficiency
– February 2012 – Ottawa – Non-energy subjects
– April/May 2012 – Ottawa – Part 9 Energy Efficiency
• Standing Committee on Energy Efficiency in Buildings
– November 9-10 – Ottawa – Part 9 Energy Efficiency
• sTG – Code Consolidation (EEHSB)
– March 2012 – Ottawa – Review of Public Review Comments
• Commission on Building and Fire Codes
– July 2012 – TBD – Approval of Part 9 Energy Efficiency
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