What Can We Afford?Sustainability, Performance, and Roof Insulation
Brought to you by Hunter Panels
Makers of Polyiso Roof Insulation and CoolVent®
Energy Efficiency, Sustainability, and Roof Insulation 2
Sustainability, Performance, and Roof Insulation
Hunter Panels is a Registered Provider with the American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.
This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using distributing or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
This presentation is protected by US and International copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the publisher is prohibited. Copyright © 2009 Hunter Panels. Program development by SpecGuy.
Energy Efficiency, Sustainability, and Roof Insulation 3
Sustainability, Performance, and Roof Insulation
Learning objectives: Participants will be able to: Explain the difference between First Cost, Building
Operating Cost, and Whole System Cost in relationship to roof insulation selection
Establish design requirements for roof insulation performance based on sustainable design principles and LEED credit criteria
Identify other important performance requirements used to select roof insulation products
Energy Efficiency, Sustainability, and Roof Insulation 4
What Can We Afford?
It's not a simple question
Our clients expect an answer
The answer may not be what they or we expect
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What Can We Afford?
We'd better become cost experts First Cost Building Operating Cost Whole System Cost
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What Can We Afford? First Cost
Definition of First Cost Site acquisition Development fees Design services Materials costs Installation costs
Energy Efficiency, Sustainability, and Roof Insulation 7
What Can We Afford? Building Operating Cost
Definition of Building Operating Cost Owning Operating Heating and cooling Cleaning Maintaining Renewing
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What Can We Afford? Whole System Cost
Definition of Whole System Cost Social and political Environmental Infrastructure Military
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What Can We Afford? Sustainability
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What Can We Afford? Sustainability
Definition of SustainabilitySustainability: Situations where the environmental impacts of present human activities do not reduce the potential for the environment to support future human activities
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Environmental impact of our buildings
Buildings are our biggest producers of greenhouse gases 76% of planned coal-based power expansion will go
toward operating buildings Current energy costs and energy codes
do not reflect long term costs We're still building like it's 1970!
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First Cost and Roof Insulation Selection
First cost drives the majority of construction industry roof system designs Meet only minimum requirements for manufacturer
warranty Meet only minimum building code requirements Meet only minimum energy code
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First Cost and Roof Insulation Selection
Contractors advocate first cost decisions Market pressures result in minimally acceptable
systems Contractors resolve owner budgets to get projects
started First Cost may cost owners more …
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First Cost and Roof Insulation Selection
Architects advocate long term owner and community interest Economic climate now is creating an environmental
imperative Architects can support decisions that look beyond first
cost Owners are forced to consider long term interest
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First Cost and Roof Insulation Selection
Comparison of first cost roof insulation design choices for foam plastic roof insulation Market conditions? Project conditions? Related construction costs? Relation to HVAC system design? Relation to electrical system design?
Polyisocyanurate (PIR) ?Extruded polystyrene (XPS) ?Expanded polystyrene (EPS) ?Lightweight insulating concrete (LWIC) ?
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Operating Cost and Roof Insulation Selection
Life cycle costs affect future facility owners and leasees Energy purchase costs HVAC system maintenance System renewal costs
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Whole System Costs and Roof Insulation Selection
Life cycle costs affect future facility owners, leasees, and communities: Building abandonment costs
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LEED and Roof Insulation Selection
LEED emphasizes the importance of environmental impact as part of design process Comparison of optimal energy performance to base
energy code-compliant building Restrictions on chemically-undesirable substances Re-usability of materials Use of recycled materials Reduced transportation costs for materials
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LEED and Roof Insulation Selection
A reminder when you're reading product literature about sustainability: "Although USGBC does not certify,
promote, or endorse products and services of individual companies, products and services do play a role and can help projects with credit achievement. (Note that products and services do not earn projects points.)"
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LEED and Roof Insulation Selection
LEED credits related to roof insulation selection LEED Energy and Atmosphere EA Prerequisite 2:
Minimum Energy Performance•Compliance with ASHRAE 90.1-1999 and local energy
codes
LEED Energy and Atmosphere EA Credit 1: Optimize Energy Performance• Increased roof insulation levels
contribute to optimized energy performance
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LEED and Roof Insulation Selection
LEED credits related to roof insulation selection LEED Materials and Resources MR Credit 1:
Building Reuse•Roof insulation from some systems is reusable in
recover and partial tear off applications
LEED Materials and Resources MR Credit 2: Construction Waste Management•Alternatively, reuse of roof insulation may
help achieve future points under recycling portion of this credit
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LEED and Roof Insulation Selection
LEED credits related to roof insulation selection LEED Materials and
Resources MR Credit 4: Recycled Content•Certain roof insulation
types from certain manufacturers contain recycled materials
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LEED and Roof Insulation Selection
LEED credits related to roof insulation selection LEED Environmental Quality EQ Credit 4:
VOC limits•Roof insulation materials located inboard of the
roofing membrane may affect interior VOC or formaldehyde levels, though these items are not addressed under this credit
LEED Innovation in Design ID Credit 1:•Addresses sustainable design practices not
specifically addressed under existing LEED credits
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Life Cycle Cost and Roof Insulation Selection
Life cycle cost analysis (LCA) is an emerging sustainable design best practice Building purchasers and leasees
use LCA in due diligence analysis
Applies to whole building and to individual building systems
Addresses present and future costs LEED 2009 will include LCA
considerations
ASTM E917-05 "Standard Practice for Measuring Life-Cycle Costs of Buildings and Building Systems"
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Value Engineering and Roof Insulation Selection
Value Engineering or Value Methodology is a professional discipline applied to functional analysis of choices during the design process
Savings advantages of Value Engineering: From The Whole Building Design Guide
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Value Engineering and Roof Insulation Selection
Typical VE analysis related to roof insulation selection includes: Relationship between roof insulation levels and annual
energy costs across life of system Relationship between roof insulation levels and HVAC
system size Relationship between roof insulation thickness and
building perimeter enclosure costs
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Value Engineering and Roof Insulation Selection
Typical VE analysis related to roof insulation selection includes Long-term thermal performance Longevity of roofing and roof
insulation Roofing and roof insulation
renewal capability to extend service life Roofing and roof insulation reusability
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Roof Insulation Fire Safety Selection Criteria
Building codes address roof insulation fire safety through 4 sets of criteria UL fire resistance rated roof/ceiling assembly (hourly
rating) External fire resistance rating (Class A, B, or C) Internal standard Class 1 FMG 4450/4470 Use of foam plastic insulation
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Roof Insulation Fire Safety Selection Criteria
International Building Code (IBC) Section 2603: Foam plastic insulation Must meet external fire-resistance Class A, B, or C Must use approved thermal separation board, or Must be used as part of identical tested
roof covering assembly•Factory Mutual Global (FMG) 4450/4470
•Underwriters Laboratories (UL)1256
•Tests using other assemblies do not meet code requirements
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Roof Insulation Fire Safety Selection Criteria
International Building Code (IBC) Section 2603: Polyiso is the only foam plastic insulation approved for
most roof covering assemblies without use of a thermal separation board•Polyiso meets both FMG 4450/4470 and UL 1256 as a
component of most high slope and low slope roofing systems
•Extruded polystyrene does not meet FMG 4450/4470
•Extruded polystyrene does not meet UL 1256 in steep slope or most low slope roofing
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Roof Insulation Fire Safety Selection Criteria
Foam plastics vary in their performance when exposed to heat
Service temp
Melting point
Flash point
Polyisocyanurate (PIR) 250 none none
Extruded polystyrene (XPS) 165 167 615
Expanded polystyrene (EPS) 165 175 610
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Other Roof Insulation Selection Criteria
Design impact of thickness to long-term R value Reduced fascia, rake, and curb profiles for high slope
roofs Reduced gravel stop, curb, and parapet heights for low-
slope roofs Reduced perimeter nailer thickness Reduced flashing depth Reduced thickness allowance for re-roofing
Inches needed for R-30 insulation
Polyisocyanurate (PIR) 5 inches
Extruded polystyrene (XPS) 6 inches
Expanded polystyrene (EPS) 7 inches
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Other Roof Insulation Selection Criteria
Tolerance of roof surface traffic for equipment access
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We Can Afford More
The cost savings of going beyond the minimum
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We Can Afford More
Breaking even is better than breaking even Whole system costs of energy supply are
not directly passed to building end users Conserving energy relieves social
and political pressures If life cycle cost of energy-saving
improvements is just break even, it's better than break even
We can't afford to not afford thermal performance
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We Can Afford Sustainability
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For more information
List of resources and websites Polyisocyanurate Insulation Manufacturers Association
(PIMA): www.polyiso.org Department of Energy Building Energy Codes Center:
www.energycodes.gov US Green Building Council (USGBC): www.usgbc.org ASTM International: www.astm.org SAVE International Value Engineering Society:
www.value-eng.org Value Engineering article:
http://en.wikipedia.org/wiki/Value_engineering The Whole Building Design Guide: www.wbdg.org
Energy Efficiency, Sustainability, and Roof Insulation 38
Sustainability, Performance, and Roof Insulation
Learning objectives: Participants are be able to: Explain the difference between First Cost, Operating
Cost, and Whole System Cost in relationship to roof insulation selection
Establish design requirements for roof insulation performance based on sustainable design principles and LEED credit criteria
Identify other important product selection criteria used to select roof insulation products
Questions?
This concludes this AIA/CES education program
What Can We Afford?Sustainability, Performance, and Roof Insulation
Brought to you by Hunter Panels
Makers of Polyiso Roof Insulation and CoolVent®
www.hpanels.com