Environmentally Innovative Guideline for Low-Slope Roofing:
WORKING DRAFT:
NOT FOR PUBLICATION OR DISTRIBUTION BEYOND CEIR BOARD OR RESEARH
COMMITTEE
July 8, 2009
Contents:
A. Introduction
B. Section & Credit Summary
C. Credit Detail by Section
Page 2
Page 3
Page 4-13
CONFIDENTIAL:
NOT FOR PUBLICATION OR DISTRIBUTION BEYOND CEIR BOARD OR RESEARH
COMMITTEE
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Environmentally Innovative Guideline for Low-Slope Roofing
INTRODUCTION
The Environmentally Innovative Guideline for Low-Slope Roofing is being developed to
address a number of challenges posed by current green building rating systems in
regard to their application to modern low-slope roofing systems:

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Expand Roofing’s Role in Sustainable Building. Low-slope roofing systems
contribute in many ways to achieving building sustainability, including reducing
energy consumption, producing renewable energy, managing water and material
resources, and extending building service life. Unfortunately, many popular green
building rating systems tend to narrowly focus on one or two roof system options,
such as cool roofing or vegetated roofing, instead of the broader array of roofing
systems available to enhance the sustainability of the built environment.
Focus Attention on Re-Roofing. Green building rating systems, with their
predominant focus on new construction or major building renovation, tend to
neglect the billions of square feet of re-roofing systems than are installed on
existing buildings every year.
Increase Emphasis on Durability. Green building rating systems place too little
emphasis on the durability and long-term performance required for a roofing
system to be considered truly sustainable; and this lack of emphasis on roofing
durability may significantly reduce the long-term sustainability of the underlying
building.
OBJECTIVES
The Environmentally Innovative Roof System Guideline is intended to serve as the
starting point for a longer term process to develop a widely recognized standard for the
design and selection of roofing systems. As a starting point, the Guideline must serve a
number of roles:
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


The guideline must be simple and easy to understand so it can gain rapid
public visibility and recognition.
The guideline must reflect current green building thinking by incorporating
many of the criteria and measurements from existing green building standards.
The guideline must be designed for tangible value: a reliable guide to help
building owners make effective decisions, a useful template for designing
education and certification programs, and a valuable tool for a wide variety of
roofing industry professionals.
The guideline must be designed to evolve into a recognized consensus
standard, so it may be formally integrated into public construction specifications
and requirements.
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Environmentally Innovative Guideline for Low-Slope Roofing:
Section and Credit Summary
SECTION 1: ENERGY MANAGEMENT
Credit E1
Credit E2
Credit E3
Credit E4
Credit E5
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High R Roof Systems
Cool Roof Systems:
1. Cool Reflective Roofs
2. Cool Vegetated Roofs
3. Cool Ballasted Roofs
4. Cool Hybrid Roofs
Best Thermal Insulating Practice
Rooftop Energy Systems:
1. Solar PV
2. Solar Thermal
3. Wind
4. Energy-Ready Roofs
Rooftop Daylighting
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SECTION 2: MATERIAL MANAGEMENT
Credit M1
Credit M2
Credit M3
Credit M4
Credit M5
Recycled Content
Materials Reuse
Roofing Waste Management
Bio-Based / Rapidly Renewable / Regional Materials
Low-VOC Materials
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SECTION 3: WATER MANAGEMENT
Credit W1
Credit W2
Roof Storm Water Retention
1. Vegetated Roofs
2. Non-Vegetated Water-Retaining Roofs
3. Hybrid Water-Retaining Roofs
4. Water-Retention Ready Roofs
Roof-Related Water Use Reduction
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SECTION 4: DURABILITY / LIFE CYCLE MANAGEMENT
Credit D1
Credit D2
Credit D3
Credit D4
Credit L1
Credit L2
Credit L3
Credit L4
Credit L5
Durable Roof System Design
Roof Insulation Protection / Durability
Roof Drainage Design
Roof Traffic Design
Roof Maintenance Manual
Roof Maintenance Agreement
Product Life Cycle Assessment (LCA)
Roof System Renovation Plan
Roof System Recycling Plan
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Environmentally Innovative Low-Slope Roof System Guideline
SECTION 1: ENERGY MANAGEMENT
E1 High R Roof System:
Intent. Achieve levels of roof-related energy performance beyond the prerequisite
standard to reduce environmental and economic impacts associated with excessive
energy.
Requirements. The minimum thermal resistance or R-value of the roofing system
installed above the roof shall meet or exceed the following requirements:
ASHRAE Climate Zone 1 :
ASHRAE Climate Zones 2 – 8 :
New Construction
Re-Roofing
New Construction
Re-Roofing
R-16.5
R-17.5
R-20.0
R-22.5
R-25.0
R-16.0
R-18.0
R-21.0
R-22.0
R-24.0
R-22.0
R-22.5
R-25.0
R-27.5
R-30.0
R-21.5
R-22.0
R-24.0
R-26.0
R-28.0
Points :
Minimum
Prerequisite*
TBD
TBD
TBD
TBD
* ASHRAE 90.1-2007 minimum values for above deck roof insulation value, plus 10% improvement for new
construction and 8% for re-roofing, rounded to the nearest 0.5 R.
Roof system R-value shall be determined based on insulation unit values and total Rvalue computations as calculated using the National Roofing Contractors Association
(NRCA) “EnergyWise” online roof energy calculator (Winter R Value).
Technologies and Strategies. The minimum R-values in the table may be achieved by
many different low-slope roofing systems using a variety of thermal insulating materials.
Chapter 2 of the NRCA 2007 Roofing Manual: Membrane Roof provides an excellent
overview of modern roof insulation, including types and desirable properties of roof
insulation. The NRCA “EnergyWise” or similar energy calculator also may be used to
explore different material and system options and to estimate potential annual energy
cost savings.
Discussion. This credit is based on the underlying principle of LEED v3 Credit EA1(Optimize Energy Performance), which calls for a sliding scale of energy savings using
ASHRAE 90.1-2007 as a baseline, with a minimum prerequisite improvement of 8% for
existing buildings and 10% for new buildings.
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E2 Cool Roof System:
Intent. Reduce heat island effects to minimize impacts on microclimates and human and
wildlife habitats.
Requirements. Install any of the following roofing system options:
Roofing System Option:
Points:
1. Install a cool reflective roof over 75% of roof surface:
a. Low Slope Min. SRI ≥ 78
b. Steep Slope Min. SRI ≥ 29
TBD
2. Install a cool vegetated roof over 50% of roof surface
TBD
3. Install a cool ballasted roof over 75% of roof surface
a. Minimum 22 lb. / sq. ft ballast (2009 California Title 24 min.)
b. Minimum 15 lb. / sq. ft ballast (2009 Chicago Energy Code min.)
TBD
TBD
4. Install a cool hybrid roof using any combination of #1, #2, and #3 so that:
Area of #1 /.75 + Area of #2 / .5 + Area of 3 / .75 ≥ Total Roof Area
TBD
Technologies and Strategies. As illustrated by the different options, cool roofs may be
achieved using a variety of available technologies. In addition, these technologies may
be used in combination to achieve different aesthetic, performance and economic goals.
As an example, sections of cool ballast may be combined with cool vegetated roofs to
provide walkways and traffic protection as well as enhanced wind and fire protection at
critical roof perimeter areas.
Discussion. This credit is identical to LEED v3 Credit SS-7.2 (Heat island: Roof), with
the exception that several recently-approved cool ballasted systems have been added.
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E3 Best Thermal Insulating Practices
Intent. Maximize the value of thermal roof insulation through installation practices that
minimize thermal discontinuities within the roofing system.
Requirements. Install the roof system using any or all of the following insulation options:
Option:
Points:
1. Install multiple layers of board insulation, and stagger the joints
between the layers.
TBD
2. Mechanically fasten the bottom layer(s) of board insulation, and install the
upper layer(s) using a code-approved insulation adhesive. Or, install the
entire insulation assembly using code-approved insulation adhesives.
TBD
3. Install the insulation monolithically, using spray polyurethane foam (SPF),
or similar technology.
TBD
Technologies and Strategies. The value of thermal roof insulation can be optimized by
assuring that gaps, voids and other discontinuities within the overall insulation assembly
are minimized. This can be accomplished using a variety of techniques suitable to many
different types of low-slope roofing systems. Roofing industry research suggests that the
use of these strategies may increase the efficiency of roof insulation by 5% to 10%.
Discussion. The widely-recognized value of minimizing thermal discontinuities is not
currently mentioned in any of the major green building rating systems.
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E4 Rooftop Energy Systems:
Intent. Use rooftop renewable energy (solar, wind, solar thermal) to generate a portion
of the building’s energy requirements:
Requirements. Install one or more of the following rooftop renewable energy options:
1. Solar PV. Install a roof-mounted or roof-integrated PV system with total rated power
under Standard Test Conditions (STC) per square foot of available roof surface area*
as listed in the following table:
Total Rated PV Power per Square Foot of Available Roof Surface*:
1.0 to 2.5 watts
2.6 to 5.0 watts
Greater than 5.0 watts
Points:
TBD
TBD
TBD
Total rated power per square foot shall be calculated by dividing the total STC rated power of the installed
solar units by the available roof surface area*
*Available roof surface area shall exclude: 1) a 10-foot wide area extending around the roof perimeter, 2)
the area surrounding all roof penetrations (such as skylights, hatches, curbs, penthouses, etc.) and nonPV rooftop-mounted equipment extending 5-feet in all directions from the penetration and equipment.
2. Solar Thermal. Install a roof-mounted solar thermal system that generates a portion of
with a total collector panel area listed in the following table:
Total Collector Panel Area*:
Points:
60 sq. ft. to 120 sq. ft.
121 sq. ft. to 240 sq. ft.
Greater than 240 sq. ft.
TBD
TBD
TBD
*Total collector panel area as rated by the Solar Rating and Certification Corporation (SRCC) according
to SRCC Document OG-100, "Operating Guidelines for Certifying Solar Collectors," and its companion
document, SRCC Standard 100, "Test Methods and Minimum Standards for Certifying Solar Collectors."
3. Wind. Install roof-mounted wind power unit(s) with a total Instantaneous Power
Rating (IPR) at 28 mph as listed in the following table:
IPR at 28 mph:
1 KW to 5 KW or greater
5.1 to10 KW
Greater than 10 KW
Points:
TBD
TBD
TBD
4. Energy-Ready Roof System: Install a roofing system suitable for future installation of a
specific renewable energy technology (or technologies), as documented by the
roofing system manufacture’s agreement to continue the originally-issued roof
warranty coverage after the installation of the renewable energy system(s) at a later
date no more than 5 years from the date of the original warranty issuance.
Points: TBD
Discussion. Credits for rooftop renewable energy production are included in LEED v3
Credit EA-2 (On-Site Renewable Energy), but the credits require a whole-building
energy calculation to determine the amount of the credit. The current approach reflects
the general direction of LEED, but allows the credits to be based on readily-available unit
power ratings, adjusted for the total production and density of the energy source. It
should be noted that the points allocated to large PV systems should be higher than the
comparatively smaller contributions of solar thermal or wind power.
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E5 Roof Daylighting
Intent. Use rooftop daylighting to supply a portion of building lighting requirements.
Requirements.
1. Basic Rooftop Daylighting:
Points TBD
Demonstrate, through computer simulation, that the minimum daylight illumination
level listed in the following table has been achieved in a minimum of 75% of all
regularly occupied areas directly beneath the roof area. Modeling must be based on
horizontal foot candles under clear sky conditions, at noon, on the equinox, at 30
inches above the floor, using Skycalc or a similar simulation program:
Type of Occupancy:
Minimum Foot candles:
Office
Classroom
Light Manufacturing
Warehousing
25 fc
25 fc
25 fc
10 fc
Minimum daylight illumination levels may include a combination of daylighting
sources, including rooftop skylights, rooftop tubular daylighting devices (TDDs), as
well as existing windows and other wall openings.
2. Controlled Rooftop Daylighting
Points TBD
Document that Basic Rooftop Daylighting (E5-1) is fully integrated with photo controls
for the building artificial lighting system so that interior lights shall automatically turn
off or dim when daylighting is available.
Technologies and Strategies. For many large factory and warehouse buildings without
internal ceilings, the installation of roof-mounted skylights – either as part of the initial
building construction or whenever the roofing system is replaced - may be one of the
most economical energy-savings investments available to building owners. The
economics of daylighting are especially attractive when the interior lighting system is
integrated with the available daylighting with automated controls.
For building owners and roofing contractors who wish to pursue this credit, Skycalc is a
free and relatively simple computer program that has been endorsed by the California
Energy Commission as a suitable calculation tool for daylighting design and evaluation.
The Skycalc program and training modules may be downloaded from the website of
Energy Design Resources (www.energydesignresources.com).
Discussion. The 25 foot-candle standard is identical to the requirements of LEED v3
IEQ Credit 8.1(Daylight and Views). This credit, however, allows a reduced illumination
requirement for warehouses, which can benefit from reduced daylighting levels. In
addition, this credit provides additional points for the installation of an integrated control
system to further maximize the investment and energy savings from daylighting.
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SECTION 2: MATERIAL MANAGEMENT
M1 Recycled Content:
Intent. Increase demand for building products that incorporate recycled content
materials, thereby reducing impacts resulting from extraction and processing of virgin
materials.
Requirements. Use materials with recycled content such that the sum of post-consumer
recycled content plus 1/2 of the pre-consumer content constitutes a minimum
percentage of the total value of the materials in the project:
Percent:
≥ 10%
≥ 20%
Points:
TBD
TBD
NOTE: Recycled content is defined in accordance with the International Organization of Standards
document, ISO 14021 — Environmental labels and declarations — Self-declared environmental claims
(Type II environmental labeling). Post-consumer material is defined as waste material generated by
households or by commercial, industrial and institutional facilities in their role as end-users of the product,
which can no longer be used for its intended purpose. Pre-consumer material is defined as material diverted
from the waste stream during the manufacturing process. Reutilization of materials (i.e. re-work, regrind or
scrap generated in a process and capable of being reclaimed within the same process that generated it) is
excluded.
Technologies & Strategies. Existing roofing systems offer a number of opportunities for
materials containing recycled content. Examples of roofing materials that may be
suitable for reuse include insulation boards (especially insulation boards that have been
protected by an overlying cover board), and preservative-treated nailers and blocking.
Discussion. This credit is similar to LEED v3 MR Credit 4 (Recycled Content).
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M2 Materials Reuse:
Intent. Extend the lifecycle of existing building stock, conserve resources, retain cultural
resources, reduce waste and reduce environmental impacts of new roofing systems as
they relate to materials manufacturing and transport.
Requirements. Document the reuse of existing roofing materials as a percentage of
total project material value:
Percent:
≥ 20%
≥ 40%
Points:
TBD
TBD
The origin of the reused roofing materials may include roofing installations other than the
current roofing installation.
Technologies & Strategies. Existing roofing systems offer a number of opportunities for
material reuse, providing the materials remain dry and free of visible degradation.
Examples of roofing materials that may be suitable for reuse include insulation boards
(especially insulation boards that have been protected by an overlying cover board), and
preservative-treated nailers and blocking. The value of these existing roofing materials
should be assigned based on current replacement value.
Discussion. This credit is similar to LEED v3 MR Credit 3 (Materials Reuse), with the
exception that the target percentages have been reduced to better reflect the practical
opportunity for direct reuse of roofing materials.
M3 Roofing Waste Management:
Intent. Divert construction and demolition debris from disposal in landfills and
incineration facilities. Redirect recyclable recovered resources back to the manufacturing
process and reusable materials to appropriate sites.
Requirements. Recycle and/or salvage nonhazardous construction and demolition
debris. Develop and implement a construction waste management plan that, at a
minimum, identifies the materials to be diverted from disposal and whether the materials
will be sorted on-site or comingled. Calculations may be based on weight or volume, but
must be consistently applied. The minimum percentage debris
recycled or salvaged for each point threshold is as follows:
Percent:
≥ 50%
≥ 75%
Points:
TBD
TBD
Technologies and Strategies. Establish goals for diversion from disposal in landfills
and incineration facilities and adopt a construction waste management plan to achieve
these goals. Roofing debris that has an open market value (e.g., roofing membrane used
as an alternative daily cover material for landfills) may be applied to the construction
waste calculation. Diversion may also include donation of materials to charitable
organizations and salvage of materials on-site.
Discussion. This credit is similar to LEED v3 MR Credit 2 (Construction Waste
Management).
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M4 Bio-Based / Rapidly Renewable / Regional Materials:
Intent. Increase demand for roofing materials and products that 1) utilize bio-based
polymers as a key raw material, 2) are composed of rapidly renewable materials such as
plant fibers, and 3) reduce transportation impacts through extraction and manufacture
close to the job site.
Requirements. Use roofing materials that are bio-based, rapidly renewable, or
extracted/manufactured within 500 miles of the project as a percentage of total project
material value:
Percent:
≥ 10%
≥ 20%
Points:
TBD
TBD
Technologies and Strategies. A number of bio-based, rapidly renewable, and regional
materials are available for use in roofing systems. Currently available bio-based
materials include roof coatings and foam insulations made with bio-based polymers.
Rapidly renewable roofing materials include roof cover boards made with renewable
plant fibers and starch binders. Roofing materials that are both regionally extracted and
manufactured may include stone used for ballast and surfacing as well as concrete and
clay pavers and tiles.
Discussion. This credit combines elements of LEED v3 MR Credits 5 (Rapidly
Renewable Materials) and 6 (Regional Materials), as well as an opportunity to promote
materials using bio-based polymers.
M5 Low-VOC Materials:
Intent. Reduce the potential for low-level ozone formation by reducing the VOC content
of roofing materials, especially roofing primers, sealants, adhesives, and coatings.
Requirements. Use materials to install the roofing system with VOC contents less tan or
equal to the following requirements:
VOC Content: Points
≥ 50 g/l
≥ 250 g/l
TBD
TBD
Technologies and Strategies. The 250 g/l VOC criterion is similar to standards for
roofing adhesives and sealants currently established by the South Coast Air Quality
Management District (SCAQMD) and the Ozone Transport Commission (OTC).
Currently, a number of roofing adhesives, sealants and coatings meeting the 250 g/l
criterion are available that can be applied in a variety of temperature conditions. The 50
g/l criterion is more stringent, and in general, only water-based roofing materials are
available to meet this standard. Accordingly, the use of the 50 g/l criterion may only be
suitable in warmer climates in which jobsite ambient temperatures are always 40oF or
higher.
Discussion. This credit is similar to LEED IEQ Credit 4.1, but the LEED credit is applied
only to indoor applications.
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SECTION 3: WATER MANAGEMENT
W1: Roof Storm Water Retention
Intent. Reduce the potential for roof-related storm water runoff in order to minimize
environmental impacts on rivers, lakes and other waterways.
Requirements. Install any of the following water-retaining roofing system options:
Roofing System Option:
Points:
1. Install a vegetated roof over 75% of the roof surface:
a. Intensive vegetated roof (over 4” planting media)
b. Extensive vegetated roof (2” to 4” planting media)
TBD
TBD
2. Install a non-vegetated water-retaining roof* over 75% of the roof surface
TBD
*Non-vegetated water-retaining roofing systems use a variety of water-retention mechanisms,
including moisture retention mats, trays, and other devices to capture and hold storm water. In order
to qualify as a water-retaining roof system, the roofing system manufacturer must provide
documentation that the roof system design is capable of retaining at least 90% of a 1” rain event for a
24 hour period.
3. Install a hybrid combination of #1 and #2 over 75% of the roof surface area
TBD
4. Install a “water-retention ready” roofing system suitable for future installation of a
specific water retention technology (or technologies), as documented by the roofing
system manufacture’s agreement to continue the originally-issued roof warranty
coverage after the installation of the water retention system(s) at a later date no more
than 5 years from the date of the original warranty issuance.
Points: TBD
Discussion. The current LEED system awards points for vegetated roofing systems, but
only under the “Heat Island” credit (LEED SS Credit 7.2). In addition to helping advance
the overall value of vegetated roofing systems beyond cool roofing, this credit also helps
to advance the emerging development of non-vegetated water-retaining roofing systems.
W2: Roof-Related Water Use Reduction
Intent. Increase water efficiency by retaining and reusing roof storm water for on-site
water grey water use (landscaping and other non-potable uses).
Requirement. Document that all roof storm water runoff is directed to a central
collection and storage location for use by the building owner for landscape irrigation,
decorative water features, and other non-potable uses.
Technologies & Strategies. Delivery of roof storm water may be accomplished using
roof drains, gutters, downspouts and other devices that channel and direct the water to a
central storage location (or locations) that may be installed and maintained by others.
Engineered roof drainage may be combined with a water-retaining roofing system
(Credit W1), but this is not necessary.
Discussion. This credit is similar to LEED v3 WE Credit 1 (Water Efficient
Landscaping), but it helps to focus attention on the value of the roof as a collection
resource for non-potable water.
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SECTION 4: DURABILITY / LIFE CYCLE MANAGEMENT
D1 Durable Roof System Design:
Intent. Advance the design and use of roofing systems with potential service lives
greater than current average service life.
Requirements. Install a roofing system documented to provide an average estimated
service life greater than the current average roof service life of 17 years*.
Points: TBD
*17-year average current service life based on Ducker (2003), “Comprehensive Nonresidential Building
Analysis to Estimate the Current Reality of Roofing Longevity.”
Technologies and Strategies. Service life documentation may include:
 NRCA Low-Slope Roofing Materials Guide: Roof Membrane Warranties
 Scope of Coverage: Material and workmanship
 Length of Coverage: 20 years or longer
 Independent Evaluation Agency Report (FM, BBA, etc.), indicating 20 year or greater
service life expectation under normal conditions.
 Consensus Standards, such as Performance Criteria for Constructed Roofing
Systems (PCCRS), indicating higher than average service life expectation under
normal conditions.
Discussion. No similar credit is available in LEED. Although roofing warranties may not
offer the best long-term resource for determining “above average” roof system
performance, they may serve as a reasonable criterion until the PCCRS program can
get back on track.
D2 Insulation Protection / Durability:
Intent. Protect thermal insulation from damage in order to extend useful service life and
maintain originally specified thermal resistance and energy efficiency.
Requirements. Install a high compressive strength cover board to protect thermal
insulation from damage during service life, or install an enhanced compressive strength
insulation board in a minimum of two staggered layers.
Points: TBD
Technologies and Strategies. Suitable high compressive strength cover boards include
high density wood fiber, perlite, moisture-resistant gypsum board, and high-compressive
foam insulation cover boards as selected and specified by the project designer. Suitable
enhanced compressive strength thermal insulation boards include minimum 25 psi
compressive strength polyisocyanurate, extruded polystyrene (XPS), and expanded
polystyrene (EPS).
Discussion. This credit offers a wide variety of options, including both the use of a cover
board or “bumping up” insulation compressive strength.
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D3 Roof Drainage Design:
Intent. Minimize the potential for moisture intrusion into the roofing system and the
underlying building by assuring that storm water is effectively drained away from the roof
surface.
Requirements. Document that the roofing system maintains a minimum ¼ in 12 slope to
drain throughout the entire roof surface, with a minor allowances for temporary ponding.
Points: TBD
Technologies and Strategies. For both new roofs and re-roofing over existing roofs,
engineered tapered insulation systems may be used to facilitate effective drainage.
Discussion. This credit essentially re-states a current ICC code requirement, but
increased building owner awareness of this requirement may increase compliance as
well as help extend roof and building service life.
D4 Roof Traffic Design:
Intent. Minimize the potential for damage to the roofing system and the underlying
building by assuring that the roof surface is protected from service traffic and that service
traffic is limited to designated areas of the roof.
Requirements. Document that a roof walkway system has been installed that overlays
the roof surface to protect it from damage and that the walkway has been designed to
provide efficient access to all expected service locations on the roof (HVAC units,
exhaust fans, other rooftop equipment).
Points: TBD
Technologies and Strategies. A wide variety of roof walkway materials and systems
are available, including rubber walk pads, concrete pavers, and walkway membrane
rolls. These materials should be installed around every rooftop location requiring periodic
service traffic, and these locations should be interconnected with designated roof access
points.
Discussion. This credit starts to bring to the attention of the building designer and
owner that a variety of strategies are necessary to assure long-term roof system
performance and service life.
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L1 Roof Maintenance Manual
Intent. Provide the building owner with an ongoing information resource for effective
inspection and maintenance of the roofing system in order to help extend roof service
life.
Requirements. Compile and deliver to the owner a comprehensive roof maintenance
manual meeting specific requirements for content and organization. (Specific
requirements to follow)
Points: TBD
L2 Roof Maintenance Agreement
Intent. Establish and maintain a long-term quality partnership to perform inspection and
maintenance of the roofing system in order to help extend roof service life.
Requirements. Document the execution of a roof maintenance agreement between the
building owner (or agent) and a qualified roofing maintenance professional.
Agreement Term:
Points:
1. X-Year Agreement with X-Year Renewability
2. Y-Year Agreement with Y-Year Renewability
TBD
TBD
L3 Product Life Cycle Assessment
Intent. Increase building owner awareness of the life cycle impacts of roofing materials
and encourage participation in the evaluation and selection of roofing systems that
minimize long-term environmental impact.
Requirements. Document the practice of roof life cycle assessment using any or all of
the following strategies:
1. Environmental Product Declaration (EPD):
Utilize roofing products with published Environmental Product Declaration (EPD),
Design for Environment Assessment (DEA) or equivalent assessment.
Number of Product Assessments
Points:
1 or 2 Product Assessments
More than 2 Product Assessments
TBD
TBD
2. Life Cycle Assessment (LCA):
Points: TBD
Provide the building owner with a Life Cycle Assessment of the entire roofing
system, using the Athena EcoCalculator for Building Assemblies, the NIST Building
for Environmental and Economic Sustainability (BEES) software program, or an
equivalent calculation methodology.
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L4 Roof System Renovation Plan
Intent. Extend the effective service life of the roofing system by planning ahead for
anticipated major maintenance, repair or renovation activities.
Requirements. Provide the building owner with a plan for future roof system renovation
and a suggested timetable for this renovation. Plan should include key roof system
features to be refurbished or replaced and recommended installation practices to
complete the refurbishment / replacement.
Points: TBD
L5 Roof System Recycling Plan
Intent. Minimize the long-term environmental impact of the roofing system by planning
ahead for the eventual removal, disposal and recycling of the roofing materials.
Requirements. Provide the building owner with a plan for future roof system removal
and recycling for implementation at the end of the roof’s service life. Plan should include
key roof system materials to be removed and recycled and recommended practices to
complete the recycling process.
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