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LEED Prerequisites

Category Prerequisite Description
Sustainable Sites SS Prerequisite 1 Reduce potential construction-related soil erosion, waterway sedimentation and dust.
Energy & Atmosphere* EA Prerequisite 1 Fundamental commissioning of building energy systems
EA Prerequisite 2 Meet the minimum energy performance standards in ASHRAE 90.1-2004
EA Prerequisite 3 HVAC units cannot contain CFC-based refrigerants
Materials & Resources MR Prerequisite Establish an area on the job site for recycling of building materials.
Indoor Environmental Quality EQ Prerequisite 1 A minimum level of Indoor Air Quality performance must be met to enhance IAQ in buildings, in order to contribute to the comfort and well-being of the occupants, with a ventilation system that meets the ASHRAE 61.1-2004 standard for Ventilation for Acceptable Indoor Air Quality.
EQ Prerequisite 2 Environmental Tobacco Smoke (ETS) Control by prohibiting smoking in the building, locate any exterior smoking areas at least 25 feet from entrances, air intakes and operable windows. Another option is to contain, capture and remove tobacco smoke from a room for smoking. In residential buildings, the transfer of tobacco smoke between units must also be addressed by sealing wall, ceiling and floor penetrations.

*Note: There are also two prescriptive compliance paths that LEED offers to project teams, including following the ASHRAE Advanced Energy Design Guide for Small Office Buildings 2004 for 4 LEED points. The second prescriptive path option offers 1 point toward LEED certification through compliance with the Basic Criteria and Prescriptive Measures of the Advanced Buildings Benchmark™ Version 1.1 with some exceptions and restrictions.

Arch LEED Matrix

Category Credit Description Award Points LEED Requirements Arch High Performance Glass Options Arch Architectural Aluminum Arch Laminated Units Added Benefits
Sustainable Sites SS Credit 7 Heat Island Affect: Non-Roof 1

Reduce heat islands (thermal gradient differences between developed and undeveloped areas) minimize the impact on a regional climate, and human and wildlife dwellings.

Requirements 7: Any exterior surface used to shade the project boundaries must have an SRI (Solar Reflectance Index) of at least 29.

The high reflectant properties of Arch glazing systems can reduce the potential for heat absorption within the site to minimize any disturbance to the local climate. Arch aluminum framing can provide an opaque or glass parking cover or other shade structure with an high-albedo glazing system to potentially improve SRI values. Solar emissivity and reflectivity can be controlled through custom fabricated LU from Arch This credit can qualify for an innovation point for exemplary performance by demonstrating 100% of non-roof impervious surfaces have been constructed with high-albedo materials.
SS Credit 8 Light Pollution Reduction 1

Minimize the impact of a building's interior and exterior lighting, glare and sky-glow on nocturnal habitats within four levels of development densities (rural, residential, high-density, city).

Requirements 8: For interior lighting: angle interior lighting sources away from exteriors to avoid candela leaving through the windows or place lights on automatic timer for non-business hours.

Arch glass come with coatings and interlayers to block exit of light from interiors. Arch glass and aluminum systems can potentially reduce horizontal luminance values and vertical footcandles from exiting the design area and retain lighting within project boundaries. Arch LU can be fabricated for low-reflectance to mute lighted interior surfaces. Additional interior decorative laminated glass products such as VISUAL can provide an additional opaque light barrier to potentially reduce light emitting from the structure.
Energy & Atmosphere EA Credit 1 Optimize Energy Performance 1 - 10

Achieve increasing levels of energy performance above the baseline in the prerequisite standard to reduce environmental and economic impacts associated with excessive energy use.

Optimized Energy Performance: Whole Building Energy Simulation
Demonstrate a percentage improvement in the proposed building performance rating compared to the baseline building performance rating per ASHRAE/IESNA Standard 90.1-2004 (without amendments) by a whole building project simulation using the Building Performance Rating Method in Appendix G of the Standard. The minimum energy cost savings percentage for each point threshold is as follows:

Arch has access to glasses that can increase the performance of the glazing, reducing the energy demand on the HVAC. Calculations are available. Arch manufactures thermally broken store front and curtain wall system for improved energy performance. Arch has the widest range of thermal doors. Arch offers laminated units with Low-E interlayers for improved energy performance and safety. Building orientation and specifiying window systems with gas filled double-glazing, glass coatings and thermally improved edge spaces, especially for south-facing windows, can further enhance energy performance.
New Buildings Existing Building Renovations Award Points


3.5% 1
14% 7% 2
17.5% 10.5% 3
21% 14% 4
24.5% 17.5% 5
28% 21% 6
31.5% 24.5% 7
35% 28% 8
38.5% 31.5% 9
42% 35% 10
Materials & Resources MR Credit 3.1 Materials Reuse: Specify 5% 1

Reuse building materials and products in order to reduce demand for virgin materials and to reduce waste, thereby reducing impacts associated with the extraction and processing of virgin resources.

Requirements 3.1: Specify salvaged, refurbished or reused materials such that the sum of these materials constitutes at least 5%, based on cost, of the total value of materials on the project.

Requirements 3.2: Specify salvaged, refurbished or reused materials for an additional 5% beyond MR Credit 3.1 (10% total based on cost).

Potential Technologies & Strategies
Identify opportunities to incorporate salvaged materials into building design and research potential material suppliers. Consider salvaged materials such as beams and posts, flooring, paneling, doors and frames, cabinetry and furniture, brick and decorative items.

Resource Reuse
Arch offers a wide range of high-performance Insulated Glass units that can be re-glazed into salvaged aluminum frames for improved energy performance.
The long-lasting qualities of Arch aluminum frames provides creative options for their reuse in both interior design schemes and exterior enclosure systems. In calculating the cost of materials, LEED permits a reclaimed product to be calculated at the higher new product cost. The life span of Arch aluminum products, including its shower doors, can reduce first costs of construction through resale from credible salvage vendors.
MR Credit 3.2 Materials Reuse: Specify 10% 1
MR Credit 4.1 Recycled Content 10% (post-consumer + 1/2 pre-consumer) 1

Increase demand for building products that incorporate recycled content materials, thereby reducing impacts resulting from extraction and processing of virgin materials.

Requirements 4.1: Use materials with recycled content such that the sum of post-consumer recycled content plus one-half of the pre-consumer content constitutes at least 10% (based on cost) of the total value of the materials in the project.

Requirements 4.2: Use materials with recycled content such that the sum of post-consumer recycled content plus one-half of the pre-consumer content constitutes and additional 10% beyond MR Credit 4.1 (total of 20%, based on cost) of the total value of the materials in the project.

Recycled Content
Arch uses glass manufactured with a minimum of 20% post industrial recycled content
Recycled Content
Arch extrusions are produced with 45% prime, 49% post industrial, 6% post consumer recycled
Recycled Content
PVB suppliers recycle 30% post industrial recycled.
This credit category can qualify for an Innovation in Design point for exemplary performance.
MR Credit 4.2 Recycled Content 20% (post-consumer + 1/2 pre-consumer) 1
MR Credit 5.1 Local/Regional Materials 10% Extracted, Processed & Manufactured Regionally (for LEED v. 2.2) 1

Increase demand for building materials and products that are extracted and manufactured within the region, thereby supporting the use of indigenous resources and reducing the environmental impacts resulting from transportation.

Requirements 5.1: Specify building materials or products that have been extracted, harvested or recovered, as well as manufactured, within 500 miles of the project site for a minimum of 10% (based on cost0 of the total materials value. If only a fraction of a product or material is extracted/harvested/recovered and manufactured locally, then only that percentage (by weight) shall contribute to the regional value.

Requirements 5.2: Specify a total of 20% based on cost of the total material value.

Wood crating used in delivery of glazing is reused or ground for landscape mulch.   Aluminum building materials are lighter for reduced fossil fuel consumption and carbon emissions during transportation.

Arch has 32 plants located strategically to be within 500 miles of most major markets

Arch is constantly reevaluating its packaging materials to reduce a freight carriers weight dependence on fossil fuels.

MR Credit 5.2 Local/Regional Materials 20% Extracted, Processed & Manufactured Regionally (for LEED v. 2.2) 1
MR Credit 6 Rapidly Renewable Materials 1

Reduce the use and depletion of finite raw materials and long-cycle renewable materials by replacing them with rapidly renewable materials.

Requirements 6: Use rapidly renewable building materials and products (made from plants that are typically harvested within a ten-year cycle or shorter) for 2.5% of the total value of all building materials and products used in the project, based on cost.

Arch is researching bio-based plastics from sources such as corn starch for its new generation of spacer technology. Sustainably forested wood strengthens Arch aluminum composite framing systems. Non-petroleum-based interlayers are currently under development from agricultural products taking less than 10 years to mature. Renewable Materials
Arch can contribute as all wood used is supplied in accordance with (SFI)
MR Credit 7 Certified Wood 1

Encourage environmentally responsible forest management.

Requirements 7: Use a minimum of 50% of wood-based materials and products, which are certified in accordance with the Forest Stewardship Council's (FSC) Principles and Criteria, for wood building components. These components include, but are not limited to, structural framing and general dimensional framing, flooring, sub-flooring, wood doors and finishes.

Arch provides field service to verify project requirements and installation assistance for all phases of construction. Sustainable wood for framing are treated free from reliance on petroleum intensive processes. Arch LU are appropriately sealed and storage instructions provided to avoid ambient moisture from altering the benefits of their wood components. Certified Wood
Arch can contribute as lumber used is harvested in accordance with the (FPC) Forest Practical Code
Indoor Environmental Quality   Daylight & Views  

Provide for the building occupants a connection between indoor spaces and the outdoors through the introduction of daylight views into the regularly occupied areas of the building

Requirements 8.1: Achieve a minimum daylight factor of 2% (excluding all direct sunlight penetration) in 75% of all spaces occupied for critical visual tasks. Spaces excluded from this requirement include copy rooms, storage areas, mechanical plant rooms, and laundry rooms and other low occupancy support areas. Other expectations for space where tasks would be hindered by the use of daylight will be considered on their merits. There are three options for compliance with the Credit Category (1) calculation of the glazing factor, (2) computer simulation showing 25 footcandles has been achieved in at least 75% of all occupied areas, (3) or measurement of the indoor light levels meeting the minimum requirements of 25 footcandles within the occupied space.

Requirements 8.2: Achieve direct line of sight to vision glazing for building occupants in 90% of all regularly occupied spaces. Examples of exceptions include copy rooms, storage areas, mechanical, laundry and other low occupancy support areas. Other exceptions will be considered on their merits.

Low-VOC sealants are applied during manufacturing for less offgassing during construction and over the life span of the enclosed structure. Arch frames can assist in moisture control for better IAQ by eliminating a major component for mold growth. Arch Laminated units allow daylight to secure areas that typically in the past could not afford to have glass and glazing. Evaluation of adhesives and sealants for their sustainable design attributes is an ongoing task at Arch.
EQ Credit 8.1 Daylight 75% of Spaces 1
EQ Credit 8.2 Views 90% of Spaces 1
Innovation & Design Process ID Credit 1.1 Innovation in Design: Daylighting 1

To reward project teams for exceptional performance above the requirements set by the LEED-NC Green Building Rating System and innovative performance in categories not addressed by LEED.

Requirements 1: A written proposal identifying the intent and requirements for compliance, submittals, and the design strategies to be applied for energy performance, water efficiency, and environmental and health benefits.

Arch fabricates electrochromonic glass products for regulation of solar light into the enclosed space based on seasonal or geographical climate conditions. Framing options for electrochromonic glass include powder coatings applied during an energy efficient manufacturing process. Electronically tintable multi-pane units regulate visible light transmittance and solar heat gain to compliment daylighting, interior thermal mass temperature modulation, and other sustainable design strategies. As the Embedded Energy of products is incorporated into emerging LEED standards for Life Cycle Analysis, powder coated glazing frames and the lower energy requirements of recycling aluminum compared to producing it from raw materials will be lower.
ID Credit 1.2 Innovation in Design: Water Conservation 1 Arch fabricates its products in 32 facilities utilizing water reclamation for many of its processes. Environmental stewardship could provide LEED points in upcoming versions of the program that account for the life cycle analysis, resource usage and energy considerations of the manufacturing process. Recycled wastewater utilized in the fabrication processes greatly reduces the impact on potable water from natural sources and eases wear and tear on discharge infrastructure. The manufacturing process is continual monitored to limit the lowest responsible amount of water resources needed for cooling and finishing of Arch products. Arch has historically taken a leadership role in continually auditing the environmental impacts of its business practices.
ID Credit 1.3 Innovation in Design: IAQ 1 Intelligent design of Arch's new generation of spacers can limit the exposure of the interior space to moisture for a reduced potential for mold and improved indoor air quality. Curtain wall innovations with warm spacer technology can avoid condensation problems at window edges and can incorporate a thermal break for added energy efficiency. New technology for edge spacers are more durable and designed to improve insulation and reduce condensation. New Arch products protect the occupants of an indoor environment from windborne, seismic or ballistic threats.


Points toward the LEED Green Building Rating System are not awarded on the basis of products but on the building performance achieved through sustainable design, construction and operations of buildings, which can include the use of sustainable materials, products and assemblies offered by Arch Aluminum & Glass. 

The above LEED credit section references are for suggested applications of Arch products.  The LEED applicant is ultimately responsible for determining the product attributes that will help enhance energy efficiency and reduce the environmental impact and, therefore, provide LEED-certification of a structure. The Arch products covered in this guideline can assist building teams in obtaining LEED points as long as the overall design meets or exceeds the LEED performance standards.

The final decision on LEED compliance ultimately relies on the judging panel at USGBC. The role of the architect, designer, contractor or other member of the team is to document a building’s sustainable design, construction, operation and performance data, and to make that data available to the USGBC. Arch recommends project teams employ a  LEED Accredited Professional to compile the necessary documentation for review and submittal to the USGBC for a positive outcome.

Arch glazing and extruded aluminum products can perform at higher levels beyond the scope of the standards in the LEED rating system. In such cases, project teams have several options when specifying  Arch high performance architectural systems, including a request for a Credit Interpretation Ruling (CIR) from the USGBC Technical and Scientific Advisory Committee. Another strategy is to document the exemplary performance of Arch assemblies from a whole building design perspective in the LEED Innovation in Design credit category.