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2 This declaration is an environmental product declaration (EPD) in accordance with ISO EPDs rely on Life Cycle Assessment (LCA) to provide information on a number of environmental impacts of products over their life cycle. Exclusions: EPDs do not indicate that any environmental or social performance benchmarks are met, and there may be impacts that they do not encompass. LCAs do not typically address the site-specific environmental impacts of raw material extraction, nor are they meant to assess human health toxicity. EPDs can complement but cannot replace tools and certifications that are designed to address these impacts and/or set performance thresholds e.g. Type 1 certifications, health assessments and declarations, environmental impact assessments, etc. Accuracy of Results: EPDs regularly rely on estimations of impacts, and the level of accuracy in estimation of effect differs for any particular product line and reported impact. Comparability: EPDs are not comparative assertions and are either not comparable or have limited comparability when they cover different life cycle stages, are based on different product category rules or are missing relevant environmental impacts. EPDs from different programs may not be comparable. PROGRAM OPERATOR UL Environment DECLARATION HOLDER Owens Corning DECLARATION NUMBER DECLARED PRODUCT Owens Corning Manufactured by Owens Corning in the United States. REFERENCE PCR PCR Building Envelope Thermal Insulation v1.3 (June 1, 2014) DATE OF ISSUE Novermber 9, 2015 PERIOD OF VALIDITY 5 years Product definition and information about building physics CONTENTS OF THE DECLARATION The PCR review was conducted by: Information about basic material and the material s origin Description of the product s manufacture Indication of product processing Information about the in-use conditions Life cycle assessment results Testing results and verifications PCR Review Panel epd@ulenvironment.com This declaration was independently verified in accordance with ISO by Underwriters Laboratories INTERNAL EXTERNAL This life cycle assessment was independently verified in accordance with ISO and the reference PCR by: Wade Stout, UL Environment Thomas Gloria, Industrial Ecology Consultants

3 Product Definition and Information Product Description Owens Corning products are validated formaldehyde-free, light-density fibrous glass blankets with excellent recovery, designed for use in metal building roofs and walls. They are available in a variety of densities, thicknesses, R-values and laminating capabilities to meet a variety of building needs and code requirements. Final MBI products have a minimum total recycled content of 65%. Certified R Metal Building Owens Corning EcoTouch Insulation for Certified R Metal Building is a light density fibrous glass blanket designed to be laminated with a variety of appropriate facings. Certified R is available in standard R-values of 10, 11, 13, 16, 19, 25 and 30, and is regularly tested for compliance to the NAIMA (Rev. 2000) Standard. Standard roll widths are 36", 48", 60" and 72". MBI Plus Owens Corning EcoTouch Insulation for MBI Plus is a light density fibrous glass blanket designed for use in metal building roofs and walls. The product is intended for installation at the job site and is not designed for lamination. EcoTouch Insulation for MBI Plus is available in standard R-values of 10, 11, 13, 16, 19, 25 and 30. Standard roll widths are 48", 60" and 72". The product has ink jet printing on the surface: MBI Plus INSULATION NOT TO BE LAMINATED for easy identification on the project. Metal Building Utility Blanket Owens Corning Utility Blanket is an unfaced light density fibrous glass blanket. The product is designed to be laminated with a variety of facings and is used for condensation and noise control in metal buildings. The product is available in rolls with widths of 36", 48" and 72" at a nominal product thickness of 2". Manufacturing Locations This Environmental Product Declaration (EPD) represents the production of metal building insulation as manufactured at the Owens Corning Newark Insulation Plant located at 400 Case Ave, Newark, OH and the Waxahachie, Texas (TX) facility located at 3700 N Interstate 35 East Service Rd, Waxahachie, TX The MBI products produced in these facilites are distributed in the North American market. Application and Uses EcoTouch Insulation for Certified R Metal Building is used as part of the insulation system in the roofs and side walls of metal buildings. It is designed to be laminated with a variety of facings to provide attractive interior finishes, abuse resistance, and assistance in control of moisture. EcoTouch Insulation for MBI Plus is used when unfaced insulation is required in various metal building roof or wall systems. EcoTouch Insulation for MBI Plus isn t designed for lamination and generally shipped directly to a job site. Utility Blanket product is laminated with an appropriate facing, the insulation is

4 typically installed in a single layer between the structural members (purlins for roofs and girts for walls) and the exterior panels. In most cases, the product is installed over and perpendicular to the structural members with the facing towards the interior of the structure. Installation Certified R Metal Building Several methods are used to insulate metal buildings. The usual method is to apply the insulation over the structural members (purlins and girts) and inside the exterior panels. This method generally accommodates single layer installations. Methods are also available to apply insulation between purlins so as to accommodate greater insulation thicknesses and better thermal performance. MBI Plus EcoTouch Insulation for MBI Plus is applied between or over the purlins or girts when unfaced insulation is required in the installation process. In a typical double layer roof system, EcoTouch Insulation for MBI Plus will be applied as the second layer of material between the purlins after installing a laminated layer of EcoTouch Insulation for Certified R Metal Building over the purlins. These double layer roof systems accommodate insulation thicknesses and provide additional thermal performance. EcoTouch Insulation for MBI Plus can also be used in any filled cavity insulation system that does not require the insulation to be laminated to a vapor retarder facing. Metal Building Utility Blanket After Utility Blanket is laminated with an appropriate facing, the insulation is typically installed in a single layer between the structural members (purlins for roofs and girts for walls) and the exterior panels. In most cases, the product is installed over and perpendicular to the structural members with the facing towards the interior of the structure. All seams should be sealed to help maintain a continuous vapor retarder. Utility Blanket can also be used over the purlins in roof systems that utilize a primary layer of insulation between the purlins. Material Content Metal Building Insulation products consist of two major components: fiberglass (nominally 85%) and the remainder being the add-on chemicals for binder. The fiberglass is made from various inorganic minerals, which are referred to as batch chemcials. The binder system consists of renewable and non-renewable organic materials. The Certified R Metal Building and Metal Building Utility Blanket may be laminated with a facing material by customers. To that end, the environmental impact of potential facing materials for Certified R Metal Building and Metal Building Utility Blanket are not included in the LCA or this EPD.

5 Table 1: Material Content of Certified R Metal Building & Metal Building Utility Blanket (Newark) Material Function Certified R Metal Building Quantity (mass%) MBI Utility Blanket Quantity (mass%) Non- Renewable Renewable Recycle Material Origin Cullet Batch 25-75% 25-75% North America Sand Batch 5-50% 5-50% North America Borates Batch 10-30% 10-30% Global Silicates Batch <5% <5% North America Soda Ash Batch <15% <15% North America Oxides Batch <5% <5% North America Carboxylic Acid Binder <15% <15% North America Polyol Binder <5% <5% North America Additives Binder <5% <5% North America Table 2: Material Content for MBI Plus Insulation (Newark) Materials Function Quantity (mass%) Non- Renewable Renewable Recycle Material Origin Cullet Glass Batch 25-75% North America Sand Glass Batch 5-50% North America Borates Glass Batch 10-30% North America Silicates Glass Batch <5% North America Soda Ash Glass Batch <15% North America Oxides Glass Batch <5% North America Carboxylic Acid Binder <5% North America Polyol Binder <5% North America Additives Binder <5% North America Table 3: Material Content for Certified R Metal Building and Metal Building Utility Blanket (Waxahachie) Materials Function Certified R Metal Building Quantity (mass%) Metal Building Utility Blanket Quantity (mass%) Non- Renewable Renewable Recycle Material Origin Cullet Glass Batch 25-75% 25-75% North America Sand Glass Batch 5-50% 5-50% North America Borates Glass Batch 10-30% 10-30% Global Soda Ash Glass Batch <15% <15% North America Other Oxides Glass Batch <5% <5% North America Carboxylic Acid Binder <5% <5% North America Polyol Binder <5% <5% North America Additives Binder <10% <5% North America

6 Manufacturing Process Figure 1: Owens Corning General Process Flow for Fiberglass Products Environmental Product Declaration Use of Material and Energy Resources Table 4: Primary Energy Demand per Functional Unit (by Type, Newark & Waxahachie) Environmental Indicator Unit Certified R Metal Building MBI Plus Metal Building Utility Blanket Non renewable, fossil oil, coal, natural gas MJ 1.99E E E+01 Non-renewable, nuclear MJ 3.08E E E+00 Non-renewable, biomass MJ 3.23E E E-02 Renewable, biomass MJ 1.25E E E+00 Renewable, water MJ 1.35E E E-01 Renewable, wind, solar, geothermal MJ 1.12E E E-01 TOTAL Primary Energy Demand MJ 2.45E E E+01

7 Table 5: Primary Energy Demand per Functional Unit (by Resource, Newark & Waxahachie) Environmental Indicator Unit Certified R Metal Building MBI Plus Metal Building Utility Blanket Non-renewable Resources Fossil oil MJ 2.78E E E+00 Natural Gas MJ 1.08E E E+01 Coal MJ 6.20E E E+00 Fossil, other MJ 8.78E E E-01 Nuclear MJ 3.08E E E+00 Biomass MJ 3.23E E E-02 Non-renewable total MJ 2.30E E E+01 Renewable Resources Biomass MJ 1.25E E E+00 Water MJ 1.35E E E-01 Wind MJ 9.59E E E-01 Solar MJ 2.28E E E-05 Geothermal MJ 1.64E E E-02 Renewable Total MJ 1.50E E E+00 TOTAL Primary Energy Demand MJ 2.45E E E+01

8 Figure 2: Non-Renewable Energy Resources by Source for each MBI Product (Newark & Waxahachie) Non-Renewable Resources by Source for Certified R Metal Building 0.14% Non-Renewable Resources by Source for MBI Plus 0.15% 0.38% 14% 12% Fossil oil Natural gas 1% 17% 10% Fossil oil Natural gas Coal Coal 27% 47% Fossil, other Nuclear Biomass 30% 42% Fossil, other Nuclear Biomass Non-Renewable Resources by Source for Metal Building Utility Blanket 0.14% 0.40% 15% 11% Fossil oil Natural gas Coal 28% 46% Fossil, other Nuclear Biomass

9 Figure 3: Renewable Resources by Source for each MBI Product (Newark & Waxahachie) Renewable Resources by Source for Certified R Metal Building 0.00% 1% Renewable Resources by Source for MBI Plus 2% 0.00% 1% 9% 6% Biomass 9% Biomass Water Water Wind Wind Solar Solar 84% Geothermal 88% Geothermal Renewable Resources by Source for Metal Building Utility Blanket 0.00% 1% 9% 6% Biomass Water Wind Solar 84% Geothermal

10 Figure 4: Primary Energy Demand by Life Cycle Stage (Newark & Waxahachie) Primary Energy Demand for Certified R Metal Building 5.5% 0.0% 0.7% Primary Energy Demand for MBI Plus 0.0% 5.0% 0.6% 70.7% 23.0% Raw Materials Manufacturing Transportation Installation End of Life 72.9% 21.4% Raw Materials Manufacturing Transportation Installation End of Life Primary Energy Demand for Metal Building Utility Blanket 0.0% 0.6% 5.0% 22.3% Raw Materials Manufacturing Transportation Installation 72.1% End of Life

11 Life Cycle Assessment Product System and Modeling Life Cycle Functional Unit According to what the applicable PCR dictates, the functional unit of insulation material is: one square meter (m 2 ) of insulation material with a thickness that gives an average thermal resistance R SI = 1 m 2 K/W and with a building service life of 60 years. The R-value is Owens Corning s average value for the service life of the material and is determined by ASTM C518. The United States equivalent R-value for R SI = 1, is 5.68 hr ft 2 ºF/BTU. The functional unit characteristics for the MBI series fiberglass insulation products are presented in Table 6: Table 6: Specifications for 1 m 2, R SI-1, of MBI series insulation material Parameters Average density MBI Certified R MBI Plus MBI Utility Blanket Units pcf kg/m 3 R SI m 2 K/W k Mass for R SI = 1 Thickness for R SI = BTU in/hr ft 2 F W/mK lb/m kg/m in m The reference flow aims to represent the quantified amount of the product(s) necessary for a specific product system to deliver the performance described by the functional unit. The reference flows used in the LCA are as follows: Certified R Metal Building: One square meter (m 2 ) of insulation material with a thickness of inches; MBI Plus: One square meter (m 2 ) of insulation material with a thickness of 1.85 inches; Metal Building Utility Blanket: One square meter (m 2 ) of insulation material with a thickness of inches.

12 Life Cycle Stages Assessed The underlying LCA, which provides the basis for this EPD, has been prepared following the requirements outlined in the applicable PCR. The LCA evaluates the fiberglass insulation by modeling the product life cycle considering the five stages mandated by the applicable PCR: Raw Materials Acquisition Manufacturing Distribution to Fabricator/Customer Installation and maintenance End-of-life (e.g., disposal, reuse, or recycle) Figure 5: Manufacturing process within the Newark, OH & Waxahachie, TX facilities, from the batch melting and binder preparation, to the final packaging.

13 System Boundaries Figure 6: System boundaries Raw Materials Production Transport of Raw Materials (inbound) Manufacturing of Insulation Transport of Manufacturing Waste Disposal of Manufacturing Waste Transport to Laminator (Certified R Metal Building+ MBI Utility Blanket) Installation, Use & Maintenance Building Deconstruction Transport of Packaging Waste Transport of Recovered Material Disposal of Packaging Waste Disposal of Insulation Material Assumptions Assumptions are normal and necessary in conducting life cycle assessment. For the underlying cradle-to-grave LCA, assumptions have been made for both the installation and maintenance phase as well as the end-of-life phase. Assumptions regarding these phases can be found in the respective sections below. Cut Off Criteria The cut-off criteria for including or excluding materials, energy, and emissions data from the study are listed below, as per the applicable PCR. Mass If a flow is less than 2% of the cumulative mass of the model it may be excluded, providing its environmental relevance is not a concern. Energy If a flow is less than 1% of the cumulative energy of the model it may be excluded, providing its environmental relevance is not a concern.

14 Environmental relevance If a flow meets the above criteria for exclusion, yet is thought to potentially have a significant environmental impact, it will be included. Material flows which leave the system (emissions) and whose environmental impact is greater than 2% of the whole impact of an impact category that has been considered in the assessment must be covered. This judgment was made based on experience and documented as necessary. The sum of the excluded material flows must not exceed 5% of mass, energy, or environmental relevance. The application of these criteria in the different life cycle steps is documented in the following sections. Infrastructure and capital goods: Inputs and outputs associated with infrastructure (construction, maintenance and demolition of buildings/plants, road surfaces, transport equipment etc.) are not included. This is based on experience from previous LCAs, where the contribution from these items is negligible due to the long life time of the equipment compared to that from the high production volume of the material during that lifetime. Packaging: Packaging is of a low mass compared to the quantity of product. As such, it has been excluded to reduce data collection efforts. Workforce burdens: Similarly, workforce impacts, such as travel to and from work, washing facilities, accommodation, canteen etc. when considered per processed ton of product, are considered likely to be insignificant and have been excluded. Installation and maintenance: The mass and energy associated with installation and its contribution is below the cut-off rules, and their associated inventory flows have been excluded. This study did not account for the lamination of the product, which is a process that occurs post-manufacturing. When properly installed, the product requires minimal maintenance during its service life. Transportation Data for transportation were obtained from the ecoinvent 3.1 database. The European Emission Standards EURO3 has been chosen for all transport by road, seeing as it is most representative for the current Tier 2 Exhaust Emission Standards in the US. Inbound transportation The inbound transport distances and mode of transport were provided for the batch materials. Inbound transportation distance for the binder materials was not possible to obtain from the purchasing team. Because the binder materials are sourced locally, a conservative value of 100 miles was assumed. This value was tested for sensitivity for each of the products LCAs. Outbound transportation The average transportation distance from the Newark, Ohio facility to the customer location is 700 miles and approximately 400 miles from the Waxahachie, TX facility. Information was not available for any additional distance traveled for the materials from intermediate warehouses to installation location. An average distance of 15 miles was assumed, considering that most of the insulation products are directly shipped to the construction sites.

15 Period under Consideration For the Newark, OH and Waxahachie, TX manufacturing facilities considered in the LCA, Owens Corning primary data was collected for the 2014 calendar year. Data Quality To fulfill data quality requirements and to ensure reliable results, first-hand industry data was used in combination with consistent background LCA information from SimaPro and ecoinvent 3.1, allocation recycled content system model datasets. SimaPro and ecoinvent datasets have been used worldwide for several years in LCA models of many critically-reviewed studies in industrial and scientific applications. For Owens Corning s Newark, OH and Waxahachie, TX facilities analyzed in the underlying LCA study, the data used adequately represents the technology used in 2014 in the United States. Allocation The primary data for the Owens Corning products consists of varying levels of granularity, resulting in the need for allocation. For example, the electricity consumption is metered per manufacturing line, but not per individual product manufactured; this lack of granularity requires the use of allocation to determine the utilities consumed by each different product manufactured in a line. Allocation calculations that were made are consistent with the requirements of the applicable PCR. Mass allocation was the preferred method. However, as per Owens Corning s manufacturing engineers and accounting experts, a second allocation method was deemed necessary: Primary data of raw materials consumption was provided on the facility level instead of the product level, and therefore allocation was required. Mass allocation was deemed the most accurate and reproducible way of calculating the quantity of raw materials consumed to manufacture each product. The mass quantities used to do such allocation were the Bare Glass Pull (BG Pull), Binder Solids and the Actual Weight Packaged (Actual Pack) of final product. These quantities are recorded in Owens Corning s Statistics Database, which gathers the manufacturing records. Primary data of utilities consumption was provided on the facility level instead of the product level, and therefore allocation was required. Machine operating hours (MOH) were used to allocate the utility consumption and other manufacturing impacts (such as air emissions) to each individual product. According to the manufacturing engineers, energy consumption at the furnaces and curing ovens, and related air emissions, are proportional to the time that the machinery is operated to manufacture a product, rather to the mass produced. The effect of mass versus MOH allocation of the manufacturing impacts was analyzed even though a deviation of > 20% in results is not foreseen, and therefore a sensitivity analysis is not required as per the PCR. Manufacturing inputs were allocated to the MBI series insulation products based on machine operating hours (MOH) of the appropriate operating line, per the facility data guidance. MOH and total annual production (actual packaged material) per MBI product were quantified in this study.

16 Use Stage As discussed above, the installation and maintenance impacts are limited to the packaging waste generation during installation. Packaging has been excluded from this study since these materials fall under the cut-off rules, and therefore no impacts will occur in the installation and maintenance phase. End-of-Life Multiple end-of-life scenarios exist for fiberglass insulation (e.g., recycle, reuse, or disposal). No formal programs currently exist for recycling or re-using fiberglass insulation. It is assumed that no recycling occurs at end-of-life and that all construction waste is sent to landfill. The average distance from the demolition site to the construction material landfill is assumed to be 100 miles by use of an industrial garbage truck. The end life consists of the transportation by truck for an assumed 100 miles to the landfill facility, up to but not including landfill for disposal. Life Cycle Assessment- Product Material Content The LCA results the fiberglass insulation by modeling the product life cycle considering the five stages mandated by the applicable PCR: Raw Materials Acquisition (batch and binder) Manufacturing Transportation (in-bound transportation and distribution) Installation and maintenance (not including contribution from lamination or installation) End-of-life (eg., disposal, reuse, or recycle) Table 7: Cradle-to-Gate Life Cycle Impact Assessment Results for Functional Unit of One Square Meter, Certified R Metal Building insulation material, for 1m 2 with R SI=1 (Newark & Waxahachie) Impact category Unit Total Raw Materials Transportation Manufacturing Installation and Maintenance End-of-life Global warming kg CO2 eq 1.45E E E E E E-02 Acidification kg SO2 eq 8.95E E E E E E-05 Eutrophication kg N eq 3.46E E E E E E-06 Smog kg O3 eq 8.20E E E E E E-03 Ozone depletion kg CFC-11 eq 1.96E E E E E E-09

17 Table 8: Cradle-to-Gate Life Cycle Impact Assessment Results for Functional Unit of One Square Meter, MBI Plus insulation material, for 1m 2 with R SI=1 (Newark) Impact category Unit Total Raw Materials Transportation Manufacturing Installation and Maintenance End-of-life Global warming kg CO2 eq 1.84E E E E E E-02 Acidification kg SO2 eq 1.23E E E E E E-05 Eutrophication kg N eq 4.54E E E E E E-06 Smog kg O3 eq 1.03E E E E E E-03 Ozone depletion kg CFC-11 eq 2.34E E E E E E-09 Table 9: Cradle-to-Gate Life Cycle Impact Assessment Results for Functional Unit of One Square Meter, Metal Building Utility Blanket insulation material, for 1m 2 with R SI=1 (Newark & Waxahachie) Impact category Unit Total Raw Materials Transportation Manufacturing Installation and Maintenance End-of-life Global warming kg CO2 eq 2.17E E E E E E-02 Acidification kg SO2 eq 1.36E E E E E E-05 Eutrophication kg N eq 5.20E E E E E E-05 Smog kg O3 eq 1.18E E E E E E-03 Ozone depletion kg CFC-11 eq 2.91E E E E E E-09

18 How to Calculate Environmental Impact Values for R Values other than the Functional Unit. Table 10: Impact category values for 1m 2 of Certified R Metal Building insulation material at various R SI values (Newark & Waxahachie) Thickness (inch) R SI m2 K/W Global Warming kg CO 2 eq Acidification kg SO 2 eq Eutrophication kg N eq Smog Creation kg O 3 eq Ozone Layer Depletion kg CFC-11 eq E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E-06 Table 11: Impact category values for 1m 2 of MBI Plus insulation material at various R SI values (Newark) Thickness (inch) R SI m 2 K/W Global Warming kg CO 2 eq Acidification kg SO 2 eq Eutrophication kg N eq Smog Creation kg O 3 eq Ozone Layer Depletion kg CFC-11 eq E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E-06 Table 12: Impact category values for 1m 2 of Metal Building Utility Blanket insulation material at various R SI values Thickness (inch) R SI m2 K/W Global Warming kg CO 2 eq (Newark & Waxahachie) Acidification kg SO 2 eq Eutrophicatio n kg N eq Smog Creation kg O 3 eq Ozone Layer Depletion kg CFC-11 eq E E E E E E E E E E-07

19 Water Consumption and Non-Hazardous Waste The water consumed and waste generated over the cradle-to-gate life cycle of metal building insulation is shown in the table below. The values, which are applicable for the functional unit amount of insulation, have been calculated for each of the MBI insulation products. Water usage Table 13: Water usage (m 3 ) & Waste-to-landfill (kg) for 1m 2 of insulation material Unit at R SI = 1 (Newark & Waxahachie) Certified R Metal Building insulation 1m2, RSI-1 MBI Plus insulation 1m2, RSI-1 MBI Utility Blanket insulation 1m 2, R SI -1 Water m E E E-04 MBI Plus MBI Utility Blanket Certified R Metal Building Waste Unit 1m 2 insulation insulation, R SI -1 1m 2, R SI -1 1m2, RSI-1 Waste to landfill kg Hazardous waste kg 4.95E E E-06 References Product Category Rules for Preparing an Environmental Product Declaration (EPD) for Product Group: Building Envelope Thermal Insulation, Version 1.3, June 1, 2014 Pub. No Owens Corning. All Rights Reserved.