Owens Corning

2. SEGMENT INFORMATION

The Company hasfour reportable segments: Roofing, Insulation, Doors and Composites. Accounting policies for the segments are the same as those for the Company. The Company’sfour reportable segments are defined as follows:

Roofing – Within our Roofing segment, the Company manufactures and sells residential roofing shingles, oxidized asphalt materials and roofing components primarily used in residential and commercial construction.

Insulation – Within our Insulation segment, the Company manufactures and sells thermal and acoustical batts, loosefill insulation, spray foam insulation, foam sheathing and accessories. It also manufactures and sells glass fiber pipe insulation, energy efficient flexible duct media, bonded and granulated stone wool insulation, cellular glass insulation and foam insulation used in above- and below-grade construction applications.

Doors - Within our new Doors segment, the Company manufactures and sells interior and exterior doors and door systems primarily used in residential construction.

Composites – Within our Composites segment, the Company manufactures, fabricates and sells glass reinforcements in the form of fiber. Glass reinforcement materials are also used by the Composites segment to manufacture and sell high value applications in the form of non-wovens, fabrics and composite lumber.

The following tables show a disaggregation of our net sales by segment and geographic region. Corporate eliminations (shown below) largely reflect intercompany sales from Composites to Roofing. External customer sales are attributed to geographic region based upon the location from which the product is sold to the external customer.

Our contracts with customers are broadly similar in nature throughout our reportable segments, but the amount, timing and uncertainty of revenue and cash flows may vary in each reportable segment due to geographic and end-market economic factors.

Sales to major customer- The Company had two customers that exceeded 10% of consolidated net sales for the twelve months ended December 31, 2024. The first customer, which is a customer of the Roofing, Insulation and Doors segments, accounted for approximately 13% of the Company's consolidated net sales in 2024. The second customer, which is a customer of both the Roofing and Insulation segments, accounted for approximately 11% of the Company's consolidated sales in 2024 and 2023. No individual customers accounted for 10% or more of consolidated sales in 2022.

In the United States, sales are primarily related to the residential housing market and commercial and industrial applications. Residential market demand is driven by housing starts and repair and remodeling activity (influenced by existing home sales, seasonal home improvement and damage from major storms). Significant portions of our residential products across ourfour reportable segments are used interchangeably in both new construction and repair and remodeling, and our customers typically distribute (or use) the products for both applications. U.S. commercial and industrial revenues are largely driven by U.S. industrial production growth, commercial construction activity and overall economic conditions in the U.S.

Outside of the United States (Europe, Asia-Pacific and Rest of world), sales are primarily related to commercial and industrial applications and, to a lesser extent, residential applications in certain countries. Throughout the international regions, demand is primarily driven by industrial production growth, commercial construction activity and overall economic conditions in each respective geographical region.

EARNINGS BEFORE INTEREST AND TAXES

The Company identifies the Chief Executive Officer as the chief operating decision maker ("CODM"). In applying the criteria set forth in the standards for reporting information about segments in financial statements, we have determined that we have four reportable segments – Roofing, Insulation, Doors and Composites. The key factors used to identify these reportable segments are the organization and alignment of our internal operations and the nature of our products. The CODM uses Earnings Before Interest and Taxes ("EBIT") for each reportable segment to assess segment performance and make decisions on the allocation of resources. Segment EBIT targets are established on an annual basis and used by the CODM throughout the year to compare with actual results. Quarterly forecasts supplement annual targets and provide incremental information utilized to assess the performance of a segment. Segment EBIT variance analysis further provides insight into segment operational cost optimization.

The Company does not regularly provide significant segment expense detail to the CODM. EBIT by segment consists of net sales less related costs and expenses, which are mainly comprised of cost of sales and marketing and administrative costs. EBIT is presented on a basis that is used internally for evaluating segment performance. Certain items, such as general corporate expenses or income and certain other expense or income items, are excluded from the internal evaluation of segment performance. Accordingly, these items are not reflected in EBIT for our reportable segments and are included within Corporate, Other and Eliminations.

The following table summarizes EBIT by segment:

TOTAL ASSETS AND PROPERTY, PLANT AND EQUIPMENT

The following table summarizes total assets by segment:

The following table summarizes total property, plant and equipment, net by geographic region:

Property, plant and equipment, net in any single country, excluding the United States, was less than 10% of consolidated property, plant and equipment, net.

DEPRECIATION AND AMORTIZATION EXPENSE

The following table summarizes the depreciation and amortization expense by segment:

(a)In 2024, 2023 and 2022, General corporate depreciation and amortization expense included $13 million, $101 million and $26 million, respectively, of accelerated depreciation and amortization related to restructuring actions further explained in Note 13 to the Consolidated Financial Statements.

ADDITIONS TO PROPERTY, PLANT AND EQUIPMENT

The following table summarizes cash paid for property, plant and equipment by segment: