Janus International Group Inc

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Directors

Janus International Group, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheet of Janus International Group, Inc. and subsidiaries (the Company) as of December 28, 2024, the related consolidated statements of operations and comprehensive income, changes in stockholders’ equity, and cash flows for the year then ended, and the related notes (collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 28, 2024, and the results of its operations and its cash flows for the year then ended, in conformity with U.S. generally accepted accounting principles.

We also have audited the adjustments to the 2023 and 2022 consolidated financial statements to retrospectively apply the change in accounting related to the Company’s adoption of ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, as described in Notes 2 and 18. In our opinion, such adjustments are appropriate and have been properly applied. We were not engaged to audit, review, or apply any procedures to the 2023 or 2022 consolidated financial statements of the Company other than with respect to the adjustments and, accordingly, we do not express an opinion or any other form of assurance on the 2023 or 2022 consolidated financial statements taken as a whole.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 28, 2024, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated February 26, 2025 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audit included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audit provides a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of a critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Certain service revenues recognized over time using cost-to-cost percentage of completion

As discussed in Notes 2 and 14 to the consolidated financial statements, the Company recognized $154.1 million of services revenue transferred over time within its North America segment for the year ended December 28, 2024. Service revenues are recognized over time as the customer simultaneously receives and consumes the benefits provided by the Company. For revenue recognized over time, the Company utilizes the cost-to-cost input method as the most accurate measure of when goods and services are transferred to the customer. Under this method, the Company estimates the costs to complete individual contracts and recognizes revenue proportionately to the total contract price deemed complete, based on the relationship of costs incurred to date to total anticipated costs.

We identified the evaluation of certain service revenues recognized over time using cost-to-cost percentage of completion as a critical audit matter. Specifically, subjective auditor judgment was required to assess management’s percentage of completion assumptions, which are based on the determination of the status of uncompleted projects and rely on the expertise, experience, and judgment of project management. Changes in the percentage of completion assumptions could have an impact on recognized service revenues.

The following are the primary procedures we performed to address this critical audit matter. We evaluated the design and tested the operating effectiveness of certain internal controls over the Company’s revenue recognition process, including controls related to the development of the percentage of completion assumption for uncompleted contracts. We selected a sample of uncompleted contracts and, for each sampled contract, assessed the percentage of completion assumption used to recognize revenue by:

•reading the underlying contract to obtain an understanding of the contractual requirements

•interviewing and reviewing questionnaires prepared by project management personnel of the Company, and inspecting related documentation, to gain an understanding of project status and factors that should be considered within the percentage of completion assumption

•comparing the percentage of completion assumption for the contract to the Company’s project status assessment.

We have served as the Company’s auditor since 2024.

/s/KPMG LLP

February 26, 2025

Report of Independent Registered Public Accounting Firm

Shareholders and Board of Directors

Temple, Georgia

Opinion on the Consolidated Financial Statements

We have audited, before the effects of the adjustments to retrospectively apply the change in accounting due to the adoption of Accounting Standards Update 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (“ASU 2023-07”), as described in Notes 2 and 18, the accompanying consolidated balance sheet of Janus International Group, Inc. (the “Company”) as of December 30, 2023, and the related consolidated statements of operations and comprehensive income, changes in stockholders’ equity, and cash flows for each of the two fiscal years in the period ended December 30, 2023 (the 2023 and 2022 consolidated financial statements before the effects of the change in accounting due to the adoption of ASU 2023-07 described in Notes 2 and 18 are not presented herein). In our opinion, the 2023 and 2022 consolidated financial statements, before the effects of the adjustments to retrospectively apply the change in accounting due to the adoption of ASU 2023-07 described in Notes 2 and 18, present fairly, in all material respects, the financial position of the Company as of December 30, 2023, and the results of its operations and its cash flows for each of the two years in the period ended December 30, 2023, in conformity with accounting principles generally accepted in the United States of America.

We were not engaged to audit, review, or apply any procedures to the adjustments to retrospectively apply the change in accounting due to the adoption of ASU 2023-07 described in Notes 2 and 18 and, accordingly, we do not express an opinion or any other form of assurance about whether such adjustments are appropriate and have been properly applied. Those adjustments were audited by KPMG LLP.

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s consolidated financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ BDO USA, P.C.

We served as the Company's auditor from 2018 to 2024.

February 28, 2024