GIBRALTAR INDUSTRIES INC

(a)Evaluation of Disclosure Controls and Procedures

The Company maintains a system of disclosure controls and procedures (as defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended). Management of the Company, under the supervision and with the participation of the Chief Executive Officer and the Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures as of the end of the period covered in this report. Based upon that evaluation and the definition of disclosure controls and procedures contained in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that as of the end of such period the Company’s disclosure controls and procedures were effective.

(b)Changes in Internal Control over Financial Reporting

The Company implemented a new Enterprise Resource Planning (“ERP”) system for one of the Company's operating units in the Residential segment during the quarter ended March 31, 2024. The implementation of this ERP system is expected to, among other things, improve user access security and automate a number of accounting and reporting processes and activities, thereby decreasing the amount of manual processes previously required. Except for the implementation of this ERP system, there have been no changes in the Company’s internal control over financial reporting (as defined by Rule 13a-15(f) or 15d-15(f) under the Securities Exchange Act of 1934, as amended) that occurred during the period covered by this Quarterly Report on Form 10-Q that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.