United States securities and exchange commission logo May 26, 2021 Timothy F. Murphy Senior Vice President and Chief Financial Officer Gibraltar Industries, Inc. 3556 Lake Shore Road Buffalo, New York 14219 Re: Gibraltar Industries, Inc. Form 10-K for the Fiscal Year Ended December 31, 2020 Filed February 25, 2021 File No. 000-22462 Dear Mr. Murphy: We have limited our review of your filing to the financial statements and related disclosures and have the following comments. In some of our comments, we may ask you to provide us with information so we may better understand your disclosure. Please respond to these comments within ten business days by providing the requested information or advise us as soon as possible when you will respond. If you do not believe our comments apply to your facts and circumstances, please tell us why in your response. After reviewing your response to these comments, we may have additional comments. Form 10-K for the Fiscal Year Ended December 31, 2020 Notes to the Financial Statements (6) Acquisitions, page 52 1. We note your company purchased all the outstanding stocks of TerraSmart LLC for the consideration of $228.2 million on December 31, 2020. Please provide us with an analysis that you are not required to file Rule 3-05 financial statements and pro forma financial information under Article 11 of Regulation S-X. 2. During 2020, your company purchased substantially all of the assets of Architectural Mailboxes LLC, Delta Separations, LLC, and Thermo Energy Systems, Inc in three separate transactions. We also note the aggregate purchase price was $81.2 million, resulting in $58.3 million in goodwill under purchase accounting. Please explain to us why these acquisitions are subject to accounting under ASC 805. Please provide us with Timothy F. Murphy Gibraltar Industries, Inc. May 26, 2021 Page 2 analyses based on the criteria described in ASC 805-10-55-3A through 55-6 and 805-10- 55-8 through 55-9. 3. As for your company's acquisition of substantially all of the assets of Thermo Energy Systems, Inc., please explain why the acquisition resulted in $18.7 million of goodwill when the purchase price was $7.3 million. In closing, we remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. You may contact Andi Carpenter at 202-551-3645 or John Cash, Accounting Branch Chief at 202-551-3768 with any questions. FirstName LastNameTimothy F. Murphy Sincerely, Comapany NameGibraltar Industries, Inc. Division of Corporation Finance May 26, 2021 Page 2 Office of Manufacturing FirstName LastName