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We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the NCI Building Systems, Inc.’s Long Term Incentive Plan of our report dated December 19, 2018, except with respect to the effects of the change in the composition of reportable segments, change in the income statement presentation of service cost and other components for defined benefit pension and other postretirement benefit plans, and change in presentation of restricted cash in the statement of cash flows as to which the date is February 19, 2019, with respect to the consolidated financial statements of Cornerstone Building Brands, Inc. (formerly named NCI Building Systems, Inc.) for the year ended October 28, 2018, included in its Annual Report (Form 10-K) for the year ended December 31, 2020, filed with the Securities and Exchange Commission.