PGT Innovations (PGTI) 8-K/A Report on the Financial Statements

Exhibit 23.1

Consent of Independent Auditor

We consent to the incorporation by reference in Registration Statement Nos.333-196048,333-166075,333-146719, and333-135616 on FormS-8 of PGT Innovations, Inc., of our reports dated March 23, 2018 and March 20, 2017 relating to the consolidated financial statements of GEF WW Parent LLC and Subsidiaries appearing in this Current Report on Form8-K/A.

/s/ RSM US LLP

Phoenix, Arizona

September 10, 2018