GMS Results Presentation Deck

End Market & Product-Level Expectations for Q2 FY2024 Product Category Q2 FY24 YOY Volume Expectations Wallboard Ceilings Steel Framing Complementary Products Multi-family: Up high single-digits Single-family: Down low double-digits Commercial: Up low single-digits Total Wallboard: Down low single-digits Up low single-digits Up high single-digits Up* GMS GYPSUM MANAGEMENT & SUPPLY INC ● *Sales growth in Complementary Products, including the benefits of recent acquisitions, is expected to be up mid single-digits. Q2 FY24 YOY Price/Mix Expectations Down low single-digits Down low single-digits Down -25% Up* Vaa 12 TE/BA/AL.EL 1/2 - 12: TEMBA 12-12 TE/BA 7/21 -12 TEMBA Vat- 12 TEBA 1/2-12 TE/BA ww HOTEL AN MOVAL.EL MURAL 90/EL.CL* 7 MOTELLE CHORA. TEMAHO/BL.EL. 8

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