CertainTeed-branded Windows are now manufactured by MI Windows and Doors.
MI Windows and Doors
Attn: Customer Care
650 West Market St
Gratz, PA 17030
(866)-710-4524
Attn: Customer Care
650 West Market St
Gratz, PA 17030
(866)-710-4524
Warranty questions? Please contact MI Windows and Doors directly:
CertainTeed-branded Windows - East of the Rockies
Windows installed in or prior to September 2007
(888) 454-7218
Windows installed in or prior to September 2007
(888) 454-7218
Windows installed after September 2007
(717) 365-2500
CertainTeed-branded Windows – West of the Rockies
(888) 975-9436