About Us

Headquartered in Freeburg, MO, Quaker Windows & Doors was founded in 1949. Currently guided by the 2nd generation, all female ownership team of Pam Knoll, Carlotta Kaesik, Mary Knoll, and Judy Stone, these ladies have created a familial culture and guide this company with a passion and vision for the future. A company dedicated to pioneering innovative products, patented structural/thermal technologies, and visual appeal for both homes and buildings, Quaker Windows & Doors has risen to become a leading manufacturer of window and door solutions for residential, luxury and commercial projects across the United States. 

Quaker Windows & Doors consists of three divisions: Quaker Residential, Quartz Luxury Residential, and Quaker Commercial. We provide high quality architectural grade products for homes, businesses, multi-family, historic, hospitality, and commercial projects up to 30 floors.

Boasting a workforce of over 1,500 employees distributed across our two campus locations, Quaker Windows & Doors has earned notable accolades such as Missouri’s Best Large Employer for several years running, and Best Window Company. Furthermore, Quaker's consistent expansion has earned it a spot on the Inc. 5000 list of the fastest-growing privately held companies in America, demonstrating that its growth trajectory shows no signs of slowing.