Mon-Ray, Inc., is a privately owned corporation. Our corporate and national sales offices are located in Minneapolis, MN.  Our manufacturing plant is located in Osage, IA.

Mon-Ray, Inc., is the exclusive manufacturer of DeVAC aluminum windows, Mon-Ray storm windows, Mon-Ray storm doors and Glasswalls porch enclosures. For over 50 years, each has become known for their unique features and long-term benefits not available in other window and door products.

We sell our products throughout the United States primarily through our network of Authorized Dealers. We also sell to independent contractors and builders or directly to commercial building owners and residential homeowners in areas not serviced by an Authorized Dealer. Since 1947 the business has operated a company-owned Residential Dealership, Mon-Ray Windows, Doors & More, in the greater Minneapolis area.

We have earned the reputation as a “Total Service” window manufacturer. We back all the window and door products we manufacture with a written Ten Year (10) Limited Product Warranty, that is fully transferable and non-prorated. We are recognized within our industry as a leader in establishing high performance standards, specializing in Energy Conservation, Environmental Protection, Historical Restoration and Sound Abatement.

We believed when our business was founded, just as we believe now, “The True Test of Quality is the Test of Time.”

Learn more about our philosophy...