Guardian

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410-793-4780​

Guardian, in partnership with Diligent Window Supply, stands as a premier manufacturer of top-tier entry and security door products. Our commitment to excellence shines through as we craft durable, enduring doors that enhance your home’s beauty and efficiency for years to come. With Guardian and Diligent Window Supply, quality is our hallmark.

Entry System

The Harmony 100 Series double hung window is designed to enhance your home’s appearance while increasing its comfort level. The contour look of the welded master frame offers a more traditional wood window exterior appearance.

Security Storm Door

Enhance the appearance of your entryway while providingsecurity and peace of mind. Heavy gauge steel ensures the most reliable protection against intruders. Custom-fit to your opening, our doors also effectively insulate againstdrafts which can mean big savings on your energy bills.

Patio Doors

Select from a wide variety of superior steel and fiberglass swinging patio door units. Many of our custom-fitted patio door units offer ENERGY STAR qualified options, extensive lifetime warranties; as well as various colors, hardware, and designs to choose from.

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