Frequently Asked Questions

  • Are you licensed and insured?

    Yes, Stateline Windows and Doors is fully licensed and insured. We're backed by strong manufacturer warranties for your peace of mind.

  • Do you offer free estimates?

    Yes, we provide free quotes and design consultations. We also offer free in-home estimates for window replacement projects.

  • What window types do you install?

    We install double-hung, casement, slider, picture, bay, bow, awning, garden, and custom specialty windows in various materials.

  • What door options are available?

    We offer front entry doors, patio doors, sliding glass doors, French doors, storm doors, and interior doors in multiple materials.

  • What siding materials do you offer?

    We install vinyl siding, fiber cement, LP SmartSide®, and insulated siding options with modern colors and woodgrain textures.

  • Do you serve Machesney Park?

    Yes, we serve Machesney Park and surrounding Winnebago County communities including Loves Park, Cherry Valley, and Roscoe.

  • What's your experience level?

    We have decades of combined experience in window and door installation, replacement, and repair as a family-owned local company.

  • Are your products energy efficient?

    Yes, we offer Energy Star-rated windows and doors with Low-E coatings and Argon gas insulation for Midwest climate performance.