Jefnik Windows and Doors is your source for new doors, replacement doors, new windows and replacement windows. We provide sales and installation of steel doors, fiberglass doors, patio doors, vinyl, aluminum, fiberglass and wooden standard and custom windows, awning windows, casement windows, single-hung windows, double-hung windows, single-sliding windows, double-sliding windows and picture windows, all available in custom shapes and sizes and in a variety of colour finishes. Jefnik Windows and Doors is based in Mississauga Ontario and proudly serves Mississauga, Oakville, Brampton, Etobicoke, Toronto and the surrounding GTA.

Quality Windows and Doors. | Expert, reliable installation. | Fair, honest pricing. | Satisfaction guaranteed.

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Windows and Doors Done Right

Why Choose Jefnik Windows and Doors?

  • Over 40 years of industry experience
  • Expert craftsmanship, installation and finishing
  • Honest, reliable, respectful staff
  • Fair, up front pricing, no surprises
  • Customer satisfaction guaranteed

JefNik Windows and Doors

Window Installations

Our windows are custom manufactured for your home. With a complete line of casement, awning, single & double hung, as well as fixed windows, Jefnik windows are beautiful, durable and the perfect choice for any new construction or home renovation. Depending on your needs, our windows are made available in a variety of materials including vinyl, aluminum, fiberglass and wood.

Door Installations

Jefnik door systems are manufactured with the highest quality to provide beauty, style and security to accent your home or business. Single doors, double doors, doors with 1 and 2 sidelites, or custom shapes, our doors are available in steel and fiberglass. Jefnik Windows & Doors deals exclusively in MasterGrain Fiberglass door systems

JefNik Windows and Doors
JefNik Windows and Doors


Exterior Cladding & Metal Work

We specialize in all types of custom exterior cladding & metal work. Give us a call to discuss how we can help you with your exterior renovation project. We'll come out to take a look at your home, discuss your needs, answer your questions and provide a quote to make your home look great long into the future.

Mississauga Windows and Doors LogoGo to Jefnik Homepage for Mississauga Windows and Doors

"From Your Vision To Installation"

Jefnik Windows & Doors
Phone: 416-669-5943
cash, check, credit card, invoice
2583 Kingsberry Cres
Mississauga, ON L5B 2K7