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Let us answer your questions about replacing your windows to optimize your house’s energy use.

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Your Trusted Local Windows Supplier in Sudbury

It’s common knowledge that the quality and age of your windows, doors and siding directly affect your home’s value and your family’s comfort. Replacing energy-wasting elements with those that keep cold air out and warm air in is not only environmentally sound, but it also saves you money. And it also reduces your environmental footprint. Guardian Windows & Doors, a trusted windows supplier in Sudbury can help you optimize your home. We also serve surrounding areas.


Energy Star-Rated WINDOW and DOORS

In business since 1996, Guardian Windows & Doors specializes in siding, window replacement, supplying and installing Energy Star-rated windows and doors in Sudbury and throughout the Rainbow Country area. Guardian Windows & Doors is proud to offer environmentally friendly Gentek Building Products, as well as free low-E (low-emissivity) glass coatings and argon gas fill to help seal in your window’s insulation for better performance.



Home renovation is a costly, exhausting but exciting task! It is done to achieve various goals, which could be to increase the property value, enhance functionality, give the home a stylish makeover, or add more space. All this can be achieved if you have experienced professionals like us by your side. We are one of the trusted windows suppliers in Sudbury, known for delivering high-quality work. 



Besides keeping a home well-ventilated, windows bring warmth to a place, let natural light in, and improve the aesthetics. You can choose the best type of window for your home based on your requirements, space availability and budget. Following are some types of windows that you may consider adding to your home:

  • Fixed: Fixed windows are non-operational and are added to make a space look bigger, brighter and better. They are energy-efficient and much safer than their operable counterparts.
  • Awning: Awning windows open out and upward from the bottom. The best thing about them is that they keep your home well-ventilated despite bad weather conditions. Awning windows can complement any architectural style and are easy to operate and maintain.
  • Casement: Casement windows are highly energy-efficient and ideal for both big and small spaces. These windows open outward and offer better ventilation than windows with a fixed sash.
  • Single/double hung: Single-hung windows have an operable bottom sash with a fixed top sash. Whereas in double-hung windows, both sashes are operable. They are easy to operate and are best for small rooms.
  • Single/double slider: In a single slider window, one sash is stationary while the other can be moved horizontally. On the other hand, the double slider window offers more flexibility as both sashes in it are operable.


If you replaced your windows and doors and did not call Guardian Windows, you paid too much! We use the “Super Spacer System” that helps reduce sweating on glass. Ask us about the availability of government grants, which varies on a case-by-case basis, and our senior discounts. 


Dependable Suppliers – Contact Us

High-quality windows and doors are just a phone call away! Get in touch with Sudbury’s Guardian Windows & Doors. We’re a local business with over 20 years of experience in serving our area. We’re proud to be trusted by our local community, and we’re happy to provide great service for our outstanding products. Call us today and learn more about how we can help.

House & Cottage

We remove old windows and replace them with energy-efficient models just about anywhere.

More Ways to

Replacing doors, weatherstripping, and aligning thresholds can help you save on energy bills.

Increase Curb

Replace old siding with new vinyl siding that hosts many advantages to other types of siding.

Protect Your Home

Properly installed soffit and fascia can help keep out water and pests such as squirrels, birds and more.








1182 Kantola Rd.

Lively, ON P3Y 1H8


Monday – Friday: 8 AM - 5 PM
Saturday: By appointment only

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