2651 John Street, Unit 2 Markham, ON, L3R2W5


Custom Windows in Mississauga

With over 30 years of experience serving our community, Torwin’s full range of products and attention to detail allows us to provide top-rated window installation services and quality replacement windows for homeowners in Toronto and the GTA.


Whether you’re looking to replace your exterior windows, install new bay windows, or brighten up a sunroom, we have top-quality windows to fit every need and installation features to fit every taste. Choose ready-made or custom window installation options.

No matter what your window needs are, Torwin Windows & Doors has it covered. After decades in this business, we have the reputation of being a trusted window supplier and installation service for homes across the GTA. We offer a comprehensive range of window types and styles available to enhance the beauty and increase the value of your home.

Bow Windows

Bow windows extend beyond your home’s outer wall in a graceful arch. These windows, often constructed with durable and efficient vinyl, can create the feel of more space in small or dim rooms. And unlike standard windows, which can limit the light coming into your home, bow windows take in light from all angles, giving your home a bright and airy feel!

Bay Windows

Bay windows bring in extra light and add seating space with three or more angled windows. When you decide on these classic vinyl windows, you not only get a beautiful, secure, and energy-efficient product, you also get the added advantage of maintenance-free operation. Bay windows offer a range of options, including double-hung, casement, picture windows, and more!

Casement & Awning

Both casement and awning windows feature hardware that allows them to open outward, providing tons of ventilation & natural light. This makes casement or awning windows ideal for adding personality to any room, especially harder-to-reach areas, like over sinks, counters, and closets.

Our vinyl awning and casement windows offer the perfect combination of style and simplicity. You get simple, elegant windows without the headache of sticky or difficult operating mechanisms.

Hung Windows

Hung windows offer high energy efficiency, superior ventilation, and are simple to maintain.

One of the advantages of our hung windows is that they can open to expose more than half their area for ventilation. Talk about letting the breeze in! What’s more, our hung windows feature a sloped sill and several layers of weather stripping to maintain energy efficiency. Another unique feature of our hung windows is that they tilt inwards making them easy to clean.


Sliding windows are low maintenance, durable, and incredibly easy to use. Another advantage sliding windows provide is incredible durability and strength. Much like our hung windows, our slider windows also tilt inwards making them easy to clean. This strength is thanks to properly welded corners, which add to that smooth and sleek design.

All our sliding windows are manufactured with high-quality materials and strict adherence to quality control, to provide the most energy-efficient windows possible.


Greenhouse windows aren’t only great for indoor gardening – they also improve ventilation and enhance your view! Our greenhouse windows are designed to keep out the winter cold with fusion-welded frames and highly efficient weather stripping, double-glazing, and an insulated base. During a heatwave, simply open the top venting windows to let in a cooling breeze.

Bow windows
Create space beyond your exterior wall with an elegant curve.
Bay windows
Also create the illusion of space with 3-sided, angled windows.
Casement & Awning Windows
Offer the best ventilation and loads of natural light.
Hung windows
Either single or double, can help make your home more energy-efficient.
Provide tons of natural light, perfect for rooms facing walkways, porches, etc.
New greenhouse windows provide light for your indoor mini garden.

Frequently Asked Questions 

How do I know if I need to replace my windows?

If you see cracking, damage or seal failures forming in or on your windows, it’s a good sign that they need to be replaced. But you can benefit from window replacement even if there are no apparent issues with your current windows. Your windows could still use an upgrade, particularly if you live in an older home.

Energy efficiency, styles and window technology have all come a long way in the last several years. Updated windows can help you save on your energy costs while giving your home a facelift and upping your property value.


What should I look for in a quality window?

Good quality windows can be made from various materials, like vinyl, PVC, aluminum or a combination of the three. Look for solid frames and replaceable components – that way, if one part of your window is damaged, you may be able to repair it without having to source and install an entirely new window. Quality windows will also have durable, smooth operating hardware and locking mechanisms, making them a pleasure to use. Contact us for an appointment to visit our showroom, where you can test out the windows you have in mind before you decide.


What should a good window installation service cover?

We consider ourselves one of the best window installers in the GTA, and our service backs this up! From our very first meeting with you, we aim to meet your preferences and requests to exceed your expectations. To prevent surprises, we take down all required measurements ourselves on-site and make recommendations based on your needs and style.

Once you’ve made a decision, we’ll take care of the rest, making sure the windows are ordered and delivered according to schedule and sending our expert installers in to make quick work of the whole process.


What is involved with custom window installation?

Any custom project at Torwin starts with a consultation process, so we get a better idea of what the client is looking for, their tastes and budget. Depending on the work involved, we may send one of our pros on-site to do an assessment and take the necessary measurements before we provide you with a proposal. Once you provide us with approval, we’ll manage the entire process, from ordering to construction, delivery and installation. Get in touch to see some of the previous custom window installations we’ve been a part of.


How do I know which windows will suit my home?

It’s up to you! Ultimately, the perfect windows for your home are the ones you love. If you need a bit more guidance, one of our Torwin team members would be happy to guide you through the decision-making process. We have an eye for style and knowledge of home decor trends. With over 30 years of experience in designing and installing windows, we can help you pick windows that will give your house the elevated, cohesive look you have in mind.