OPT Windows Ltd

🇨🇦 The first time you slide this door... you'll understand the difference.

Most people expect a large glass door to feel heavy.

Then they try ours.

"Wow... it's so smooth."

That's the difference a premium Lift & Slide Door makes.

At OPT Windows, our heavy-duty sliding doors are engineered for modern Canadian homes, combining luxury aesthetics with outstanding performance.

✨ Why homeowners are making the upgrade:

✔ Premium thermally-broken aluminum frame
✔ Effortless lift & slide operation
✔ Large glass panels for more natural light and stunning views
✔ Superior weather sealing for Canadian winters
✔ Premium German hardware for smooth, quiet operation
✔ Multiple opening configurations available
✔ Optional 304 stainless steel security mesh for fresh air without bugs

Whether you're renovating your backyard, upgrading your patio, or building your dream home, a premium sliding door transforms both the look and feel of your living space.

Because sometimes, the best part isn't how it looks...

It's how it feels every time you open it.

📍 Proudly Made in Ontario
📐 Custom built for your home
👷 Professionally installed by the OPT Windows team

📩 Contact us today for a FREE quote or visit our Markham showroom to experience the difference yourself.

🇨🇦 The moment you install a porch enclosure, you'll wonder why you didn't do it sooner.

It's one of those home upgrades you don't fully appreciate... until you experience a Canadian winter.

No more freezing air rushing into your home.
No more opening the door to rain, snow, or swarms of bugs.
Just a cleaner, safer, and more comfortable entrance—every single day.

✨ Designed for the way Canadians live:

🏡 Adds a bright, functional entry space for shoes, strollers, packages, and everyday convenience

❄️ Helps block cold drafts and improve year-round comfort

🔒 Reinforced multi-point locking system for enhanced security

🌬️ Built-in casement windows let fresh air flow naturally

🦟 304 stainless steel security screens keep insects out while you enjoy the breeze

🪟 Premium thermally-broken aluminum construction, built to perform in Canada's changing seasons

A porch enclosure isn't just about protecting your entrance.

It's about making your home feel more comfortable, more secure, and more complete.

📍 Proudly manufactured in Ontario
📏 Custom-designed for every home
👷 Installed by the experienced OPT Windows team

📩 Contact us today for a FREE quote or visit our Markham showroom.

✨ More Than a Sliding Door. It's a Better Way to Live.

Imagine opening your living room to your backyard with one effortless slide.

Our premium lift & slide doors are designed to transform your home with:

✔ Expansive glass for brighter living spaces
✔ Ultra-smooth, whisper-quiet operation
✔ Premium thermally-broken aluminum frames
✔ Excellent energy efficiency for Canadian weather
✔ Optional stainless steel security mesh for fresh air without bugs
✔ Modern, minimalist design that elevates your home's value

Whether you're renovating your backyard, patio, or building your dream home, this is the upgrade that makes every day feel more luxurious.

🇨🇦 Custom manufactured in Ontario and professionally installed by our in-house team.

📍 Serving Toronto, Markham & the GTA
📩 DM us today for a FREE consultation.

🇨🇦 More Than a Porch. It's an Upgrade to How You Live.

A premium porch enclosure adds more than protection from wind and snow.

✨ A refined, enclosed entrance
🔒 An extra layer of security with a multi-point locking system
❄️ Better comfort by reducing cold drafts
📦 A secure space for packages and everyday storage
🏡 A cleaner, more luxurious look for your home
🛠 Premium thermally-broken aluminum construction built for Canadian weather
🌬 Casement windows with stainless steel security screens for fresh air, ventilation, and bug-free living

Because luxury isn't just about appearance—it's about comfort, security, and thoughtful design.

📩 DM us for a FREE consultation.

📍 Serving Markham, Toronto & the GTA

🇨🇦 More Than a Porch. An Extra Layer of Security for Your Home.

A premium porch enclosure isn't just about blocking wind and snow — it's about creating a safer, more comfortable, and more refined entrance experience.

Our custom aluminum porch enclosures are engineered with a reinforced multi-point locking system, giving your home an additional layer of security while enhancing its appearance and functionality.

✨ Why homeowners are upgrading:

🔒 Reinforced Multi-Point Locking System for enhanced security
🏡 Creates a private, enclosed entry space
❄ Helps reduce cold drafts and improve comfort
📦 A secure area for packages and everyday storage
✨ Elevates curb appeal with a clean, modern appearance
🛠 Premium thermally-broken aluminum construction built for Canadian weather

Whether it's your front entrance, side door, or basement walkout, a professionally designed porch enclosure transforms an ordinary entrance into a secure and welcoming extension of your home.

📍 Manufactured & installed by OPT Windows
📏 Custom designed for your home
🔧 Installed by our own professional team — no subcontractors

Serving Markham, Toronto & the GTA.

📩 DM us today for a free consultation.

📞 +1 (365) 899-0345
📧 [email protected]
📍 103 Denison St, Unit 2, Markham, ON L3R 1B5

🇨🇦 Not Every Home Fits Standard Windows — Why Should Yours?

This GTA project features a fully custom-shaped thermally-broken aluminum window system paired with a premium sliding door, designed to perfectly match the home’s vaulted architecture.

✨ The custom triangular transom window was specially engineered to fit the exact roofline, creating a clean modern look while maximizing natural light.

✔ Custom-shaped windows
✔ Thermally-broken aluminum
✔ Premium sliding door system
✔ Made for Canadian weather
✔ Designed & manufactured to fit your home perfectly

From triangle windows to oversized glass walls, OPT Windows specializes in custom solutions that standard window companies can’t provide.

📩 Message us for a FREE estimate

📞 +1 (365) 899-0345
📧 [email protected]
📍 103 Denison St, Unit 2, Markham, ON L3R 1B5