Made in Canada

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Made in Canada

4.7/5 HomeStars Rating

300K+ Happy Customers

45+ Years in Business

Non-Prorated Lifetime Warranty

ENERGY STAR Certified Products

Adam Kwasnicki

Our local representative has been serving Carlisle and surrounding areas for over 15 years!

1-844-738-7936

Our Local Clera Branch Serves Milton

As the manufacturers and installers of all our windows and doors, we stand behind our work.

Plus Get $600 per Window in Free Upgrades

With our wide range of ENERGY STAR products, you can be sure to save big on your next dream project!

Instant FREE Upgrade to Brilliance Line

Don’t pay for 18 months from Installation Date

Low Monthly Payments Available

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Hung Window, Gallery Image - Clera Windows + Doors

Single & Double Hung Windows

Easy-clean tilt function – Easily clean exterior glass from inside your home
Space-saving design – Perfect for narrower lots and condo spaces‍
Ultimate ventilation control – Adjust top, bottom, or both sashes to direct airflow

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Awning Windows

Superior weather seals – Triple-sealing system creates airtight weather barrier
Rain-or-shine ventilation – Top-hinged and opens outward to let air in, not water‍
Break-in resistant – Harder to force open thanks to secure multi-point locking

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End Vent Slider Windows

Unobstructed city views – Slim frames and large glass panels maximize glass area
Dual sliding sashes – Enjoy fresh air from both ends of the window‍
Effortless operation – Smooth rollers allow for seamless opening and closing

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Double & Single Slider Windows

Horizontal sliding – No swing-out clearance needed
Lift out sashes – Easily lift out panels for quick, hassle-free cleaning‍
Sleek design – Clean lines and a minimalist frame for a modern look

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Speciality Shaped Window, Gallery Image - Clera Windows + Doors

Specialty Windows

Custom shapes & sizes – Match door and window style to your home’s aesthetic
Light without limits – Brighten hard-to-fit spaces with precision-crafted glass‍
Energy-efficient materials – Tailor-made for insulation and UV protection

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Bay & Bow Windows

Dramatic visual impact – Create depth and dimension to any space
Extended interior space – Add a cozy nook or built-in bench
Panoramic light & views – Let the outside in with multi-panel layout

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Fixed or Picture Windows

Maintenance-free – No moving parts means no fuss, no wear
Zero energy leaks – Keep drafts and energy bills down‍
Frameless views – Large glass area for scenic backdrops and natural light

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Casement Windows

Maximum airflow – Hinged on the side and opens outward for full ventilation
Tight-locking design – Multi-point locking system keeps out drafts and intruders‍
Sleek crank handle – Easy to open in kitchens or behind furniture

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Steel Entry Doors

Reinforced steel construction – Built for strength, durability, and top-tier protection
Smooth, low-maintenance finish – Resists rust, dents, and wear
‍Energy smart – Foam-insulated core helps keep your heating bill in check

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Designing Your Fiberglass Door - Clera Windows And Doors

Fiberglass Doors

Environmentally friendly – Get the look of wood without harming the environment
Built for Canadian weather – Stands up to moisture, dents, and daily wear ‍
Superior insulation – Keep your home cozy no matter the weather

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Sliding Patio Doors & Garden Doors

Unlock natural light – Expansive glass panels brighten your space beautifully
Smooth-gliding operation – Glides open with ease and locks up tight‍
Extend your indoor living outside – Effortlessly blend your home with your patio or garden

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Storm Doors

Enhanced weather protection – Shield your entryway from rain, snow, and wind
Customization – Available in clear, ventilated, and decorative glass options‍
Secure ventilation – Keep insects out and fresh air in

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Hear What Clera
Customers Have to Say

With some of the highest ratings for customer satisfaction, it's clear why Clera is Ontario's most awarded window company!

9.2/10

on HomeStars

16x Homestars Winner

“I have nothing but good things to say about the services I have received from Clera. About 4 years ago I purchased a new front door from Clera. The salesperson was knowledgeable and understood what I was looking for...

Tammy Yazbeck

Muskoka

"Excellent! We have loved our dealings with Clera. Rod was amazing in listening and understanding the look we were trying to achieve and then suggesting products with the appropriate features...

Eric Tang

Ottawa

“We have received so many compliments on our doors. Mike and his crew (Mike and Anthony) are very friendly and professional...

Maria Novielli

Ontario

"We changed practically all the windows of our home and a sliding door and can't be more happy with the result.."

Roxalía Muñoz

Concord

"Both our sales rep, Greg, and installation team were courteous, skilled and acted professionally during the whole process. Will use Clera again for any future projects..."

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Frequently Asked Questions

The Best Custom Windows & Doors in Milton

Name: Windows and Doors
Brand: Clera Windows + Doors
Rating: 4.6 (652 reviews)

Call Us

The Best Custom Windows & Doors in Milton

Adam Kwasnicki

Our local representative has been serving Carlisle and surrounding areas for over 15 years!

1-844-738-7936

Our Local Clera Branch Serves Milton

As the manufacturers and installers of all our windows and doors, we stand behind our work.

Adam Kwasnicki

Our local representative has been serving Carlisle and surrounding areas for over 15 years!

1-844-738-7936

Our Local Clera Branch Serves Milton

As the manufacturers and installers of all our windows and doors, we stand behind our work.

Clera Windows + Doors

Toll Free: 1-905-738-1870
Phone: 1-905-738-1870
Fax: 905-738-0586

Sales: sales@clerawindows.com
Service: service@clerawindows.com

Get a Quote

Best Windows And Doors - Clera Windows + Doors

Replacement Windows and Doors Milton

Steeped in history and brimming with charm, Milton, Ontario, offers residents a unique blend of urban convenience and small-town character. Whether you're strolling through the vibrant downtown, exploring the rich heritage sites, or enjoying the natural beauty of Crawford Lake, Milton provides a wonderful place to call home.

Clera Windows + Doors understands that your Milton residence deserves fenestration that reflects its unique charm and contribute to its long-term value. For over 45 years, we have been the trusted choice for homeowners throughout Ontario. We specialize in crafting beautiful, energy-efficient windows and doors Milton residents need to complement the architectural styles.

Our commitment to quality extends beyond aesthetics. We prioritize energy efficiency and long-lasting performance, ensuring your Milton home remains comfortable and stylish while minimizing your environmental impact—a perfect fit for the eco-conscious Milton resident.

About Clera Windows + Doors

Milton residents take pride in their homes, and for good reason. The town's historic charm and modern living create a unique atmosphere. We understand the importance of the door and window replacement Milton residents need to enhance their home's beauty but also contribute to its comfort.

We've built a strong reputation serving Milton residents with a wide variety of beautiful, energy-efficient windows and doors. Whether your taste leans towards classic elegance or a modern statement piece, Clera can provide all the custom windows and doors Milton residents want.

Investing in Clera Windows + Doors goes beyond your home. By choosing ENERGY STAR-certified products, you'll not only save money on your energy bills but also minimize your environmental impact—a perfect fit for the eco-conscious Milton resident.

Customized Windows & Doors In Alliston - Clera Windows + Doors

Invest In Your Home Today - Clera Windows + Doors

Why Choose Clera

Why take a chance with other window or door companies that purchase their products from another supplier, only to resell them to you for a higher cost?

Clera Windows + Doors is one of Canada’s largest, oldest, most dependable and reputable vinyl window manufacturers in Ontario. We fully manage and take care of your door and window replacement project from start to finish, ensuring every stage of your window or door project meets our lofty standards of craftsmanship.

Why are we Ontario’s most awarded window and door company?

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Learn More

Over 45 Years of Experience

With over 45 years of experience, we have earned a reputation as one of Canada's leading window and door manufacturers and installers.

Certified Technicians

You can trust our team of factory trained technicians to install your new windows perfectly—our A+ BBB rating is no accident!

Serving Ontario With over 40 Branches

We have over 40 branches across Ontario, which means that we're always close by when you need us.

Non-prorated Lifetime Warranty

Whenever anything goes wrong with your windows, we'll take care of it for you—no questions asked.

ENERGY STAR® Certified

Our hung windows meet Canada's strict energy-efficiency standards. A window from Clera is not only high-quality and durable, but also energy-efficient.

Reasons to Love
our Products

Clera Windows + Doors is a reputable vinyl window manufacturer in Ontario with a history of dependable and high-quality products. Our superior materials and cutting-edge technology ensure durability, energy efficiency, and style. We offer customizable styles and colors, as well as superior security features and noise reduction technology to provide the best possible product attributes for your home.
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Our team manages every stage of your replacement project, from start to finish. We work closely with you to understand your specific needs and preferences, and use our extensive experience and knowledge to deliver a solution that exceeds your expectations. Trust Clera Windows + Doors for exceptional service and expertise for your home renovation needs.

Energy Star Approved

Modern, Contemporary Design with more glass, and less frame

Better home security

A quieter home; improved noise reduction from the outdoors

No maintenance: vinyl windows are virtually maintenance-free

Pilkington Low-E Glass Technology, engineered specifically for Canadian climates

Wet-glazed frames and sashes on all windows; the ultimate in protection against water and wind infiltration, with added structural integrity

Triple-fin weatherstripping with built-in anti-microbial properties, meaning no mould and better air quality

100% pure virgin UPVC, providing protection from fading

Stronger hardware and structural integrity thanks to integrating galvanized steel (allows for larger, more spectacular views!)

Hear What Clera
Customers Have to Say

With some of the highest ratings for customer satisfaction, it's clear why Clera is Ontario's most awarded window company!

9.2/10

on HomeStars

16x Homestars Winner

Tammy Yazbeck

Muskoka

"Excellent! We have loved our dealings with Clera. Rod was amazing in listening and understanding the look we were trying to achieve and then suggesting products with the appropriate features...

Eric Tang

Ottawa

“We have received so many compliments on our doors. Mike and his crew (Mike and Anthony) are very friendly and professional...

Maria Novielli

Ontario

"We changed practically all the windows of our home and a sliding door and can't be more happy with the result.."

Roxalía Muñoz

Concord

"Both our sales rep, Greg, and installation team were courteous, skilled and acted professionally during the whole process. Will use Clera again for any future projects..."

Greg Buczynski

Concord

Milton’s Leading Replacement Windows and Doors

Our team comprises Milton residents who possess a deep understanding of the town's architectural landscape. Whether your home reflects a classic Victorian charm or a modern minimalist aesthetic, Clera has the perfect windows and doors to complement its style.

We don't offer a one-size-fits-all approach. Our extensive selection allows for customization, ensuring your windows and doors seamlessly integrate with the character of your Milton home.

Clera prioritizes exceptional quality in every window and door we create. Using durable materials and meticulous craftsmanship, we ensure lasting beauty and superior weatherproofing for your Milton home. Our windows and doors are built to withstand the elements and deliver long-lasting performance, keeping your home comfortable and secure for years.

Window & Door Assemblers - Clera Windows + Doors

Best Vinyl‍ End Vent Slider Windows - Clera Windows + Doors

Vinyl Windows Milton Residents Trust

Milton's architectural charm deserves windows that celebrate it. Clera Windows + Doors offers a diverse selection, from timeless bay windows for Victorian homes to modern awning windows and expansive fixed casement windows that maximize natural light.

All Clera windows are meticulously crafted for superior energy efficiency, keeping your Milton home comfortable, stylish, and eco-friendly. Let our Milton-based experts guide you in selecting the perfect windows to frame the beauty of your home and connect you to the unique character of Milton. We offer the window installation Milton residents trust to keep their homes safe and secure.

Vinyl Replacement Doors Milton

Clera Windows + Doors offers a comprehensive range of exterior doors designed to enhance the security, functionality, and curb appeal of your Milton home. Whether your residence needs fibreglass doors or sliding entry doors, our team can help you find the perfect solution.

Our exterior doors are meticulously crafted for long-lasting performance and energy efficiency, ensuring your Milton home remains comfortable and stylish while minimizing your environmental impact.