Stack of RELM Finestra 2026 catalogues featuring a modern house facade with large windows and warm interior lighting.

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European Windows. Canadian Expertise.

Premium European windows and doors for builders, architects, and homeowners. Quality, variety, and value—delivered locally.

For Home Builders

Reliable supply and expert support for your next build.

For Architects

Versatile profiles to match your design vision.

For Homeowners

Upgrade your space with modern European style.

For Building Owners

Enhance property value with quality installations.

From Builder To Building Community.

Quality Meets Innovation

Our founder started as a builder and uses his experience to help Canadians elevate their spaces with beautifully-designed and innovative windows and doors.

With years of expertise, we connect Canadian builders and homeowners to premium European windows and doors. Our commitment is to deliver reliable, stylish solutions for every project—on time and within budget.

our Founder

Making Beauty And Performance Simple.

In 2021, Michael Mazzarello launched RELM Builders and began an exciting new chapter in his career as an entrepreneur and independent builder.

Tired of the poor quality-to-price ratio available locally, Michael used his own extensive building experience to open RELM Finestra, bringing truly premium, high-value European windows and doors to the Canadian market.

RELM Builders has won a variety of prestigious awards, including GOHBA, Housing Design Winner 2022, and Arch Daily Nominee 2024.

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Our offering

Versatile Solutions For A Variety Of Projects.

Expect the best performance from our selection. Innovative European designs with technilogy to handle harsh winters and warm summers.

Our Products

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Life Is a Breeze With Quality Windows.

Our curated selection of high-quality windows are designed for durability, energy efficiency, and timeless style. Choose from wood, aluminum, or uPVC profiles to suit any project.

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Enter a New World & Match Your Doors.

Enhance your space with expertly crafted European doors. Our range includes modern and classic options, offering security, performance, and aesthetic appeal for every need.

Take It From Our
‍Happy Clients.

See how we make a difference for builders, architects, and homeowners across Canada.

57+ Years Of Experience.

Our partners collectively have more than 57 years of experience in global markets. We work with renound Eurpoean manufacturers to offer the best options for beauty and comfort.

A Foundation Of Innovation.

Our partners, such as Amberline, are forward thinking and always pshing the boundaries of quality and design. From unusual constructions to classic designs, we work with partners you'll love.

“

Donny Milito

Homeowner

We purchased windows and doors for our home. Tremendous experience from start to finish. Highly recommend RELM Finestra for a seamless. High service and stress-free experience!

“

Lisa Allaire

Homeowner

A+++ experience purchasing new windows and doors for our entire home. The team was knowledgeable and professional. They explained our options clearly and guided us through the entire process. The installation was smooth and efficient. The quality is outstanding — giving us increased heating and cooling efficiency and they look fantastic. Also easy to clean. Highly recommend!!

Elevate Your Space With European Style.

Premium European windows and doors designed for Canadian homes. Explore a wide selection of wood, aluminum, and uPVC profiles—crafted for builders, architects, and homeowners seeking quality and value.

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European Windows. Canadian Expertise.