Welcome to Frank

Explore our range of innovative and stylish windows and doors, proudly made in Ontario, crafted with precision, and built to last.

Learn about the Rebrand

Frank by Ostaco

Product Categories

Windows

Maximize your living space

When you choose windows from Frank, you get access to endless customization and industry-leading performance. With four distinct product lines and limitless options, Frank is your window solution for a replacement, renovation, or new construction.

Entry Doors

Explore our Collection of Premium Entry Doors

With our smooth fiberglass doors, choose from a range of meticulously crafted designs, blending style with durability. Experience peace of mind and make a lasting impression with our secure entry doors.

Sliding Doors

Seamless Indoor-Outdoor Integration: Make a statement with silent strength

Discover the perfect blend of functionality and modern elegance. Our sleek sliding doors effortlessly connect or separate rooms, adding a touch of sophistication to any environment. Experience seamless transitions and create an inviting atmosphere with our premium solutions.

Imagine with Frank™

Deciding on the product that’s right for your project is just the beginning. With an extensive array of design options to choose from, you can customize your windows and doors to reflect your home’s architecture, character, and personality.

Energy Efficiency

Rated Most efficient by Energy Star

Our innovative window design includes a sealed argon gas layer and warm edge spacers to add insulation, making your home more energy efficient and saving you money on monthly utilities.