Vinyl Windows Tailored for Each Projects
Durable, energy-efficient, and virtually maintenance-free, our vinyl windows deliver dependable performance and lasting value for renovations and new construction alike.
Core collection
Achieve the ideal combination of style and functionality with our purpose-built window, expertly crafted to seamlessly integrate into your renovation plans.
Ideal for Renovations
3 ¼” Vinyl Frame
Casements Available in Dual & Triple Glazed
Hungs & Sliders Dual Glazed Only
Most Cost Effective
Energy Star Rated
Core+ collection
Designed to meet your essential needs without compromising on quality, these windows offer exceptional functionality and lasting value.
Most Versatile Window
4 9/16” Vinyl Frame
The Deeper Frame Allows for Recessed Glass & Better Energy Efficiency
Classic Wood Window Design Meets Modern Engineering
Casements Available in Dual & Triple Glazed
Hungs & Sliders Dual Glazed Only
Prism collection
Elevate your space with our contemporary, high-end windows featuring 18% more glass exposure. Experience a seamless connection to the outdoors, abundant natural light, and modern design.
More Glass Surface Area, with a Low Profile Design
4 9/16” Vinyl Frame
Contemporary Hardware
Engineered for Larger Openings
Clean Slim Lines & Hard Edges for a Modern Look
Available with Double or True Triple Panes
Enersense collection
Crafted with a blend of wood and vinyl, it combines the timeless charm of wood on the interior with the low-maintenance, weather-resistant qualities of vinyl on the exterior.
Interior Available in Cherry, Oak, Pine, & Cellular PVC
Low sound transmission - STC rating of 36-39
Available with True Triple Panes & 1 3/8” Glazing
Built-in 1 3/16” nosing
Thicker Exterior Sash Walls (.090” Versus .068”)
Rated Most Efficient by Energy Star
Tango collection
Combining a sleek design, high level of security, and versatile operating features. Tilt it for ventilation, turn it for cleaning, or sit back and enjoy the view.
Ideal for Renovations
4 ½" Vinyl Frame
Tilt-in Feature for Ventilation
Dual 1” & Triple 1 3/8”
Safety key lock available
Energy Star Rated
Frank by Ostaco is a family owned company with over 35 years of experience, delivering quality products and exceptional service. Guided by continuous innovation and feedback from its dealer network across Canada, Frank remains committed to lasting performance and craftsmanship.
Vinyl windows Installed
See our vinyl windows at work in homes across the GTA and Muskoka. Every installation reflects the durability, energy efficiency, and clean finish that make vinyl a dependable choice for any project.
View Projects
Frequently Asked Questions
Yes. Vinyl frames are excellent insulators and won't warp, rot, or corrode, making them a dependable, energy-efficient choice for our climate — with very little upkeep.
Very little. Vinyl never needs painting or staining; an occasional wipe-down is all it takes to keep them looking new.
We offer a wide range of frame colours, grille patterns, and operating styles — casement, awning, hung, slider, and more — so your windows suit any home.
They are. Insulated frames paired with high-performance glass help reduce heat loss and lower energy costs, and many configurations are ENERGY STAR-certified.
More Window Options
Let’s Start Your Project
Whether you’re planning a new build, renovation, or replacement, our team is here to support your project with expert guidance & tailored solutions.
Phone: 905.660.0271 | Email: [email protected]
Speak with Our Team