Percario Proven Products — Top Window Brands

With so many people concerned about their impact on the environment, window replacements have become a huge bed of activity for reducing one’s carbon footprint. The initial cost of a window replacement can save you money in the long run, and help save our planet.

With an ever-increasing amount of technology and information, it’s hard to stay informed as a consumer. We at Joe Percario are dedicated to providing you with up-to-date window knowledge so we can help you choose what is best for your project, and your home.

Percario Proven Window Products are:
State of the Art
High Performance
Superior in Durability & Strength
Exceeding Energy Star requirements
In picture-esque frames

Preservation High-Performance Windows

Preservation High-Performance Windows encompass all of the hallmarks of exceptional window design; unsurpassed quality, functional beauty and maintenance-freedom all in custom styles to masterfully complement your home’s architecture. Preservation Windows are designed to help reduce heating and cooling costs and make your home more comfortable.


Originally from Poland, Voytek Kaniewski and Yarek Ostaniewicz only crossed paths after they came to America, where they became partners as general contractors. Having such success in the window industry, their supplier jested, “If you guys are going to buy so many windows and need them so quickly, why don’t you just start making your own?” While most may have chuckled and not given the idea more than a minute’s thought, they did not. They saw an avenue to create the world’s finest window, which has been their unwavering mission ever since. Though they never cease to improve their products, traveling the world for new technologies & equipment, it would not be premature to say that they have already accomplished their dream when they created the world’s most energy efficient window, the Starmark.

Originally, they only produced one type of window but have since grown to manufacturing welded, single and double hung windows, casement and awning styles, bays and bows as well as patio doors. Since all OKNA products are custom-made, you can be sure of a perfect fit every time.

Okna’s Partners:

Royal Group Technologies is a world leader in advanced PVC processing as well as the largest custom PVC extruder in North America. Okna window profiles and sashes are made of warrantied vinyl that will never crack, warp, corrode or blister.

TruSeal Technologies, Inc. is the largest producer of flexible insulating glass spacers in the world, and started using DuraSeal™, a versatile, flexible spacer system. DuraSeal™ reduces conductivity while improving the appearance of the corners. This spacing system offers superior look and performance over other warm edge spacers.