Premium Quality Materials for a Lifetime of Hassle-Free Performance
Not all vinyl windows are created equal.  Low grade PVC can bend, bow and discolor.  That's why Hanke Brothers Premium Windows are made using the finest quality, specially blended, un-plasticized poly vinyl chloride, or uPVC, frames and sash. This New Generation vinyl withstands harsh weather and wear-and-tear better. Your window frame and sash material will never rot like wood windows are prone to do; it will never corrode like metal windows. Consistent color throughout resists the appearance of scratching and look like new for years to come.

Superior Manufacturing Methods Ensure Superior Strength
Many vinyl windows today are screwed or stapled at the corners just like wood or metal windows. Some are welded on very old, single or doubleweld machines. The corners can separate and leak air and water. Hanke Brothers premium sashes and frames are fusion welded with robotic 4-point welding equipment that permanently fuses all four sides together into a single weather-tight unit, guaranteed to stay strong and square for the life of the window.

Insulated Glass Packages
Our technologically-advanced, robotically manufactured insulated glass packages offer a choice of insulating performance which can be tailored to your geographic location. The finest in multiple layered glass and argon or krypton insulating gas, along with super energy efficient “warm edge” sealing technology, assure maximum energy savings and resistance to condensation.

UltraSmart™ Weatherstripping

Ultrafab® Tri-Fin® Gold Series weatherstripping with built-in Ultra-Fresh® antimicrobial protection minimizes drafts, dust, and pollen and fights the growth of mold on the weatherstripping material. 600 inches of UltraSmart™ weatherstripping is used in an average sized double hung window.

Composite Sash Rail Reinforced With Kevlar®

The sash keeper rail in our double hung and slider windows are reinforced with a unique resin-based glassfilled composite material. K-Beam™ utilizes Kevlar® fibers for additional strength and the lowest thermal conductivity meaning extra energy efficiency. Most manufacturers of vinyl windows today use aluminum or steel to reinforce their vinyl, which works like a thermal short circuit due to the poor thermal properties of the metal. K-Beam™, our advanced composite reinforcement with Kevlar®, assures maximum strength, energy efficiency and durability for the life of your home.

Endura-Force™ Balance System
When you choose a double hung window configuration there are additional features to look for. A sash can be moved up and down for ventilation purposes. Insulated glass is heavy, especially if you are using the higher insulating and more energy efficient triple pane glass combinations of today. Balance hardware is used to help offset the sash weight so that a homeowner can operate their window with ease.

There are several balance types in use today. It’s important to know the differences because they can make a big impact on how smoothly your windows operate over time. Hanke Brothers Prmium Windows use a new, heavy-duty, constant-force balance. Our balance is a Teflon®-coated, stainless steel coil protected inside a thermal housing which makes it strong, silent and thermally superior.

With a 3/4” inch steel band width and a fully encapsulated thermal chassis that resists dirt and dust accumulation, our Endura-Force™ balance system will give you decades of effortless, maintenance-free operation. Spiral balancers are a thing of the past. Block and tackle balancers depend on a string, a spring, and pulleys that are housed in a metal chassis that does not help the thermal performance of
the window they are in. These are among the reasons that the Endura-Force™ system is a standard part of every Hanke Brothers Imperial LS double hung window.