Minnesota's exclusive quartz collection dealer

 CityLine windows are engineered and built for your unique home featuring Quaker’s® patented OptiCore® Technology. OptiCore® is an architecturally enhanced aluminum frame design that maximizes the thermal, structural and sound performance of each window. Originally engineered for large commercial buildings, OptiCore® Technology offers the most advanced thermal barrier system available for residential applications to maximize energy performance, while allowing for bigger windows and greater views throughout your luxury home. 

 The TimberLine series fuses an architectural aluminum exterior with a classic natural wood interior to provide ageless charm for your living space while permanently protecting your inside from the outside. 

The EdgeLine series highlights a distinct heavy-duty extruded aluminum frame design with super-slim sightlines. The EdgeLine frame features a thermally broken aluminum design that not only provides a high level of energy efficiency, but also meets the strictest building codes and energy requirements.

With EdgeLine, you never have to compromise safety and thermal protection to have an ultramodern design.

 OptiCore® technology features architecturally enhanced aluminum, which combined with an Azo-Core™ thermal barrier reaches some of the lowest emissivity levels (known as U-factor) available in a frame design. The EnergyEnhanced glass package, working together with OptiCore®, creates a comfy interior space even during the coldest weather. All CityLine and TimberLine windows exceed ENERGY STAR requirements in all 50 states. 

 The Quartz Collection™ utilizes a sealant-injected double corner key construction for maximum strength in the corner joinery and frame. This design assures you that every Quartz Collection™ product will provide superior performance while offering a flexibility in configurations to meet your architectural style.