Extra Quality | Optimum Windows And Doors Northbrook

Susan chose —double-hung with foam-filled frames and a composite reinforcement that prevents warping. For her patio door, she selected a Soft-Lite sliding glass door with a fiberglass-reinforced sill, designed to withstand Northbrook’s freeze-thaw cycles.

By appointment only, with virtual and in-home consultations. Specializing in high-efficiency, triple-pane, and custom-fit solutions for North Shore homes. optimum windows and doors northbrook

Optimum specializes in from premium manufacturers like Soft-Lite, Sunrise, and Provia. For Northbrook’s climate—humid summers, brutal winters, and dramatic temperature swings—these windows offer a U-factor below 0.22 (standard double-pane is around 0.30). Lower U-factor means less heat escapes. For Susan, that translated to an estimated 25% reduction in her heating bill. The Optimum Process: Precision Over Pressure Unlike high-pressure sales outfits, Optimum’s approach is consultative. In Northbrook, where homes range from 1960s colonials to new-construction moderns, each project requires custom measurements. Optimum’s team uses digital laser tools to measure to the 1/16th of an inch. Susan chose —double-hung with foam-filled frames and a

When Optimum’s lead installer, Mike Cerone, ran the test on Susan’s house, the results were sobering: her home’s air changes per hour (ACH) was 0.85—far above the recommended 0.35 for energy efficiency. “You’re heating the outdoors,” Mike told her. “But we can fix that.” Lower U-factor means less heat escapes

“I thought all windows were the same,” Susan admits. “I almost bought from a big-box store. But then my neighbor, a retired architect, said: ‘Don’t buy a window. Invest in an assembly —frame, glass, gas fill, and installation. Go see Optimum in Northbrook.’”

Susan’s story begins like that of many Northbrook homeowners. Her house, a charming but aging split-level built in 1978, had original single-pane aluminum windows. In summer, the AC ran endlessly. In winter, she could feel cold air rolling off the glass like a waterfall. Worse, the master bedroom’s sliding patio door had become so stubborn that she needed both hands and a hip-check to open it.