Illinois Energy Windows & Siding, Inc.

Illinois Energy Windows & Siding operates from Lisle and serves DuPage County homeowners seeking window and siding replacements that improve energy efficiency and exterior appearance. With a 4.6-star rating across 698 verified Google reviews, the contractor has built its reputation on meticulous installation standards that exceed code requirements and responsive service throughout the remodeling process. The company maintains weekday hours until 8 PM on Tuesdays through Thursdays, accommodating working households who cannot take time off for consultations.

What distinguishes this contractor is their experience with older housing stock across northeastern Illinois, particularly homes built before 1970 where original windows have lost their seal or functionality. Unlike new-construction specialists, their crews understand how to flash retrofit openings, insulate historic weight pockets, and preserve interior trim while achieving a weathertight seal. Their name reflects a focus on energy-efficient products that reduce heating costs during Illinois winters, a practical concern for homeowners facing utility bills in a four-season climate.

Customers describe specific outcomes that validate the companys claims. Donovon Simpson hired them to replace north-facing windows in his 1938-vintage Lisle home and noted the crew used proper flashing tape on sills, multi-pass foam in rough openings, and filled old wood-frame weight pockets with insulation, techniques that eliminated cold drafts he had lived with for years. Ariel Sprouse reported measurable heat retention after her installation and praised the crews courteous cleanup. Fred LeBaron highlighted the in-home consultation where salespeople walked him through options without pressure, a process he described as relaxed and thorough.