KOH Exterior, Inc.

KOH Exterior, Inc. is a local Window installation service and Window supplier in Chicago, helping homeowners boost energy efficiency, curb appeal, and comfort with properly fitted, high-performance windows. Start by scheduling an on-site assessment for precise measurements, then ask about material options (vinyl, fiberglass, wood) and energy ratings (U-factor, SHGC) to match your goals and budget. Request a written quote that details lead times, included materials (flashing, trim, disposal), labor warranties, and manufacturer coverage, and confirm whether they handle permits and cleanup. To stay on schedule, ask about current availability, installation crew size, and any financing or seasonal promotions before you book.