A draft near a window does not by itself prove that the entire unit needs replacement. Worn seals, poor alignment and conditions around the frame can contribute to air movement. The first step is identifying where the issue appears and how the window operates. That assessment helps separate a focused repair from a larger project.
Tell the installer whether the draft occurs near the sash, frame or surrounding wall. Also describe any sticking, loose hardware or visible gaps. Photos help explain the location, but the source may require an on-site review. An issue in the surrounding building materials can call for different work from ordinary window adjustment or seal service.
Compare proposed options by their scope. A repair may address a specific component, while replacement involves measurements, product selection and installation details. Ask what each option is intended to improve and which conditions remain outside the work. Avoid assuming a precise comfort or energy result before the underlying issue and proposed equipment have been assessed.
770 Doors & Windows can inspect window operation and visible weather-seal concerns. Send photos and explain when the problem is most noticeable. We can discuss the findings and recommend the next step, with the estimate tied to the actual window and surrounding condition rather than a blanket recommendation to replace every unit.