Start With the Window Problem
A draft, hard-to-open sash, torn screen and rotten sill are all window-related problems, but they belong to different repair paths.
Identify the symptom before making a replacement decision. The goal is to solve the failing component without automatically assuming the entire window unit needs to come out.
Repair, Frame Work or Full Replacement?
General Window Repair handles operation and hardware. Window Frame Repair focuses on sill and perimeter deterioration. Weatherproofing addresses appropriate sealing issues.
Window Installation & Replacement becomes the right page when the entire unit or opening needs to change. Keeping those paths separate makes the larger replacement decision more meaningful.
One Window or a Larger Project?
A single failed unit can be addressed independently. Several similar windows with the same age or condition may justify planning them as a group.
The final scope should come from the actual openings and homeowner goals rather than a blanket assumption that every window on the house should be replaced at once.