1. The sash will not open, close or lock properly
Sticking, loose hardware or a latch that will not engage can indicate an adjustment or component problem. Do not force the sash. If the window is needed for escape or cannot be secured, arrange prompt attention and have the required opening function checked.
2. A draft persists with the window latched
Inspect torn seals and uneven contact around the moving sash. Air may instead be passing around the fixed frame beneath the trim. Ask the assessor to locate the leakage path before recommending weatherstripping, perimeter air sealing or replacement.
3. Moisture appears within the sealed glass
Fog inside an IGU differs from droplets that wipe from an accessible surface. It may be intermittent, so keep a photograph. A compatible glass unit or sash can sometimes be replaced while retaining a sound surrounding frame; sealed-glass failure does not by itself justify replacing every window.
4. Water or deteriorating material surrounds the opening
Look for recurring stains, soft wood, damaged finishes and water arriving during rain. The entry point can be elsewhere in the wall. Have the water path and concealed damage investigated before covering the area with capping or interior trim.
5. The opening no longer serves the room
An inaccessible handle, inadequate usable opening or a window that cannot meet the roomβs required function can warrant redesign. Confirm the actual clear opening, ventilation and cleaning access of the proposed unit. A different operating style may help, but dimensions and applicable requirements need checking before ordering.
Turn observations into a repair or replacement plan
List the symptom and proposed remedy for each opening. Ask what parts are retained in an insert installation and what is exposed in full-frame work. Separate optional appearance or energy upgrades from repairs needed to restore function.
Request a product and work schedule, written change terms and actual warranty documents. Keep evidence of the original problem and the completed repair. A rise in bills or a generic seasonal inspection pitch alone is not evidence that all windows have reached the end of their service life.
Technical references
- NRCan: Upgrading windows and exterior doors β Window condition, operation, weatherstripping and repair considerations.
- Andersen: Window condensation explained β Sealed-glass moisture differs from indoor or outdoor condensation.
- Pella: Window installation instructions β Insert and full-frame replacement expose different parts of the opening.
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