Identify fixed and moving sections.
Have the provider mark the proposed sash operation and viewing side on the drawing. A three-part elevation does not establish that every section opens.
Windows · Rochester, Washington
Window replacement in Rochester compared with a horizontal slider should identify which sections actually move. A single-slider, double-slider or three-lite end-vent description can change how the household uses an opening even when the outside frame size looks similar.
Ask the supplier to demonstrate the proposed operating configuration and mark it on the order drawing. Keep the fixed sections, movable sash and screen arrangement clear before a broad slider label becomes the final selection.

Window replacement
Compare the actual unit from the room where it will be used. Ask which sash moves, where an opening is created and how the locks and supplied screen work with that configuration.
Have the provider mark the proposed sash operation and viewing side on the drawing. A three-part elevation does not establish that every section opens.
Ask for a demonstration or product-specific explanation of the actual movement and locking. Discuss how the operating sash and screen are reached in the planned room.
Confirm the product, operation and overall size before approval. If the configuration changes, ask the provider to reassess the opening functions and any associated installation work.
Before work begins
Thurston County’s minor-construction resources describe window work involving frame modification. Ask how the selected slider and any altered opening or framing should be presented.
The configuration comparison does not establish emergency-opening, ventilation or other compliance. Have the responsible provider assess the complete installed opening and applicable requirements.
Ask the supplier to mark the fixed and operable sections for the actual unit. The visible divisions alone do not establish operation.
Have the supplier demonstrate the selected product and identify the operating sash. Keep that configuration on the approved drawing.
Have the provider verify the actual opening, room use and applicable requirements. A style label or overall frame dimension does not supply that assessment.
Share the proposed slider drawing and which sections you expect to open from the room.