Identify the exact proposed opening.
Tell the supplier which window and pet-door product are involved. A general request for a cat flap does not identify the glazing or compatibility.
Windows · Sedro-Woolley, Washington
Window replacement in Sedro-Woolley considered with a pet door through the glass needs that intention raised before the unit is ordered. Tempered or double-pane glass should not be assumed available for a new hole after manufacture.
Show the window supplier and qualified glazier the intended location and pet-door product. Have them establish a compatible glazing proposal and its effect on the window instead of ordering an ordinary unit with a plan to cut it later.

Window replacement
The pet-door template is only one part of the selection. Ask the responsible suppliers how the opening will be incorporated in the actual glazing and whether the intended window configuration can retain its required operation and performance.
Tell the supplier which window and pet-door product are involved. A general request for a cat flap does not identify the glazing or compatibility.
Ask the qualified glazier or glass manufacturer what must be specified before manufacture. Do not attempt to cut an installed tempered or insulating-glass unit.
Have the installer explain the resulting configuration, operation, written terms and any required safety or opening functions. Keep the approved selection in the order.
Before work begins
Describe the proposed replacement, glazing change and any opening modifications to the City Building Division. Ask which current documents and review apply rather than treating a pet accessory as the complete construction description.
This guide does not select pet-door dimensions, supply a cutting method or establish compatibility for an existing window. Have the actual suppliers assess the proposed unit.
Have the qualified glazier and window supplier arrange the actual glazing proposal before manufacture.
Ask the suppliers to confirm the exact product, glass and operating configuration.
Identify the intended opening, compatible glazing proposal and complete window configuration, including required functions.
Share the affected opening and proposed accessory so the suppliers can assess the actual glazing before ordering.