Record the existing layers.
Show the original glass, any secondary panel and visible ventilation openings in the survey. Note observed condensation without assuming its source or sealing openings as a remedy.
Windows · Chehalis, Washington
Window replacement in Chehalis may involve ordinary room windows alongside a stained-glass feature that the owner wants to keep. Adding a clear protective layer over that feature creates a space whose heat and moisture behavior needs specialist attention.
Identify the retained decorative panel separately on the window schedule. Photograph its interior and exterior, including any existing protective glazing, and arrange a conservation assessment before specifying another layer.

Window replacement
The protection decision should address the condition of the decorative panel and the behavior of the added enclosure. Ask the specialist whether protection is appropriate, how the intervening space will be ventilated and how future inspection can occur.
Show the original glass, any secondary panel and visible ventilation openings in the survey. Note observed condensation without assuming its source or sealing openings as a remedy.
Ask who evaluates heat and moisture in the space between layers and specifies any ventilation. A clear outer pane is not a complete conservation design.
Mark the specialty feature separately from standard window replacements in the proposal. Identify who handles its assessment, protection during nearby work and later maintenance access.
Before work begins
Chehalis historic review considers features contributing to a local designation, including listed interior features. Ask staff how a retained stained-glass panel and any new outer glazing fit the actual property record.
Confirm specialist responsibilities before including conservation work in a replacement contract. Retaining decorative glass does not settle the other opening, glazing or room-use requirements.
Have a conservation specialist assess the panel and proposed enclosure. Protection can introduce heat and moisture problems when the space between layers is not properly considered.
Do not assume they are accidental gaps. Have the specialist identify their purpose and the existing ventilation arrangement first.
List it separately and confirm the provider, assessment and scope. A standard unit allowance does not describe stained-glass conservation.
Identify the retained decorative panel separately on the window schedule. Photograph its interior and exterior, including any existing protective glazing, and arrange a conservation assessment before specifying another layer.