Window Replacement: Decide What the Project Must Solve

Diagnose the reason for replacement

Before selecting a product, record which windows stick, leak, fog, or feel drafty and under what conditions. Drafts can come from the window, gaps at the trim, or pressure and ventilation conditions elsewhere in the house, so ask the contractor to explain the diagnosis.

Discuss whether a repair, sash replacement, or full-frame replacement is appropriate. The method affects the amount of trim and finish work, opening dimensions, and the ability to inspect concealed framing.

Specify the product and installation

A useful proposal lists window style, frame material, glazing configuration, operating direction, dimensions, and any applicable product performance label. Ask how the proposed ratings fit the climate and exposure of the home rather than comparing a single number in isolation.

Clarify flashing and water-management details, insulation around the frame, interior and exterior trim, disposal, repair of concealed damage, and protection of furnishings. Identify which work is included and how concealed rot or other surprises will be priced and approved.

• Ask for a room-by-room or opening-by-opening schedule.
• Confirm who obtains permits if the local jurisdiction requires them.

Compare proposals without guessing at price

ENERGY STAR explains its certified window program; use the exact product identifiers to compare like-for-like options. Product certification does not guarantee that installation details, water management, or finish repair are included in a bid.

Current local prices are unavailable here. Ask multiple contractors to bid on the same openings, replacement method, finish expectations, and disposal. Compare warranties, exclusions, schedule, and the written process for approving additional work.