Portland window work starts with the opening, not a product demonstration. Determine whether the sash, insulated glass, frame, sill or wall flashing has failed; then compare repair, insert and full-frame scopes. Portland states that same-size replacement without a header change or reduced clear opening generally does not require a building permit, while new or widened openings do. Safety glazing, egress, zoning or historic review may still affect the address. Require a written opening-by-opening schedule and verify the Oregon contractor.
List every opening, observed condition, repair or replacement method, frame material, glass and safety requirements, flashing, air and water sealing, trim restoration, permit responsibility, protection and warranty. Confirm whether each opening is same-size, widened or in a regulated location before ordering.
Fog between panes points to a failed insulated-glass seal; water at trim may enter from flashing or cladding; hard operation can involve sash, hardware or a distorted frame. Ask for opening-by-opening findings. Replacing the entire unit without locating water entry may preserve the same wall leak, while replacing glass alone will not correct a rotten sill.
An insert retains the old frame and reduces disturbance, but it also depends on that frame being dry, stable, square and correctly integrated with the wall. Require sill and frame inspection plus a plan for air and water sealing. Full-frame work exposes the rough opening and flashing, which can be more appropriate where leakage, rot or earlier installation problems exist.
The proposal should describe sill support, pan or membrane, jamb and head integration, drainage path, exterior sealant and interior air sealing. A bead of caulk is maintenance, not a complete flashing strategy. Ask how siding, stucco or trim is removed and restored and what happens if concealed damage is discovered.
Portland lists several hazardous locations that require tested safety glass, including certain windows near doors, tubs, showers, stairs and walking surfaces. Bedrooms and altered openings may also involve emergency-escape requirements. Have the installer identify regulated locations before products are ordered. Same-size replacement does not waive applicable safety-glass rules.
Portland says a same-size replacement with no header-location change and no reduction in clear opening generally does not require a building permit. Adding, widening or otherwise altering an opening does. Historic or design-zone review may still apply. Confirm the property and scope rather than using a blanket claim that all replacements are permitted or exempt.
Comfort goals can include surface temperature, solar heat, glare, fading, condensation resistance or noise. Ask for whole-unit performance and the coating or glass package by orientation rather than only center-of-glass claims. For noise, air sealing and glass construction both matter. Product choice should follow the room's problem and the retained frame condition.
Match the legal business and CCB number through Oregon's license tools. Separate product warranty from installation workmanship coverage, and record who handles a leak, glass failure or operating problem. If structural alteration or other trades are subcontracted, identify those businesses and responsibilities in writing.
Operate locks and sashes, inspect trim and sealant, check drainage paths, remove labels and debris, and review any photographs of concealed repair. Obtain the opening schedule, product records, warranty registration and permit or inspection evidence where applicable. Keep matching finish information for later maintenance.
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Portland says no building permit is generally required when header size and location stay unchanged and clear opening is not reduced.
Adding or widening a window changes the permit path and may require structural, egress, exterior and zoning review.
Portland lists hazardous locations where replacement glazing must be tested and labeled safety glass even when the opening size is unchanged.
| Path | Useful when | Main evidence |
|---|---|---|
| Sash or hardware repair | Frame and sill remain sound | Operation, air leakage and component condition |
| Glass-unit replacement | Frame is sound but sealed glass failed | Measured unit and glazing compatibility |
| Insert window | Existing frame is dry, square and serviceable | Sill and frame inspection |
| Full-frame replacement | Rot, leakage or opening correction requires access | Rough-opening and flashing plan |
| Opening alteration | Size or location changes | Permit, structure, egress and exterior details |
Separate repair, product, demolition, flashing, trim, painting, access, structural work, permits and disposal for each opening. Full-frame work and concealed rot can change labor substantially. Require an allowance or unit rate with evidence for hidden repair rather than relying on a generic Portland per-window range.
Generally no when header size and location stay unchanged and clear opening is not reduced, according to Portland's guidance. Other review can still apply.
Adding a new window, widening an opening or changing structural conditions requires review; confirm zoning or historic requirements for the address.
An insert retains the old frame. Full-frame work removes it to expose the rough opening and flashing.
Often, when the frame is sound and a compatible insulated-glass unit can be installed. Diagnose the whole opening first.
Portland lists hazardous locations near doors, bathing areas, stairs and low large panes. The installer should classify each opening.
Use a written allowance or unit rate, require photographs and approve the repair scope before closing the opening.
Match the exact legal business and CCB license number through Oregon's license search and review active status.
Operating check, trim and sealant punch list, product schedule, warranties, concealed-repair evidence and permit records where applicable.
Describe the number, condition and goals for each opening. We can connect you with contractors prepared to document repair, insert and full-frame options.
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