San Francisco / Doors & Windows

Full-Frame Window Replacement in San Francisco

Water is staining the wall around the window, the trim feels soft, or the old frame looks too damaged to keep.

Woman inspecting an exposed window opening beside a separate white replacement window.

The symptom

Water is staining the wall around the window, the trim feels soft, or the old frame looks too damaged to keep.

The proposed method

Full-frame replacement removes the existing window frame and sash so the opening can be assessed. Agree on the removal extent, selected installation system, water-management details and finishing responsibilities before work begins. Ask how newly exposed damage would be documented and how any additional repair would be agreed. The method and scope depend on the opening and surrounding construction; this page does not establish that your property needs full-frame work.

Items to discuss

complete window unit, sill pan, flashing membrane, shims, low-expansion insulation, sealant, interior and exterior trim. Clarify which parts or materials would be supplied, which tools would be used, and what documentation is included.

Property context in San Francisco

The air district’s 2011 regional climate description explains that marine air crosses much of San Francisco, contributing to cool and windy conditions. It does not establish the condition of a particular door or building.

Source for local exposure ↗

SF Planning’s window-replacement guide covers historic-property checks, application details and product information. It distinguishes in-kind replacement from expanding an existing window or adding an exterior window, and links to window-design standards. Use the guide to discuss the proposed work with the city. Confirm the address, opening changes and property-specific requirements; this reference does not establish eligibility or product compliance for a property.

Source for planning your work ↗

California licenses contractors by classification, and the Contractors State License Board publishes the current list. Glazing work sits under C-17 Glazing Contractor, so it is reasonable to ask which classification a licence carries and to check the licence number with the board before glass or window work is arranged. The classification list describes the trades the state recognises; it is not a record of any particular company's licence, standing or suitability for your project.

Source for local context ↗

Area-wide context is not a finding about your own property.

What shapes the quote?

The component being changed

Glass-only, hardware-only and complete-frame work involve different materials and labor. Compare proposals for the same work.

Access and concealed condition

Opening size, access, finishes and damage discovered during removal can change the work. Agree how any change will be documented.

The complete proposal

Clarify removal, disposal, weatherproofing, finish restoration and completion checks before comparing totals.

Ask for a written quote and confirm the complete charge before work begins.

Before the visit

A little preparation helps.

Identify the affected opening and describe the symptom.Gather available product labels and previous work records.Explain access restrictions and keep the opening clear.

0 of 3 details ready

Before you decide

Good questions.
Clearer next steps.

What does full-frame window replacement involve?

What should the proposal say about parts, materials and equipment?

Discuss complete window unit, sill pan, flashing membrane, shims, low-expansion insulation, sealant, interior and exterior trim. Ask the provider to distinguish existing parts to inspect, proposed replacements, and tools, materials or reports included in the service. Request a reason for any replacement and confirm compatibility with your equipment. A list of possible items does not mean that every item must be supplied or replaced.

Can a difficult sliding door be repaired without replacing the frame?

A sticking panel can involve rollers, track damage, alignment or worn seals. Ask which condition was observed and whether compatible parts are available. A sound frame may remain in place for a targeted repair; deterioration at the sill or frame can change that scope. Compare the actual findings before choosing a complete replacement.

Does fog between panes mean the whole window needs replacement?

Moisture between the panes is different from condensation on a room-facing surface. A proposal may replace the sealed glass unit while retaining a suitable sash and frame. Ask which component has failed, how the replacement glass is specified and whether the existing frame can support the work.

How do insert and full-frame window replacement differ?

An insert retains a suitable existing frame and places a replacement unit within it. Full-frame work removes more of the assembly and exposes the opening for assessment. Compare retained materials, flashing work, trim restoration and the resulting clear opening rather than treating both proposals as the same job.

What should I compare on a window performance label?

Compare the ratings for the complete product and its suitability for the local climate and project. U-factor and solar heat gain coefficient describe different aspects of performance. Ask which specified unit the label describes; a generic brochure does not establish the rating of the product being supplied.

What information helps prepare a door or window visit?

Describe the opening, how it moves and what changed. Note whether a concern is with glass, the moving panel, hardware or the surrounding wall. If available, gather product labels, earlier invoices and photographs taken without dismantling the assembly. Explain access restrictions and keep people away from broken glass.

What should the written scope include?

Ask which units and components are included, what remains in place, how access and removal are handled, and who restores affected finishes. Confirm product specifications, disposal, weatherproofing and completion checks. Any concealed damage discovered during the work needs an explained change to the agreed scope.

What does full-frame replacement expose that an insert leaves in place?

Removing the existing frame exposes the opening for assessment. An insert retains that frame. Ask which condition or design change supports removing it, and which areas can only be assessed once removal begins.

Does full-frame replacement always mean removing the siding?

The installation type matters. Andersen distinguishes full-frame windows with an installation flange from flangeless full-frame replacements. Ask the installer to identify the proposed system and explain exactly which siding, trim and finishes will be disturbed.

How should hidden damage discovered during removal be handled?

Ask for the observed condition to be documented before extra work is agreed. The written scope can state who assesses the exposed opening, what is already included, and how additional repair work and finishing responsibilities will be confirmed.

Can full-frame replacement change the window size or shape?

It can be part of a project that changes the opening, but removal of the old frame alone does not establish that such a change is suitable. Ask for the proposed opening, surrounding work and project-specific requirements to be assessed separately.

Can different windows in one home need different replacement methods?

Yes. Marvin describes projects using inserts at some openings and full-frame replacement at others. Ask for a window-by-window assessment and a schedule identifying the method, retained parts and finishing scope for each opening.