Bay, bow, and picture windows in California

Before replacement, check every window systematically and write the failures down. Fogged or cloudy glass between the panes points to a failed seal, draughts with the window closed and locked point to a sealing failure, and warped, rotted, or cracked frames that no longer open and close smoothly point to a frame problem. That list, room by room, is what turns a vague whole-house quote into a per-window scope.

Decide access and protection before the crew arrives. You will need access to each room, and it helps to be available for questions, while floors and furniture should be protected and cleaned up each day. Agree how each day ends — rooms left usable or not, dust and debris handled, windows secured overnight — so the staged work does not disrupt the house more than it needs to.

Ask for the scope per window in writing, including frame material, glass type, insert or full-frame method, and any rot or structural repair in the opening. A single lump sum with no breakdown hides which windows are driving the price and which repairs are included, and it makes later questions about a single window almost impossible to answer.

Price moves first on how many windows, and their sizes. A whole-house job is not a per-window price multiplied blindly, because sizes, access, and second-storey work vary by opening, and a per-window scope is the only way to see that variation. Standard windows are a different job from large, bay, bow, or picture windows, and the scope should say so.

Frame material and glass options move the price second. Vinyl, wood, fibreglass, and aluminium differ in cost and upkeep, and double or triple glazing, low-E coatings, and noise reduction each add cost that should be tied to the room that benefits from it. A glass upgrade in a noisy street-facing room is a different spend from the same upgrade in a quiet back room.

Method and repairs are the third factor. Full-frame replacement, which removes the old frame entirely, is a bigger job than insert replacement inside the existing frame, and rot or structural repair in an opening adds work that a standard replacement price does not include. Access, second-storey work, and any repair found once the old window is out should be handled through the written per-window scope, not as an afterthought.

At handover, test every window the way you will use it: open, close, lock, and check the seal, in each room, in daylight. Look at trims and finishes, check for gaps or draughts with the window closed, and note any window that does not operate smoothly. Those checks, done room by room before sign-off, are far easier to resolve than the same faults found weeks later.

Ongoing care depends on frame and glass, and it should follow the manufacturer's guidance for those materials. Cleaning, hardware checks, and seal inspections are small jobs that protect a large investment, and they are best done seasonally rather than when a fault appears. If condensation appears, first work out which kind it is — between panes or on the surface — because the two kinds have different causes and different fixes.

Keep the paperwork from the job together: the per-window scope, frame and glass details for each room, and any warranty information. That file is useful if a single window needs attention later, if you replace further windows and want to match what was fitted, or if a question arises about what was installed in a particular opening.

Use this checklist to plan window replacement room by room. First, check every window systematically: does it lock, open, close, and seal, is glass fogged between the panes, and are there water stains around the frame? Write the failures down room by room, because that list is what turns a vague whole-house quote into a per-window scope.

Second, rank rooms by priority — usually the worst rooms first, such as bedrooms and living areas with draughts, noise, or fogged glass — and decide whether to replace all at once or stage by room. Third, agree a written per-window scope, including frame material, glass type, insert or full-frame method, and any rot or structural repair included. Fourth, agree access, floor and furniture protection, daily clean-up, and how rooms are secured overnight during staged work.

Fifth, plan the handover check. When work is finished, test every window the way you will use it — open, close, lock, check the seal — in each room, in daylight, and note any window that does not operate smoothly before sign-off. Keep the per-window scope, frame and glass details for each room, and warranty information together for future single-window questions or matching.

After you call, the first thing that should happen is a room-by-room conversation, not a whole-house price. Expect to be asked which windows fail — fogged glass, draughts, sticking frames, broken locks — and what matters most per room, whether energy, noise, light, or ease of cleaning, because those answers shape a per-window scope rather than a single default repeated across the house.

Next comes measurement and a written per-window scope, then installation room by room. Measurement should confirm each opening, the scope should name frame material, glass type, and insert or full-frame method for each window, plus any rot or structural repair included, and installation should check each opening for damage before anything new goes in. Rooms should be protected, cleaned up each day, and secured overnight during staged work.

After work, expect a test of every window the way you will use it — open, close, lock, check the seal — in each room, in daylight, before sign-off. Trims and finishes should be checked, and any window that does not operate smoothly should be reported before sign-off rather than lived with. Keep the per-window scope, frame and glass details for each room, and warranty information together for future single-window questions.