Is replacing every window at once always less expensive?
Not always. One project can reduce repeated setup and mobilization, but total value depends on product, access, finish work, financing, urgency and whether every opening truly needs replacement.
How should a phased project be grouped?
Useful groupings include condition, safety, room priority, elevation, floor, operating style or coordination with other remodeling work.
Will later phases match the first?
They may, but exact series, colors, glass, grids and hardware can change. Preserve identifiers and ask about expected availability before choosing a phased plan.
Should energy savings determine the entire scope?
Energy performance matters, but comfort, moisture, operation, safety, installation quality, project cost and the rest of the building envelope should be considered together.