How long does a whole-house replacement take?

Typically several days on site for installation plus additional days for trim and finishing, after a lead time of several weeks for made-to-measure units.

Do you replace windows one elevation at a time?

Yes. The house is never widely open, and each elevation is closed and weathertight before the next is started.

Can you match an existing window style?

Usually the sightlines and divided-lite arrangement can be matched closely. Exact matches to historic units are a different conversation and sometimes involve restoration rather than replacement.

Windows & DoorsAugust 14, 20251 min read

What to consider before replacing windows

The unit you choose matters. How it is installed matters more. A short guide to the decisions that determine whether a replacement actually performs.

Concept bronze-framed glazing and natural-oak entry door with finished interior returns

Concept image — replace with documented site photography

Window replacement is sold on the product and delivered by the installation. A well-specified unit fitted without a sill pan, without air sealing, or out of square will underperform a modest unit fitted properly.

Full-frame or insert

An insert replacement fits a new unit inside the existing frame. It is quicker and less disruptive, and it reduces the glass area slightly. A full-frame replacement removes everything back to the rough opening, which allows the flashing and air sealing to be rebuilt and any concealed damage to be found and repaired.

If the existing frames are sound, an insert is a reasonable choice. If there is any sign of water, full-frame is the only way to know what you are dealing with.

What a proper installation includes

A sill pan or equivalent flashing detail under the unit, so any water that gets in is directed back out.
Flashing lapped in the correct sequence, each layer shedding onto the one below.
Shims placed so the unit is square and the sashes operate evenly, not just packed to fill a gap.
Low-expansion foam or backer rod and sealant around the frame — not expanding foam that bows the jambs.
Interior returns and casing finished, not caulked.

Measure every opening

In older masonry, no two openings are the same. Every opening should be measured individually and scheduled. A quote based on a count of windows and one measurement is a quote that will produce site problems.

Expect to find something

On most whole-house replacements at least one opening reveals concealed damage. We photograph it, explain it, and price the repair before continuing.

On performance claims

Energy performance figures belong to the manufacturer and are measured under laboratory conditions. We will pass on the published figures for whatever unit you choose. We will not attach a saving estimate to them, because the honest answer depends on your house, your heating system, and your habits.

Written by Altesora