Double-Pane & Insulated Glass Replacement in Sunnyvale, CA
Fogged glass is a failed seal, not dirty glass. If the frame is sound, we replace the glass unit and leave your wall alone.
The Haze Is Inside the Sandwich
Replacing failed, fogged, or seal-broken insulated glass units while keeping a sound existing frame.
The two panes in an insulated glass unit are sealed around a spacer with argon between them. When that seal fails, moisture gets in, and no amount of cleaning touches it. The haze is inside the sandwich.
That means the fix is the glass unit, not the window. The frame, the hardware, the trim, and your wall all stay where they are. It is a smaller job, and when it is the right job we would rather quote it than sell you a house full of new windows.
When Glass-Only Is the Right Call
Cloudy or milky glass
It will not clean off from either side because the moisture is sealed between the panes.
Visible moisture or water lines
Droplets or tide marks between the panes, often worst in the morning and after a cold night.
A chalky white film
Mineral deposit left behind as trapped moisture evaporates and condenses over and over.
Only one or two windows affected
The rest of the house is clear. That points at individual failed units rather than a whole-house problem.
A cracked pane in a good frame
Impact damage to the glass with the frame, sash, and hardware all still sound.
The frame still operates properly
It opens, locks, and seals. If it does not, we will tell you the frame is the real job.
How We Do It
- Step one
Confirm the frame is serviceable
Frame, hardware, and glazing bead all checked. If any of them has failed, glass-only is the wrong answer and we say so.
- Step two
Template the glass
Exact size taken off the opening, plus the existing coating and spacer noted so the new unit matches.
- Step three
Order it built to size
Insulated glass units are made to your dimensions. Three to five weeks is typical for a standard build.
- Step four
Swap and re-bed
Old unit out, new unit set, re-bedded and re-beaded, and the drainage path checked before we leave.
Sunnyvale's First Replacement Wave Is Failing Now
First-generation replacement windows installed across Sunnyvale in the late 1990s and early 2000s are now hitting the age where seals give out in batches. If two windows fogged this year, expect more from the same run. We will tell you that up front rather than quoting you a whole house.
We quote the smaller job
If the glass alone solves it, that is the quote you get. No whole-window upsell.
Coating matched to yours
Low-E type and spacer matched so the new unit looks and performs like its neighbours.
Written warranties
Manufacturer cover on the glass unit, our own written cover on the glazing work.
Fogged Glass Questions
There are defogging services that drill the unit, flush it, and vent it. It clears the haze for a while, but the unit is no longer sealed and the argon is gone, so the insulating value does not come back. We replace the unit instead.
Fifteen to twenty-five years is the normal range. South and west elevations fail first because they take the most thermal cycling, which is why Sunnyvale's sun-facing walls tend to go before the rest.
Substantially, because there is no tear-out, no trim work, and no stucco patching. The exact difference depends on size and coating, and it is in the written quote.
Yes. We note the coating and spacer at the template stage so the replacement unit matches its neighbours in tint and reflectance rather than standing out.
Related Services
Send Us the Count and We Will Price the Glass
Tell us how many units have hazed over and roughly what size they are. We measure, template, and quote the glass in writing, and we will say plainly if the frame is the real problem.
Contact DetailsFree in-home measure
(408) 547-4680 — price the glassMonday to Friday 7:30am to 5:30pm · Saturday 8:00am to 2:00pm