Sliding Glass & Patio Door Replacement in Sunnyvale, CA
The original patio slider is usually the leakiest, loudest, least secure opening in the whole house.
The Track and the Threshold Do the Real Work
Sliding, gliding, and multi-panel patio door systems, including track, roller, and threshold work.
A patio door is the largest moving assembly in a house. A panel can weigh over a hundred pounds and it travels on rollers along a track that sits in a threshold taking water, grit, and foot traffic every day.
That is why the glass is rarely the problem. Doors bind because rollers have flattened, tracks have worn, or the threshold has moved with the slab. A new door dropped onto a bad sub-sill will bind again within a year, so we correct the sill first.
When the Slider Needs Replacing
It takes both hands or a shoulder
A door that needs force is riding on failed rollers or a deformed track.
Rollers grind or jump the track
You can hear it. Flattened wheels chew the track, which then chews the next set of wheels.
The threshold pools water
Standing water at the sill, or a threshold that has separated from the slab, means water is getting under the assembly.
Daylight at the meeting stile
If you can see light where the panels overlap, you are heating and cooling the back yard.
The lock no longer engages
A keeper that misses is a security problem and usually a sign the frame has racked out of square.
Single-pane glass in a wall-sized opening
The largest piece of glass in the house with the least insulating value. It dominates the room's comfort.
How We Do It
- Step one
Measure and check the slab
Opening dimensions plus the condition of the sill and the slab beneath it, because that decides the scope.
- Step two
Correct the threshold first
Threshold and sub-sill repaired or replaced before anything new is set. This is the step most quotes leave out.
- Step three
Set the frame dead level
Frame levelled and squared, then panels hung and aligned so they meet cleanly along the full stile.
- Step four
Tune rollers, lock, and screen
Rollers adjusted to the track, lock and keeper verified to engage, screen fitted and running properly.
Settled Slabs Are a Sunnyvale Problem
Sunnyvale back yards get used year-round, so the patio slider takes daily traffic, and fifty-year-old aluminum tracks show it. On the older tracts the slab has often settled a little, which tilts the threshold and is why the door binds at one end. That correction is part of the job in our quote, not an add-on discovered on install day.
Threshold work included
Sill and sub-sill correction quoted up front rather than sprung on you mid-install.
Locks verified
Lock and keeper engagement checked and adjusted, because patio doors are a common entry point.
Written warranties
Manufacturer cover on the door, our own written cover on the installation.
Patio Door Questions
Sometimes, and if that genuinely fixes it we will do that instead of selling you a door. It works when the track is still true and the frame is square. If the track is chewed or the threshold has moved, new rollers buy you a few months.
A straight swap is a single day. If the threshold or sub-sill needs rebuilding, or the opening is being widened, budget two.
Yes. Three and four panel sliders, and pocketing systems that disappear into the wall. They need a wider opening and, for pocketing, a wall cavity to receive the panels, so we confirm feasibility at the measure.
Noticeably, yes, because you are replacing a worn single-pane assembly with a sealed insulated one. If noise is the main goal, ask about a laminated glass package on the door.
Related Services
Have Us Look at the Sill, Not Just the Door
We measure the opening, check the slab and threshold, and quote the door and the sill work together so the price does not move once the old unit is out.
Contact DetailsFree in-home measure
(408) 547-4680 — book the door measureMonday to Friday 7:30am to 5:30pm · Saturday 8:00am to 2:00pm