San Mateo County, California
Automatic Sliding Doors in San Mateo County, CA
In San Mateo County, Guardian Door LLC handles automatic sliding door installation, repair, and sensor adjustment for retail, grocery, medical, office, and municipal entrances. Describe the problem and we’ll confirm scheduling and what happens next.
- Licensed & insured
- Fast response
- 5.0 on Google
California CSLB #1025448
Verify on the CSLB siteFully insured
Certificate of insurance on request
Commercial & industrial only
No residential garage doors
Based in Sacramento
Northern California service area
Your Automatic Sliding Doors Team in San Mateo County
Guardian Door LLC provides automatic sliding door installation, repair, and sensor adjustment for the listed cities in San Mateo County. San Mateo County coverage includes 11 communities. The closest to our Sacramento base is Daly City; the farthest is Half Moon Bay, about 92 miles out. More detail is on our main automatic sliding doors page.
- Motion and presence sensor adjustment
- Doors that stay open or keep re-opening
- Operator replacement on existing entrances
- Operators, controls, and belts
- Safety device testing
- Single-slide, bi-parting, and telescoping entrances
Automatic door issues we diagnose in San Mateo County
- A door that stays open or keeps re-opening is most often a sensor issue — the wrong detection pattern, a misaligned safety beam, a reflective floor, or displays moving inside the detection zone.
- That is usually an adjustment visit, not a new operator.
- Doors that won’t open, run rough, or stop mid-travel get a systematic check of power, controls, sensors, and the mechanical load before parts are swapped.
Automatic entrance equipment we service
- We service the major commercial sliding operators found in Northern California buildings.
- A photo of the header label lets us confirm parts availability before scheduling.
- High-traffic entrances such as grocery, medical, and retail benefit from service at least annually, and often semi-annually.
Safety standards and local requirements
- Requirements for an automatic entrance depend on the specific opening — its fire rating, egress role, accessibility function, and the occupancy of the building.
- They are set by the building and fire authority with jurisdiction over your address, which in San Mateo County can be a city department or the county, depending on where the property sits.
- We check what applies to your opening before recommending work, and we tell you when a component repair is not the same as a full compliance inspection of the assembly.
Our 5-Step Automatic Sliding Doors Process
- In San Mateo County, our work follows 5 service-specific steps, from entrance assessment through safety verification.
- The detailed process below explains what each stage covers so you know what to expect before requesting a visit.
Recent Automatic Sliding Doors Projects
Photos from Guardian Door job sites across Northern California. Explore examples of the work we offer in San Mateo County, CA. Project locations are labeled where available.
How Automatic Sliding Doors Works in San Mateo County, CA
- 1
Entrance assessment
We evaluate the operator, header, track and carriers, panels, sensors, and controls, and identify anything that no longer meets safe operating standards.
- 2
Scope and quote
You get written pricing that separates required safety corrections from optional upgrades, so nothing is bundled in without your say.
- 3
Install or repair
New sliding systems, operators, header assemblies, sensors, and controls are installed; existing units are repaired and rebuilt where the equipment supports it.
- 4
Sensor and timing setup
Activation patterns, presence sensing, hold-open time, and opening and closing speeds are set per the manufacturer's specifications.
- 5
Safety verification
The finished entrance is cycled and checked for safe closing, correct sensor coverage, breakout function, and ADA-compliant clear width.
Automatic Sliding Doors in San Mateo County, CA — FAQs
Is San Mateo County inside your automatic sliding doors service area?
Yes — we cover the listed cities in San Mateo County from Sacramento. Timing depends on the scope of work; share the address and what the door is doing and we’ll confirm.
What should I have ready before the visit?
Configuration — single slide, bi-parting, telescoping, or unsure; Operator brand and model if the header label is readable; Symptoms — won't open, stays open, closes too fast, noisy, error light; Whether the entrance is your only accessible entry; Business hours and preferred service window.
Which San Mateo County cities do you cover?
We currently cover Burlingame, Daly City, Foster City, Half Moon Bay, Menlo Park, Millbrae, Pacifica, Redwood City, San Bruno, San Mateo, and South San Francisco in San Mateo County.
Why does my automatic door stay open or keep re-opening?
Almost always a sensor issue: a presence or activation sensor with the wrong pattern, a dirty or misaligned safety beam, a sensor picking up a reflective floor, or moving objects like flags and displays inside the detection zone. It's a diagnostic-and-adjustment call, not usually a new operator.
Can you replace just the operator and keep the existing doors?
Often yes. If the panels, glass, and framing are sound, a new operator and header can be fitted to the existing package, which costs considerably less than a full entrance replacement.
How often should automatic sliding doors be inspected?
Industry practice and the AAADM program call for a daily safety check by the owner and a professional inspection at least annually — semi-annually for high-traffic entrances like grocery, medical, and retail.
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Local service
Cities we serve in San Mateo County
- San Mateo, CA
- Redwood City, CA
- Daly City, CA
- South San Francisco, CA
- San Bruno, CA
- Millbrae, CA
- Burlingame, CA
- Foster City, CA
- Pacifica, CA
- Half Moon Bay, CA
- Menlo Park, CA