Marin County, California
Hollow Metal Doors & Frames in Larkspur, CA
In Larkspur, Guardian Door LLC handles hollow metal door and frame installation, including fire-rated openings and full hardware sets for commercial buildings, schools, healthcare, industrial, and multifamily properties. 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 Hollow Metal Doors Team in Larkspur
Guardian Door LLC provides hollow metal door and frame installation, including fire-rated openings and full hardware sets for Larkspur and nearby Marin County communities. Larkspur is about 72 miles southwest of our Sacramento base, in Marin County. We also cover nearby Corte Madera, Mill Valley, and San Rafael. For the full scope of this service, see our hollow metal doors overview.
- Fire-rated door and frame assemblies
- Welded and knock-down hollow metal frames
- Gasketing, coordinators, and thresholds
- Door-only replacement in sound existing frames
- Hinges, closers, exit devices, and locksets
- Security and exterior steel doors
Hollow metal openings we evaluate in Larkspur
- We start by checking the frame: whether it is plumb and sound, whether its label matches the rating the opening needs, and whether the hardware preps line up.
- That tells us if the existing frame can stay or needs replacement.
- Stock sizes and common ratings can arrive quickly; custom sizes, welded frames, and special finishes take longer.
- Lead time is part of the quote.
Doors, frames, and hardware we install
- Hollow metal doors, welded and knock-down frames, and the hardware that goes with them — hinges, closers, exit devices, locksets, coordinators, and gasketing — installed to template.
- On a rated opening the hardware is part of what makes the assembly compliant, so we specify and install it as a set.
Fire-rated openings and local requirements
- Requirements for a hollow metal opening 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 Larkspur can be a city department or the county, depending on where the property sits.
- We verify 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 Hollow Metal Doors Process
- In Larkspur, our work follows 5 service-specific steps, from opening survey through code verification.
- The detailed process below explains what each stage covers so you know what to expect before requesting a visit.
Recent Hollow Metal Doors Projects
Photos from Guardian Door job sites across Northern California. Explore examples of the work we offer in Larkspur, CA. Project locations are labeled where available.
How Hollow Metal Doors Works in Larkspur, CA
- 1
Opening survey
We field-measure the opening, confirm wall type and handing, and identify the required fire rating and hardware set from the existing label and use of the space.
- 2
Specification and quote
Door gauge, frame type, rating, finish, and the complete hardware schedule are quoted in writing before ordering.
- 3
Fabrication and delivery
Doors and frames are ordered with factory prep and labels for the specified rating and hardware.
- 4
Installation
Frames are set plumb, square, and anchored to the wall type; doors are hung and the full hardware set installed to template.
- 5
Code verification
Rated openings are checked for self-closing, positive latching, correct clearances, intact labels, and required gasketing.
Hollow Metal Doors in Larkspur, CA — FAQs
Can you send a technician to Larkspur for hollow metal doors?
Yes — we cover Larkspur and nearby Marin County communities from Sacramento. Timing depends on the scope of work; share the address and what the door is doing and we’ll confirm.
What is the difference between a welded and a knock-down frame?
A welded frame arrives as one rigid unit and is set before the wall is finished — it's stronger and standard on new construction and masonry. A knock-down frame ships in three pieces and assembles around an existing finished wall, which makes it the usual choice for replacement work.
How do I know if my door needs to be fire-rated?
Look for a metal label on the hinge edge of the door and on the frame — it states the rating. Rated openings are typically required at stairwells, corridors, occupancy separations, and mechanical rooms. If a label is missing or painted over, the opening usually needs to be re-established as a rated assembly.
Can you replace just the door and keep the existing frame?
Often yes, when the frame is plumb, sound, and its label is intact and matches the required rating. We verify frame condition and hardware prep locations first — a new door hung in a racked or unrated frame doesn't give you a compliant opening.
What should I have ready before the visit?
Opening location, size, and handing (or we field-measure); Required fire rating if known, or a photo of the existing frame label; Wall construction — stud, masonry, or existing frame reuse; Hardware needs — panic device, lockset, closer, card reader prep; Whether the opening must stay secured during the swap.
Where do you dispatch to Larkspur from?
We dispatch from Sacramento. Larkspur is roughly 72 miles southwest of our base, inside our 100-mile service radius.
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