Guardian Firestop and Insulation LLC, C-2 Insulation and Acoustical Contractor in Livermore, CA
Guardian Firestop and Insulation LLC operating as a limited liability holds California contractor license #1125232, which is currently expired (lapsed Aug 31, 2026) and not valid to contract until it is renewed. First issued in 2024, the license has been on the CSLB roster for 2 years. It carries a single CSLB classification: C-2 — Insulation and Acoustical Contractor. Records show an active surety bond on file with Western Surety Company and an exempt workers' compensation status (no employees on payroll). The business is based in Livermore, in Alameda County, California.
- License Number
- 1125232
- Issued
- Aug 16, 2024
- Status
- CLEAR
- Expires
- Aug 31, 2026
- Entity
- Limited Liability
- Surety
- Western Surety Company
- Bond Number
- 67150438
- Effective
- Jul 26, 2024
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Jul 24, 2024
- Expires
- —
This contractor has a compliance issue in its public CSLB record:
- License expired
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Guardian Firestop and Insulation LLC licensed in California?
Guardian Firestop and Insulation LLC previously held California Contractors State License Board license number 1125232, but the license expired on August 31, 2026 and is not currently valid. It was first issued on August 16, 2024.
What does Guardian Firestop and Insulation LLC specialize in?
Guardian Firestop and Insulation LLC is licensed for one CSLB classification: C-2 Insulation and Acoustical Contractor.
Where is Guardian Firestop and Insulation LLC headquartered?
Guardian Firestop and Insulation LLC is headquartered at 1453 Reginald Court, Livermore, CA 94550, in Alameda County, California.
Does Guardian Firestop and Insulation LLC have an active surety bond on file with CSLB?
Yes. Guardian Firestop and Insulation LLC has an active California contractor surety bond filed with Western Surety Company.
Does Guardian Firestop and Insulation LLC carry workers' compensation coverage?
Guardian Firestop and Insulation LLC reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Guardian Firestop and Insulation LLC's contractor license?
You can verify Guardian Firestop and Insulation LLC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1125232.
- WC coverage startsJul 24, 2024
- Bond activeJul 26, 2024
- License issuedAug 16, 2024
- License expiredAug 31, 2026
- Attical INC#1126472Fremont·C-2 Insulation and Acoustical Contractor
- Nitram Acoustics#1121212Hayward·C-2 Insulation and Acoustical Contractor
- Rywen Insulation INC#1140414San Leandro·C-2 Insulation and Acoustical Contractor
- Prc Insulation INC#1146785Hayward·C-2 Insulation and Acoustical Contractor
- Attic Solutions of California LLC#1146271San Leandro·C-2 Insulation and Acoustical Contractor
- Imperial Insulation LLC#1144362San Leandro·C-2 Insulation and Acoustical Contractor
- Pro Insulation & Rodents LLC#1138592Hayward·C-2 Insulation and Acoustical Contractor
- All State Insulation INC#1148090Fremont·C-2 Insulation and Acoustical Contractor
Working a California job with Guardian Firestop and Insulation LLC, or chasing an unpaid invoice? These free tools track your mechanics lien deadlines and rights under California Civil Code §§8200–8848.
- California preliminary notice deadline calculatorFind your 20-day deadline and the lien rights at risk.
- Do I need a preliminary notice in California?Answer a few questions to see if the 20-day notice applies.
- Did I lose my California lien rights?Check whether your mechanics lien window has passed.
- Unpaid construction invoice in CaliforniaYour options and deadlines for collecting on a California job.
Own Guardian Firestop and Insulation LLC? Claim or correct this profile