Public Record · California Contractor

Is International Waterproofing & Roofing licensed, insured & complaint-free in California?

International Waterproofing & Roofing has held an active California contractor license (CSLB #739431, B) for 28 years, with no open enforcement actions on record as of June 27, 2026, according to the California Contractors State License Board (CSLB).

Contractor record · CSLB #739431

International Waterproofing & Roofing

General Building (B) · San Francisco, CA
License Active

Active · no open actions

License status is CLEAR with no open enforcement actions on record, per the California Contractors State License Board (CSLB).

As of June 27, 2026CSLB code: CLEARVerify on CSLB
License #
CSLB #739431
Classification
B
General Building (B)
Years licensed
28
since August 18, 1997
Contractor's bond
Active
$25,000
The full dossierRedacted preview
Bond suretywho to file a claim against
Bond number
How to make a bond claim
What “Active · no open actions” means + what to ask
License expiration date
All 2 classifications held
Registered business entity & contact
Dated certificate PDF — emailed with your receipt

Unlock every field above for International Waterproofing & Roofing — including who to file a claim against the $25,000 bond. Delivered as a dated certificate PDF, emailed with your receipt. Public records, not a background check.

$9 · instant PDF · emailed with receipt

Principals on record · CSLB

SANKOWICH STEPHEN ANTHONYChief Executive Officer/President
SUHRKE ROGER PAULResponsible Managing Employee
SANKOWICH ANTOINETTE MADELYNChief Executive Officer/President
3 more principals on record

Workers’ compensation · CSLB

Workers' Compensation Insurance
Carrier
STATE COMPENSATION INSURANCE FUND
Policy
9073063
Effective
October 1, 2018
Expires
October 1, 2026

What this record means

How to verify this yourself

Every fact on this page comes from the California Contractors State License Board (CSLB). You can confirm it directly: look up CSLB license #739431 on the official CSLB site. This page is current as of June 27, 2026; the CSLB record is updated continuously.

What the contractor's bond covers

California requires most licensed contractors to carry a $25,000 contractor's bond. It can pay certain claims for license-law violations — it is not insurance for your project and is not a measure of work quality. The CSLB lists the surety and bond number.

What this record does and does not tell you

The California Contractors State License Board (CSLB) tracks license status, classification, bond, and workers'-comp. It does not rate work quality, track general-liability insurance, or collect customer reviews. Use it to confirm the license is real and in good standing, then check references and a written contract separately.

What classification B covers

CSLB #739431 is classified General Building (B). A California contractor is licensed only for the classifications on record; work outside them may fall outside the license. The full classification list is on the official CSLB record.

Common questions

Is International Waterproofing & Roofing licensed in California?

Yes. As of June 27, 2026, the California Contractors State License Board (CSLB) lists International Waterproofing & Roofing with an active contractor license, CSLB #739431 (classification B), in a CLEAR status.

Is International Waterproofing & Roofing insured?

As of June 27, 2026, the California Contractors State License Board (CSLB) shows an active workers'-compensation policy on file for CSLB #739431. This covers workers' comp; it does not by itself confirm general-liability coverage, which the CSLB does not track.

Does International Waterproofing & Roofing have complaints or violations?

As of June 27, 2026, the California Contractors State License Board (CSLB) shows no open enforcement actions, citations, or disciplinary bonds on record for CSLB #739431. The CSLB is the authoritative source for complaint history.

Who runs International Waterproofing & Roofing?

The California Contractors State License Board (CSLB) lists 6 principals on record for CSLB #739431, shown by name and title in the personnel section below.

Is International Waterproofing & Roofing bonded?

As of June 27, 2026, the California Contractors State License Board (CSLB) shows an active contractor's bond on file for CSLB #739431. California requires a $25,000 contractor's bond; it protects against certain license-law violations, not a guarantee of work quality.

How long has International Waterproofing & Roofing been licensed?

The California Contractors State License Board (CSLB) shows CSLB #739431 was first issued on August 18, 1997, about 28 years ago.

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This record compiles California Contractors State License Board (CSLB) data — license, insurance, principals, and enforcement — that CSLB publishes across separate pages, current as of June 27, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.