Licensed, Bonded & Insured
CSLB #1030917. Don’t take our word for it — the state publishes the record.
Nine years under this licence · ~30 years in the trade 980+ Google reviews · 4.8★
Fresno, Visalia, Sacramento, Bakersfield and the Central Valley.
Certificates of insurance issued on request, naming the parties you need.
- CSLBLicence #1030917,
active - 10-yrWorkmanship
warranty, standard - 25-yrExtended coverage
available - BondedBond and comp
current on file
- GAF Master Elite — fewer than 3% of U.S. roofers
- Our own crews, not brokered subcontractors
Book a free inspection
Two minutes, three questions. We’ll come out, record what we find, and show you.
Free for homeowners · $299 for real estate transactions
Verify it yourself
A licensed roofing contractor is a thirty-second CSLB check
California requires the licence number on advertising, which is why you see #1030917 at the bottom of our trucks, our estimates and every page of this site. What almost nobody tells you is that the number is only useful if you actually run it.
Open the state’s Check A License tool, type 1030917, and read what comes back. Status should say active. The record also shows the contractor bond and the workers’ compensation coverage on file, plus any disciplinary history. It takes less time than reading this paragraph.
Do it to us. Then do it to whoever else quoted you.
We’ve held this licence for nine years, behind roughly thirty years in the trade. We write it that way on purpose — the licence date is public, and rounding it into “30 years in business” is the kind of claim that falls apart the moment somebody checks. On a site built around telling homeowners to verify things, that would be a strange corner to cut.
Why the bond and the comp coverage matter
The bond is the state’s consumer-protection mechanism, and it’s worth knowing it exists. Workers’ compensation is the one people skip past, and it’s the one that concerns you most directly: crews are going to be twenty feet up over your house for several days. Coverage is not a detail you want to discover the status of afterwards.
Certificates of insurance are issued on request, naming whichever parties you or your lender require. Ask for one before work starts. Any legitimate contractor will hand it over without a conversation about it.
Manufacturer certifications
Certifications are what make the long warranties possible
Manufacturers don’t extend their best coverage to just any installer. The certification is the gate.
GAF Master Elite
Fewer than 3% of U.S. roofing contractors hold it. It requires licensing, insurance and a documented track record, and it unlocks GAF’s extended system warranties — coverage you cannot buy from an uncertified installer at any price.
Owens Corning Preferred
The same principle on the other major shingle system. Which manufacturer we recommend depends on the roof, not on which logo we prefer to put in a brochure.
Certified metal installer
Metal panel systems are unforgiving — the details are in the flashing, the fastening pattern and the expansion allowance. We’re a certified installer for the manufacturer whose panels we specify.
Straight answers
What our warranty actually covers
Two separate warranties come with a roof, they cover different failures, and most homeowners are never told the difference.
| Coverage | Term |
|---|---|
| Workmanship — our installation | 10 years, standard |
| Extended coverage — system-dependent | Up to 25 years |
| Commercial systems | Set per project |
Workmanship coverage is ours: if something we installed was installed wrong, we come back. Manufacturer coverage is theirs, and it covers the material. Roofs rarely fail because a shingle was defective — they fail at flashings, valleys and penetrations, which is workmanship. That is why the term on the first row is the one worth reading closely, and why our certifications matter for the second.
Before you sign anything
Four things to ask any roofer, including us
Ask for the licence number and run it. Ask whether the crew on your roof is theirs or brokered out to whoever was available that week — ours are ours, start to finish. Ask for the certificate of insurance in writing. And ask to see photos or video of the actual failure they say you have.
That last one is the whole reason this company works the way it does. Every customer gets recorded footage of what’s wrong before anyone asks them to pay for it, which is a habit that also happens to make a warranty claim straightforward two years later — there is a record of what the roof looked like when we got there.
If a contractor gets uncomfortable at any of those four questions, you have learned something useful for free. More on how we work is on the story behind Grandmark, and if you want to see what customers say after the job, the reviews are here. Ranges for what the work costs are on the replacement page and the repair page, published rather than quoted on request.
Straight answers
Frequently asked questions
What is Grandmark’s contractor licence number?
CSLB #1030917. You can verify status, bond and workers’ compensation on the Contractors State License Board’s Check A License tool by entering 1030917. We’ve held the licence for nine years, behind roughly thirty years of trade experience.
Are you bonded and insured?
Yes — licensed, bonded and insured, and all three appear on the state record. Certificates of insurance are issued on request naming whichever parties you or your lender require.
How long is the workmanship warranty?
Ten years as standard, with extended coverage up to 25 years depending on the system installed. Commercial warranty terms are set per project and confirmed in writing before work begins.
What’s the difference between a workmanship warranty and a manufacturer warranty?
Ours covers installation. Theirs covers the material. Most roof failures happen at flashings, valleys and penetrations rather than in the material itself, which makes the workmanship term the more important of the two for most homeowners.
Does the warranty transfer if I sell the house?
Manufacturer system warranties are generally transferable, subject to that manufacturer’s conditions and a transfer window. Ask us before you list the house and we’ll tell you exactly what applies to the system on your roof.
Run the licence. Then let us look at the roof.
Free inspection, recorded footage of whatever we find, and a written flat-rate price before anything starts.