California State Insulation & General Contractor
Verify license (707) 546-3177
CSLB #795223 · C-2 + B · Santa Rosa

One licensed shop for the whole building envelope.

Most jobs need an insulator and a builder. California State Insulation is both — a single California contractor holding a C-2 insulation license and a B general-building license. Concrete and framing through batt, blown-in and spray foam: one licensed crew owns it end to end.

Call (707) 546-3177 See what we build →
  • Owner-run since 2001
  • Bonded $15,000 & insured
  • BuildZoom top 10% in CA
The argument

The building envelope is one system. Most jobs split it across two trades.

A wall is a stack of layers, and a normal project hands part of it to an insulator and part of it to a builder — two licenses, two schedules, a seam where blame lives. We hold both classifications, so the whole section is ours.

GRADE R-VALUE · TITLE-24
  1. B

    Exterior finish & sheathing

    The weather skin — siding, sheathing, the parts that shed rain.

  2. B

    Framing — studs, plates, headers

    The skeleton. Walls, openings, load paths, additions.

  3. C-2

    Insulation — batt · blown-in · spray foam

    The thermal break. R-value that meets Title-24.

  4. B

    Slab & subfloor

    What everything stands on, tied to the footing.

  5. B

    Concrete foundation & footing

    Below grade. Where the load finally rests.

  6. Two licenses. One crew. No seam to point at.

Why trust a name you just met

We carry the job on things
you can actually check.

0+
Years under one owner
Since 2001
0
CSLB classifications
C-2 insulation + B building
Top 0%
Of CA contractors
BuildZoom score 103
$0K
Project capacity
Bonded & insured

No wall of five-star reviews. On purpose.

We're a small, owner-run shop, and we'd rather earn your trust with paper than with testimonials you can't verify. The State of California keeps a public record on Alvaro Beltran's license — classifications, bond, and standing. Pull it up before you ever call us.

CSLB PUBLIC RECORD #795223 Verify the license, live →
Capabilities

What one license lets us do.

Two CSLB classifications, drawn out as the actual work. Nothing here gets subbed to a license we don’t hold.

C-2

Insulation & Acoustical

Spray polyurethane foam being applied between studs ILLUSTRATIVE

Spray foam

Open- and closed-cell polyurethane. Air-sealing and high R-value where cavities are tight or irregular.

Closed-cell insulation packed into a wall cavity ILLUSTRATIVE

Batt & roll

Fiberglass and mineral-wool batts cut tight to the framing — walls, floors, ceilings.

Blown-in & loose-fill

Attics, retrofits, and additions blown to an even, code-rated depth — fast coverage over odd geometry.

Title-24 & energy

Insulation specified to pass California’s Title-24 energy code, the part inspectors actually sign off.

Acoustical & sound

Sound-rated assemblies for party walls, media rooms, and multifamily separation.

B

General Building

New wood-frame structure under construction ILLUSTRATIVE

Framing & structural

Walls, openings, headers, load paths — the skeleton the whole envelope hangs on.

Crew pouring a concrete foundation ILLUSTRATIVE

Concrete & foundations

Footings, stem walls, and slabs poured to carry the load you build on.

Remodels & additions

Open up, add on, or re-skin — structure and insulation handled by the same crew, same license.

Whole-envelope builds

Ground-up work where one shop is accountable from the footing to the finished thermal shell.

How a job runs

From the first walk-through to the final sign-off.

01

Walk the job

A real on-site look — attic, walls, foundation, whatever the scope touches. We tell you what the envelope actually needs, not what’s easiest to sell.

02

Scope & Title-24

A written plan and a bonded bid, with the insulation specified to pass California’s Title-24 energy code. No surprises mid-job.

03

Build it — one crew

Concrete, framing, and insulation run by the same licensed shop. No handoff between an insulator and a builder, no schedule gap.

04

Verify & close

We carry it through final inspection and sign-off. You keep the paperwork — and a license number you can check any time.

A wood-framed house at the structural stage ILLUSTRATIVE
SANTA ROSA, CA · 95407
The shop

One owner. 25 years. No middle layer.

Alvaro Beltran has owned and run California State Insulation out of Santa Rosa since 2001. When you call, you’re talking to the person whose name is on the license — not a call center, not a salesperson working a quota.

Over those years the shop earned both a C-2 insulation classification and a B general-building classification, which is unusual for a crew this size and the reason it can own the whole envelope instead of subbing half of it out. It’s bonded, insured, and rated in the top 10% of California contractors by BuildZoom — facts you can confirm before a single dollar changes hands.

Alvaro Beltran OWNER · CSLB #795223
Straight answers

Questions worth asking first.

Can’t find it here? Call (707) 546-3177 — you’ll reach the owner.

It means one licensed shop can legally do the structural work and the insulation. On most projects those are two separate contractors with two contracts and a seam between them. With us there’s a single point of accountability for the whole building envelope.

Yes. CSLB license #795223, active, with a $15,000 contractor’s bond through Hudson Insurance Company, plus insurance. You can confirm all of it on the State of California’s public license lookup — the link is in the header and footer.

Yes. We specify insulation to meet California’s Title-24 energy code so the work passes inspection. It’s a routine part of how we scope insulation jobs, not an add-on.

We’ve carried projects up to roughly $600K in value — from single-room insulation retrofits to ground-up framing, concrete, and the full thermal envelope.

We’re a small, owner-run shop and we’d rather not point you at testimonials you can’t verify. Instead we lead with the public record: license standing, classifications, bond, and an independent BuildZoom rating in the top 10% of California contractors. Check the license, then call.

Santa Rosa and the surrounding Sonoma County / North Bay area. Call (707) 546-3177 and we’ll tell you straight whether your job is a fit.

Talk to the owner

Got an envelope that needs one shop?

Insulation, framing, concrete — or all three. Call and you’ll get a straight read on whether we’re the right crew, from the person whose license is on the job.

(707) 546-3177 calstate707@gmail.com