Johnson's Insulation — quieter rooms, lower bills, and healthier homes.
A full-service insulation company serving the Bay Area from Oakland — attics, crawl spaces, walls, energy audits and meticulous cleanup. Licensed, insured, and obsessed with the details that matter.
Our thanks to those who've served and our senior neighbors (65+). Just mention your discount when you request a quote — valid ID required at the estimate.
BPI Certified Professional — Miquan Johnson
Building Performance Institute certification means every assessment and install follows nationally recognized standards for energy efficiency, safety and indoor air quality. Miquan Johnson personally oversees the work on every job.
Trusted materials from industry-leading brands
We install only proven, code-compliant products from manufacturers with decades of performance behind them.
- Owens CorningFiberglass batt & blown-in insulation
- BASF FoamClosed & open-cell spray foam systems
- GreenFiber CelluloseBorate-treated blown-in cellulose
Insulation done the right way — start to finish.
Every project starts with a thorough inspection and ends with a clean home and verifiable performance gains.
Attic Insulation
Loose-fill and batt installations engineered for California Title 24 performance.
View attic insulation details
Crawl Space Insulation
Moisture-aware crawl assemblies that protect framing and improve air quality.
Explore crawl space services
Wall Insulation
Interior and exterior wall systems for quieter, more efficient living spaces.
See wall insulation options
Insulation Upgrades
Energy audits, air sealing and full-system upgrades — rebate and tax-credit ready.
Plan an insulation upgrade
Attic Decontamination
Full removal, sanitization and rodent-proofing — a fresh start before insulating.
Review attic decontamination processFederal Tax Credit
We help you claim up to 30% back via the Inflation Reduction Act on qualifying upgrades.
Check tax credit eligibilityThe standard your home deserves.
Insulation is invisible work that defines how a home feels for decades. We hold ourselves to a higher craft, and we put it in writing.
Schedule your inspection- Free, transparent estimates
No hidden fees, no upsell. Detailed scopes you can compare line-by-line.
- Licensed & fully insured
California contractor, BPI-certified technicians, full general liability coverage.
- Modern equipment
Calibrated blowers, thermal cameras and HEPA-filtered removal systems.
- Decade of Bay Area homes
10+ years insulating Victorians, mid-century homes and new construction alike.
- Same-day response
Quotes returned within hours, not days. Crews scheduled inside two weeks.
- Crew you'll trust
Background-checked technicians who treat your home like their own.
See what better insulation could save you.
Estimate what you'll save each year.
Three quick questions. Numbers use 2024–25 PG&E rates, CEC climate-zone data, and DOE / ENERGY STAR savings ranges for upgrading to Title 24 (2022) code.
Estimates only. Actual savings vary by home condition, HVAC equipment, utility rates and usage. We'll confirm exact numbers during your free on-site assessment.
View assumptions for your selections
- Home size
- 1,200 – 2,200 sq ft → 1,700 sq ft modeled
- Current insulation
- Attic ≈ R-19, walls ≈ R-11
- Title 24 (2022) target
- Attic R-38, walls R-13 + R-5 c.i. (or R-20)
- Estimated HVAC reduction
- 18% of heating + cooling load
- Climate zone
- Inland Bay (Walnut Creek, Napa) — multiplier ×1
- Baseline HVAC cost
- $0.95 / sq ft / yr (CZ12 reference)
- PG&E electric rate
- ≈ $0.45 / kWh (2024–25 avg)
- PG&E gas rate
- ≈ $2.52 / therm (2024–25 avg)
- CO₂ factor
- 3.2 lbs CO₂ / $ saved (≈65% gas, 35% electric)
Sources: DOE Guide to Home Insulation, ENERGY STAR Seal & Insulate methodology, CEC 2022 Title 24 envelope requirements, PG&E 2024–25 rate advisories, and the 2024 CEC Power Content Label for PG&E.
Reserve an on-site appointment.
Pick a weekday slot that works for you. A Johnson's Insulation estimator will arrive on time, walk the home, and follow up with a written quote within one business day.
- Monday – Friday, 9–11 AM · 11 AM–1 PM · 1–3 PM
- Live availability — booked slots disappear instantly
- Confirmation by text & email within one business day
Insulating the Bay Area & Central Valley, one home at a time.
From Oakland to Sonoma and across to Stockton, Modesto and Elk Grove, our crews travel the region with the same attention to detail and the same fixed pricing.
- Alameda
- Contra Costa
- Marin
- Napa
- San Francisco
- San Mateo
- Santa Clara
- Solano
- Sonoma
- Modesto
- Tracy
- Manteca
- Stockton
- Elk Grove
- Lathrop
- Lodi
Words from Bay Area homeowners.
"The whole crew was efficient and professional. They sealed every rodent entry point, sanitized the attic, and even vacuumed the house when they finished. Highly recommend."
"Miquan walked us through every insulation option, quoted fairly, and his team protected the home from day one. Our energy bills dropped noticeably after the install."
"Quick response, fair estimate, clean crew. Almost a year later — no rodents, no issues. Couldn't be happier."
Ready for a warmer, quieter, more efficient home?
Tell us about your project and we'll send a detailed quote within 24 hours — with no obligation and no pressure.