Quieter rooms, warmer walls.
Most pre-1980 Bay Area homes have little or no wall insulation. We retrofit existing wall cavities with dense-pack cellulose or injection foam — no demolition, no mess, dramatic results.
Licensed · Insured · BPI Certified · CSLB Lic. #1051108
Benefits of a properly insulated home.
- Up to 70% reduction in street and room-to-room noise
- Eliminates cold-wall drafts in winter
- Stops summer heat from radiating indoors
- No drywall demolition required
- Improves overall envelope tightness
- IRA tax credit eligible
Methodical from inspection to cleanup.
- 01
Wall assembly assessment
We borescope a sample cavity to confirm what's in your walls and check for obstructions, wiring or moisture.
- 02
Access planning
We choose interior or exterior access points based on finishes — typically 2" holes between studs that are patched after install.
- 03
Dense-pack install
Cellulose is blown to 3.5 lb/ft³ — the density that prevents settling and creates the sound-dampening monolith.
- 04
Patch & finish
Holes are plugged, taped, and textured to match. Final walk-through with thermal imaging to verify complete fill.
Exactly what happens at your appointment.
Every visit follows the same checklist so nothing is skipped — and so you know exactly what your crew is doing, when.
- 0120–30 min
Arrival & walkthrough
- Confirm wall sections to be insulated and finish color for plug patches
- Protect floors, furniture, and landscaping with drop cloths
- Locate studs, fire blocks, and any plumbing or wiring in target walls
- Mark hole locations with low-tack tape — review with you before drilling
- 0230–45 min
Inspection & moisture check
- Borescope inspect 2–3 wall cavities to confirm they're empty and dry
- Moisture-meter siding and interior drywall around bathrooms & kitchens
- Thermal scan exterior walls for cold spots and existing insulation
- Photograph any pre-existing siding cracks or stucco damage
- 033–5 hrs
Drill & dense-pack install
- Drill 2-inch access holes between studs at top and mid-height
- Dense-pack cellulose to 3.5 lbs/ft³ — verified by hose pressure
- Move bay-by-bay so no wall is left open overnight
- Probe-check fill density at random bays before patching
- 041–2 hrs
Patch & finish
- Install matching siding plugs or stucco patches in every hole
- Sand and texture-match stucco patches to surrounding finish
- Touch-up paint or mark patches for your painter (your choice)
- Caulk plug edges so they're weather-tight
- 0520–30 min
Cleanup & sign-off
- Sweep & blow off siding, walkways, and landscaping
- Walk the exterior with you to inspect every patch
- Provide install diagram showing every drilled bay
- Email Title 24 certificate and 1-year workmanship warranty
The right material for your home.
Dense-pack cellulose
Our go-to for retrofits. Vapor-open, sound-dampening, and proven on Bay Area homes for decades.
Injection foam
For cavities where higher R-value per inch matters. Self-leveling and ideal for irregular wall shapes.
Mineral wool batts
Used when walls are open for remodel — fire-rated and excellent at sound control between bedrooms.
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.
Questions, answered.
Don't see your question? Call us at (510) 660-0455 or request a free estimate.
Pick a time — we'll be there.
On-site visits are free and take about an hour. Choose any open Monday–Friday slot in the next two weeks; booked times disappear from the picker in real time so you never double up.
Tell us about your home — we'll handle the rest.
Fill out a few details and a Johnson's Insulation estimator will reach out within one business day to schedule a free on-site assessment.