Blown-In

Blown-in insulation in San Diego.

Blown-in is the workhorse for retrofits. Cellulose or fiberglass loose-fill goes into attics fast and cheap. Dense-pack cellulose fills closed wall cavities through small drill holes. Both approaches finish to the R-value the code or your envelope plan calls for, with no thermal bridging gaps.

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Insulation crew running a hose into an attic to blow loose-fill cellulose

What's included in this service?

Cellulose or fiberglass loose-fill for attics
Dense-pack cellulose for closed wall cavities (drill-and-fill)
Truck-mounted blowers for proper density and reach
Pre-blow air sealing of penetrations
Baffle installation at eaves to protect soffit vents
Depth markers on rafters for inspection verification
Cleanup and HEPA vacuum of the work area

When do you need this service?

Existing attic is under R-19 and you want to top up
You bought an older home with no wall insulation
You hear a clear difference between rooms on opposite sides of the house
You are doing a stucco redo and can pull a few cores for dense-pack
You want a budget alternative to spray foam

What do homeowners ask about Blown-In?

Cellulose or fiberglass — which is better?

Cellulose has higher R per inch, better air-flow resistance, and is recycled paper treated for fire and pests. Fiberglass is non-organic, lighter, and easier in damp climates. In dry, mild San Diego we use cellulose more often unless the attic has past moisture issues.

What is dense-pack?

Dense-pack is cellulose installed at 3.5 lb/cu ft into closed wall cavities through small drilled holes. The high density resists settling, plugs air leaks, and adds R-13 to R-15 to a wall that previously had nothing. We patch and texture before paint.

Will it settle?

Modern blown cellulose settles roughly 10 to 15 percent in attics. We blow to the marked depth that already accounts for that. Dense-pack walls do not settle when installed at proper density.

Service area

Where do we offer Blown-In in San Diego County?

We provide blown-in in every city and community in San Diego County. Pick your city for local climate notes and service specifics.

Central Blown-In in San Diego Central San Diego sits between coastal humidity and inland heat. San Diego attics typically hold 1980s or older insulation that has settled to R-15 or worse. Going to R-49 cellulose plus air-sealing is the standard upgrade and pays back in 3–5 years on cooling.

North Coastal Blown-In in Oceanside Oceanside sees marine influence and a wide age range of housing — 1970s beach stock to new HOA builds. Older homes need a full top-up to R-49 plus air-sealing; newer ones are usually code-compliant and may only need spot work.

North Coastal Blown-In in Carlsbad Carlsbad sees marine influence and a wide age range of housing — 1970s beach stock to new HOA builds. Older homes need a full top-up to R-49 plus air-sealing; newer ones are usually code-compliant and may only need spot work.

North County Inland Blown-In in Escondido Escondido hits triple-digit summer afternoons with low humidity. Attics over R-49 with proper air-sealing typically drop cooling load 15–25 percent on the hottest days. We push to R-49 minimum and air-seal the chase penetrations first.

East County Blown-In in El Cajon El Cajon attics hit 150–160°F in summer and most original tract-home insulation has settled to R-15 or worse. R-49 blown-in cellulose plus air-sealing is the standard scope and one of the highest-return home upgrades in the county.

South County Blown-In in Chula Vista Chula Vista sits in a mixed zone — coastal-influenced west, inland-influenced east. Older homes usually need attic top-ups to R-38 or R-49; newer EastLake and Otay Ranch builds are code-compliant and may only need spot work or air-sealing.

See blown-in in all 48 cities

Blown-In in Alpine Blown-In in Bonita Blown-In in Bonsall Blown-In in Borrego Springs Blown-In in Boulevard Blown-In in Campo Blown-In in Carlsbad Blown-In in Chula Vista Blown-In in Coronado Blown-In in Del Mar Blown-In in Descanso Blown-In in Dulzura Blown-In in El Cajon Blown-In in Encinitas Blown-In in Escondido Blown-In in Fallbrook Blown-In in Guatay Blown-In in Imperial Beach Blown-In in Jacumba Blown-In in Jamul Blown-In in Julian Blown-In in La Mesa Blown-In in Lakeside Blown-In in Lemon Grove Blown-In in Mount Laguna Blown-In in National City Blown-In in Oceanside Blown-In in Palomar Mountain Blown-In in Pine Valley Blown-In in Potrero Blown-In in Poway Blown-In in Ramona Blown-In in Ranchita Blown-In in Rancho Bernardo Blown-In in Rancho Peñasquitos Blown-In in Rancho Santa Fe Blown-In in San Diego Blown-In in San Marcos Blown-In in San Ysidro Blown-In in Santa Ysabel Blown-In in Santee Blown-In in Shelter Valley Blown-In in Solana Beach Blown-In in Spring Valley Blown-In in Tecate Blown-In in Valley Center Blown-In in Vista Blown-In in Warner Springs

Real feedback

Homeowners who hired us for this

We had R-13 batts from 1979 that had settled to nothing. Crew air-sealed top plates first, then blew cellulose to R-49. Upstairs bedrooms feel different now — the AC actually keeps up on hot afternoons.

Melissa R. Attic Insulation · Carlsbad

Got three quotes. Thermal Pro was the only one who recommended air-sealing before insulation and pushed for the radiant barrier given the East County heat. Bill dropped 18 percent in the first August. Worth every dollar.

David K. Attic + Radiant Barrier · El Cajon

Our vaulted ceiling was the hottest room in the house. Closed-cell foam at the roof deck completely changed the room. Crew masked everything carefully, came back to check the cure, walked us through the reoccupancy timeline. Professional all the way.

Priya S. Spray Foam Cathedral Ceiling · Encinitas

Serving San Diego County

Need blown-in in San Diego County?

Call for a free quote. Most work scheduled within the week.