Best Insulation in San Francisco, California

We list insulation contractors offering energy-efficient solutions like spray foam and attic insulation in San Francisco, California. Experts are selected for experience, material quality, and proven results.

Solar Harbor Innovations logo

Solar Harbor Innovations

South Maple Avenue, San Francisco, California
4.6 (90 reviews)
  • Add to existing system
  • Solar Installation
  • Solar system installation
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Harbor Solar provides innovative home energy solutions that not only put money back in your pocket but also dramatically reduce your carbon footprint. More Detail

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Johnson's Insulation logo

Johnson's Insulation

Broadway, San Francisco, California
4.6 (49 reviews)
  • Insulation installation
  • Building energy audit
  • Wall Insulation
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At Johnsons Insulation, we pride ourselves as being the best technically sound insulation services for attics, crawlspaces and walls in Alameda, Contr More Detail

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Rhino Siding & Window Replacement logo

Rhino Siding & Window Replacement

Girard Street, San Francisco, California
4.7 (12 reviews)
  • Casement Windows
  • Single and Double Hung Windows
  • Specialty Windows
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Rhino Builders is a company that prides itself on providing top-tier window installations, exterior siding, and other home improvement services that s More Detail

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SDI Insulation Inc logo

SDI Insulation Inc

Lang Road, San Francisco, California
4.6 (186 reviews)
  • Commercial Insulation Services
  • Spray Foam Insulation
  • Insulation Removal
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We are the San Francisco Bay Area’s insulation and fireplace experts and ultimate resource for Building Efficiency Expertise. More Detail

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Giants Restoration logo

Giants Restoration

Geary Boulevard, San Francisco, California
0.0 (0 reviews)
  • Sawage cleanup
  • Mold remediation
  • Storm damage restoration
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We are a restoration company dedicated to helping every household achieve a peaceful place to live in. We have been serving the areas of San Francisco More Detail

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Temper Insulation Co., Inc. logo

Temper Insulation Co., Inc.

Folsom Street, San Francisco, California
0.0 (0 reviews)
  • Firestopping
  • Mechanical Insulation

With over 20 years in the business, Temper Insulation Co., Inc. is your go-to solution for Mechanical Insulation and Firestopping systems. Based in th More Detail

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Soundproofing Remodelers San Francisco Bay Area logo

Soundproofing Remodelers San Francisco Bay Area

30th Avenue, San Francisco, California
3.0 (2 reviews)
  • Soundproofing Consultation
  • Soundproofing Remodeling
  • Soundproofing Installation

Bay Area Noise Control Soundproofing Remodelers (License Contractor No: 916001) is a team of acoustical consultants, specialty noise material supplier More Detail

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Bay Area Noise Control | Soundproofing San Francisco logo

Bay Area Noise Control | Soundproofing San Francisco

30th Avenue, San Francisco, California
4.1 (70 reviews)
  • Studio and Music Room Soundproofing
  • Commercial Soundproofing
  • Residential Soundproofing

Bay Area Noise Control is a local soundproofing company that's been serving San Francisco and the Bay Area for over thirty years. We're a licensed aco More Detail

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21ST CENTURY HOME IMPROVEMENT PAINTING & ROOFING logo

21ST CENTURY HOME IMPROVEMENT PAINTING & ROOFING

Church Street, San Francisco, California
2.7 (30 reviews)
  • Interior wall painting
  • Painting interior elements
  • Kitchen & Bath Remodel
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We are a local, family-owned and operated General Contractor specializing in residential home improvement projects, including the following services: More Detail

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Frequently Asked Questions

Insulation reduces heat loss in winter and heat gain in summer, making your home more energy-efficient and comfortable. It also lowers energy bills and improves indoor air quality.

It depends on the area:

  • Fiberglass batts – Common for walls and attics.
  • Spray foam – Provides airtight sealing for attics and basements.
  • Blown-in insulation – Great for hard-to-reach areas.
  • Rigid foam boards – Ideal for exterior walls and basements.


Most insulation lasts 20–100 years, but it may need replacement sooner if it gets damaged by moisture, pests, or settling.



Signs include uneven temperatures, high energy bills, drafts, and cold walls or floors. A professional energy audit can determine if your home needs more insulation.

Costs vary based on insulation type and home size, ranging from $1,500 to $5,000. The savings in reduced energy costs make it a great long-term investment.