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TRUSTED BY SAN JOSE, CA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon30
    Verified insulation services reviews

Find Insulation pros in San Jose

Bay Valley Insulation Inc
4.7(
46
)

Serving San Jose, CA and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"We needed retrofit wall insulation and after checking around all the listings through AngiesList, Yelp, and others, we found that only Bay Valley and SDI does retrofit wall insulation work. We went with Bay Valley because the price was reasonable and they responded quickly and promptly (can't say this about SDI*). Joel was our estimator and he came out promptly at the time and date indicated. He was thorough and thoughtful on how he approached the job, not overselling or recommending things we didn't need. We live in an older house and he appreciated the home and looked for the most non-invasive method to take care of our un-insulated exterior walls. Bay Valley's approach is to come in from the exterior walls with the typical 2-hole process (high/low) to blow in the cellulose insulation. They sent two guys in and despite a couple snags in the job, they finished the job in one full day. Afterwards, they plugged the holes, textured and primed, and the next day came in to paint (our-supplied) paint. I was really amazed how well and seamless it all looked afterwards. They did a good job cleaning and even moved the cabinets in the garage back where they originally were. The real result? The mornings have been a little bit warmer than last week, but so far the heater has barely turned on over the past couple days. The house already feels warmed and less temperature fluctuations. We already got brand-new attic insulation last Fall, but the wall insulation really did the trick. A definite recommend to anyone who needs a good team to do insulation in their home. * dealing with SDI was a nightmare, unfortunately. With *several* calls about being in the ER, then lots of other excuses, it just didn't seem like they wanted to do the job or something. I originally made the request in August and this morning on Nov 10, I got a phone call inquiring if we still needed insulation done. sigh."
Additional Photos
Recommended by93%of homeowners
Bay Valley Insulation, Inc.
4.6(
192
)

Serving San Jose, CA and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"Had a great experience hiring Bay Valley Insulation. The quote arrived very efficiently and was the price I was looking for. The crew of Tony and Henry arrived inside the scheduled window and work was completed in a timely manner that day. The job looked great in the blown attic and final clean-up was great. Thank you."
Response time1 day
69 neighbors recently requested a quote
Recommended by99%of homeowners
Avatar for Eagle Shield
Eagle Shield
4.3(
18
)

Serving San Jose, CA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"I love this company! Garrett came to my home and assessed how efficient our current insulation, etc was. He was very informative and friendly — explained what we needed and how they could help. At the time, I decided to hold off and he never pushed the sale. When I was ready, he was quick to accommodate my schedule. His team: Angel, Luis, Tommy and TJ were great! They arrived early, were professional, courteous, kind, very helpful with my questions and were above and beyond to help fix things that I wasn’t even aware of. They also were more than happy to help with small problems that I had no idea how to fix. They worked quickly and cleaned up afterwards. You could tell they cared about their work which makes me feel confident that the job was done right. They were also fun to have around — my Great Dane loved them too! Garrett and Dave checked in with me during and afterwards to make sure things were going well and if I had any questions. I highly recommend Eagle Shield."
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+9

Response time7 hrs
1 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Attic Pros
Attic Pros
4.7(
101
)

Serving San Jose, CA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"This company came in a updated our 40-year old home insulation with new R-38 batting. We were impressed how much attention to detail the company has for removing old insulation, clean-up, disinfection, and installing new insulation. They also replaced a damaged dryer vent in the crawlspace. Nico and Jeremy were a great combo to work with from quote through install. I plan on calling them back in spring for another project."
Fortify your home’s attic with high-quality insulation and strategic rodent-proofing.
Lock in warmth and lock out pests with expert attic insulation and rodent-proofing.
Transform your attic into a pristine, energy-efficient area with our insulation and sanitation services.
Maximize your attic’s efficiency and hygiene with expert insulation installation and sanitation services.
Create a healthier living space with expert attic insulation installation and deep sanitation.

+3895

Response time9 hrs
Response rate97%
16 neighbors recently requested a quote
Avatar for Atticare Construction
Atticare Construction
4.5(
172
)

Serving San Jose, CA and surrounding areas

Approved

In business since 2008

Free estimates

Warranties offered

"The crew arrived on time and installed plastic on the floor and walls for protection. They did a good job removing the old insulation and installing new insulation. The crew did a great job cleaning up. Nice professional job."
Before Atticare Services
After Properly Sealing the Access
After Insulation Installation
Clean and ready for Insulation Installation
After Insulation Installation

+26

Response time2 hrs
Response rate91%
4 neighbors recently requested a quote
Avatar for Insulation Alliance
Insulation Alliance
5.0(
26
)

Serving San Jose, CA and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Attic Professionals was awesome to work with and highly recommend their business for anyone looking for attic work. We hired his business to replace the insulation in our attic after I took care of a rat issue. We needed all the insulation and droppings removed, cleanse, and replace. Attic Professional crew were diligent with making sure the interior of our home was protected covering the walls and floors to remove the old insulation and did a great job installing the new insulation. Thank you for great service!!!!!!!!"
Soundproofing
Soundproofing
Attic Cleaning
Attic Cleaning
Attic Cleaning

+103

Response time2 days
Response rate93%
22 neighbors recently requested a quote
Avatar for AtticElite Insulation Solutions
AtticElite Insulation Solutions
4.6(
27
)

Serving San Jose, CA and surrounding areas

Approved

In business since 1999

Free estimates

Warranties offered

"Attic Elite is BY FAR the most professional insulation contractor. When you are looking at a major purchase (over 10k) it's good to know the contractor isn't "flying by the seat of their pants", especially when asbestos is involved."
Get $500 Off Rodent Proofing
Get $500 off crawl space cleanup.
Get $500 off rodent proofing.
Spray Foam Insulation
Before Attic Clean Up

+77

Response time2 days
64 neighbors recently requested a quote
Recommended by73%of homeowners
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Insulation questions, answered by experts

Insulation in San Jose should be checked annually for signs of rodent activity, moisture intrusion after winter rains, and settling in attic spaces—especially in homes near the foothills. Inspect around HVAC ducts and recessed lighting for air leaks, and ensure vapor barriers in crawl spaces remain intact. Upgrading insulation as new materials become available can further enhance utility savings and indoor comfort.

Helpful?

In San Jose, homeowners often overlook the importance of air sealing before adding insulation, especially in homes with older stucco or tile roofs. Failing to address gaps around recessed lighting or attic hatches can lead to heat loss. Many also underestimate the impact of microclimates and don’t upgrade crawl space vapor barriers, which can affect both thermal performance and indoor air quality.

Helpful?

Be cautious of quotes that don’t include a thorough home assessment or skip discussing San Jose’s unique climate needs. If a contractor avoids mentioning required permits, doesn’t address air sealing, or overlooks how insulation affects home comfort and ventilation, consider it a warning sign. Trustworthy professionals will explain how their work improves both energy efficiency and your home’s overall thermal performance.

Helpful?

In San Jose, attic insulation typically takes one to two days, while wall insulation in older homes—often with lath and plaster—can take three to five days due to careful prep and electrical considerations. Full-home projects, including air sealing and ductwork adjustments, may require up to two weeks. Permit timelines and contractor schedules, especially during the spring and summer, can also influence project duration.

Helpful?

Upgrading insulation in San Jose can make your home more attractive to buyers who value energy efficiency and home comfort. Enhanced insulation helps maintain consistent indoor temperatures, reduces noise from busy streets, and can contribute to lower utility bills. These improvements are especially appealing in San Jose’s tech-driven market, where eco-friendly features and improved thermal performance often boost resale appeal.

Helpful?

The San Jose, CA homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.