Top-rated insulation pros.

Get matched with top insulation pros in Castro Valley, CA

Enter your zip and get matched with up to 5 pros

Need a pro for your insulation service project in Castro Valley, CA?

Select your specific project to find the pro for you.

TRUSTED BY CASTRO VALLEY, CA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon88
    Verified insulation services reviews

Find Insulation pros in Castro Valley

Bay Valley Insulation Inc
4.7(
46
)

Serving Castro Valley, 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 I originally made the request in August and this morning on Nov 10, I got a phone call inquiring if we still needed insulation done.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 Castro Valley, 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
68 neighbors recently requested a quote
Recommended by99%of homeowners
Avatar for Greenshield, Inc.
Greenshield, Inc.
4.6(
96
)

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2013

Free estimates

Warranties offered

"This is an awesome company to do business with. They are honest, reliable, and do an outstanding job. My insulation was very old and my upstairs had become unlivable because it was so hot. I sought out 3 bids and I decided to use this company because of the outstanding experience I had in working with them. The person who took my call was very helpful, courteous and warm. They came out right away to inspect and give an estimate. They did not try to upsell and I felt very comfortable in what they said I needed. The installers arrived on time, got the job done, were super conscientious and efficient. I cannot say enough about what a great company this is. My house feels so much better. Do not hesitate to contact them if you need insulation and you will not be sorry."
Response time8 hrs
31 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Eagle Shield
Eagle Shield
4.3(
18
)

Serving Castro Valley, 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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+9

Response time7 hrs
1 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Attic Experts, Inc.
Attic Experts, Inc.
4.7(
45
)

Serving Castro Valley, CA and surrounding areas

Approved

In business since 2012

Free estimates

Small jobs welcome

"Attic Experts pulled out our old insulation and installed new. Since then, we've certainly noticed a positive difference in how well the house keeps cool in summer and warm in winter."
 Droppings
 Droppings
 Droppings
 Old Insulation
Old Insulation

+13

Response time7 hrs
1 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Attic Pros
Attic Pros
4.7(
101
)

Serving Castro Valley, 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%
15 neighbors recently requested a quote
Avatar for Atticare Construction
Atticare Construction
4.5(
172
)

Serving Castro Valley, 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 Castro Valley, 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
...
Showing 1-10 of 86
Insulation questions, answered by experts

Insulating ductwork improves your HVAC system's energy efficiency by protecting the air from external conditions and preventing energy loss as it travels through the ducts. This means your system doesn't have to work as hard to heat or cool your home, leading to lower energy bills and a reduced carbon footprint. Additionally, insulated ducts help maintain a more consistent and stable indoor temperature, enhancing comfort. Proper insulation also improves indoor air quality by reducing the entry of allergens and pollutants and helps prevent problems like condensation and mold formation within the ductwork.

Closed-cell spray foam insulation itself serves as a vapor barrier (or vapor retarder). However, you may need to install a vapor barrier if you have open-cell spray foam insulation. When in doubt, work with a professional insulation contractor, as they can provide more detail about the specific needs of your home in your climate.

Adding insulation to ceilings is an excellent way to increase the energy efficiency of your home. If your home's layout is such that you need insulation in the ceilings rather than in the roof, it's likely that at least some insulation already exists in the space. However, each additional inch of insulation you can add boosts the R-value by between 2.2 and 4.2.

Pipes in your house can freeze after six hours or so if you lose power and temperatures are below freezing. You can prepare for potential power outages by winterizing your pipes with insulation. Also, whenever temperatures drop below 20 degrees Fahrenheit, turn your faucets on very low and leave them dripping until temperatures rise.

Durable materials suited for climate include aluminum for coastal areas or composite wood in varying environments for durability and minimal upkeep.

The Castro Valley, CA homeowners’ guide to insulation services

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