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TRUSTED BY PENNGROVE, CA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon23
    Verified insulation services reviews

Top-Rated Insulation pros in Penngrove - Updated Nov 2026

Avatar for Redwood Insulation
Redwood Insulation
4.9(
16
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Penngrove, CA and surrounding areas

Approved

In business since 2018

Free estimates

Customers say: Quick response

"Matt was very good about keeping all appointments and very friendly. His work on the insulation was nice and neat and very effective. Good adhesion in all surfaces, and he even made a special trip back on our small job to finish insulating several windows. Matt gave the best service and best product of all the contractors I’ve had to hire in the last year. We may ask him to come back and insulate the rest of the garage!"
Response time2 days
9 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Eagle Shield
Eagle Shield
4.3(
18
)
Batt, Rolled or Reflective Insulation - Install or Upgrade

Serving Penngrove, 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
7 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Coast Building Products
Coast Building Products
4.5(
14
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install+1 more

Serving Penngrove, CA and surrounding areas

Approved (Corporate)

In business since 1950

Free estimates

Credit card accepted

"Estimator Cruz was professional, on time, excellent with communication and patient with all my questions and explained my options very well. Thank you Cruz! Tom and Jose who came to install my insulation where very professional, clean, on time and did an excellent job! I highly recommend Coast Building Products!"
Spary foam rooof line
Batt installatoin
Applying Spray Fiam
Response time8 hrs
Response rate100%
27 neighbors recently requested a quote
Avatar for Attic Masters
Attic Masters
4.7(
33
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Penngrove, CA and surrounding areas

In business since 2010

Free estimates

Credit card accepted

"Ron and the crew that came worked very hard installing the radiant barrier. They were polite professional and at the end of the day they cleaned up any debris that fell from the attic. My husband and I were very satisfied with all aspects of the job done by Attic Masters. Thankyou so much!"
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+7

Recommended by95%of homeowners
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Insulation FAQs, answered by experts

Insulation is professionally installed by measuring spaces, cutting materials to fit correctly, and placing them without gaps for optimal thermal resistance.

If you feel your energy bills are too high or your HVAC system is working harder than necessary to maintain the correct temperature in your home, you may have an under-insulated home. If you’re unsure, consider having your system’s efficiency assessed by a local independent energy auditor.

Yes, products made from renewable resources and with reduced chemical impacts.

No, 55 degrees Fahrenheit is not too cold for a house, as it’s a temperature that will keep your pipes and appliances from freezing. Well-insulated homes can even go to 50 degrees, but check with an HVAC pro before opting for such a low temperature. Stick to 55 degrees to be on the safe side.

R-value stands for resistance value and is a number assigned to insulation that states how good the insulation is at heat transference (insulation). The R-value of injection foam is around 4 which homeowners will be happy to know is actually quite good. Another benefit of injection foam versus fiberglass foam is that the colder it gets, the more injection foam retains its resistance properties, whereas fiberglass tends to lose its efficiency in colder temperatures.

The Penngrove, CA homeowners’ guide to insulation services

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