Greenshield Insulation

Greenshield Insulation handles insulation jobs out of San Jose and the wider Bay Area. They focus on attic insulation and removal, wall insulation, crawl space insulation, air sealing, radiant barrier work, solar attic fan installation, and commercial insulation. The company lists service across San Jose, Santa Clara, Morgan Hill, Sunnyvale, Mountain View, Cupertino, Palo Alto, Los Gatos, Campbell, Milpitas, Fremont, Gilroy, Menlo Park, Redwood City, and San Mateo. They operate daily from 9 in the morning until 7 at night and state they will beat any written competitor quote by 10 percent.

Homeowners call them for attic replacements, wall insulation to fix hot and cold rooms, crawl space and garage insulation, and full home upgrades after new HVAC installs. Reviews mention Abbas providing clear quotes and explanations, Ahmad guiding material choices like foam, Rockwool, and R15, and Dave handling blown-in work. Crews remove old insulation, blow in new material to R44 levels, patch holes, and address temperature swings or sound issues between rooms. Jobs often finish in a few hours or over two days, with before and after photos provided in some cases.

They show up on time, communicate clearly with the office and on site, and keep pricing competitive without extra charges for overhead. Reviewers note the crews prep spaces, work efficiently with multiple people on one house, and clean thoroughly using negative pressure vacuums. The company works with BayREN for rebates on qualifying insulation and stays flexible on scheduling. Service covers the listed Bay Area cities with the same daily hours.

Customers repeatedly mention solid workmanship, noticeable drops in heating and cooling costs, better indoor comfort, and clean job sites. All listed reviews give five stars and highlight professional crews plus responsive office support. DIRT Score 4.3 from 20 reviews on Finds.

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“I had my attic insulation replaced and got my interior/exterior walls insulated with Greenshield. Abbas gave me a good quote and clearly explained the process and what I could expect. His crew was professional, respectful, and competent. They got the job done in the expected time. No complaints, would wholeheartedly recommend Greenshield.”

“We had them install foam, Rockwool, and R15 insulation. Ahmad was excellent at guiding us on which product to use where. The team did an excellent job of insulating our home. We are very happy with their responsiveness, quality of work, and price.”

“As a first-time homeowner, I have a lot to learn, but I knew for sure that our house was abnormally hot in the summer and freezing in the winter. When the team came out to inspect, they were incredibly kind and understanding. They thoroughly explained their recommendations and patiently broke down why batting insulation wasn't the right fit for our home. They also offered wall insulation which was what we were also looking for as our south facing walls always felt warm to the touch in the summer. We ended up hiring them, and they completed the entire job in just a few hours. I wanted to wait a few weeks before writing this, and I can now confidently say they did a fantastic job! The house feels significantly cooler and much less humid. (Keep in mind we had zero insulation before, so results might vary if you already have some old insulation). We'll see how it holds up this winter, but for now, I highly recommend them. To top it off, they gave us the most affordable quote by far—and it included the wall insulation, whereas other companies charged more just for the attic!”

“Working with Greenshield was a great experience from start to finish. Booking the attic insulation was straightforward, and the pricing was great. The installers were courteous, organized, and respectful of my home, which made a big difference to me. After seeing the results, I hired them again a few months later to insulate the exterior and interior walls for sound control. The improvement was immediate — noise from the other bedrooms is no longer an issue like it was before. On top of that, my heating costs have dropped noticeably since the work was completed. I honestly wish I had done this sooner. I’m going to recommend this company to my friends and family.”

“Greenshield installers added insulation in my attic, they were timely, professional, and performed excision services, and took before and after pictures for me to see their work. Communication with front office was very responsive, and flexible. Thank you to all involved on my job.”

“Greenshield deserves 5 stars. 1. They are very flexible to work with. 2. Sounds professional throughout the project. 3. Keep up to their promise. 4. Workmanship is excellent: I replace my attic insulation and air duct system to help me with my allergy problem (I remove insulation, next install new HVAC system, finally install insulation. I have abestos removal, so this is the best sequence for me.) - They clean very well. Using negative pressure vacuum, they suck and remove all the junk, blown in, batt and left nothing behind. I personally went up to inspect their cleaning after they were done. (I pay extra attention to the cleaning process because I don’t like the musty smell of an old house. I have allergy, so air quality is important to me. They also sprayed to disinfect the attic.) - Installation is very good. They put back brand new thick R38 insulation beautifully. They reach even the furthest corner. Every part of the attic is covered. 5. They stand behind their work. I am glad to deal with Greenshield. I have no headache or hiccup in the entire process. As a regular home owner, I have zero knowledge prior to this. 6. They have rebates, so at the end their price is comp”

“I had Greenshield do R-44 blown-in insulation on my attic after getting a heat-pump HVAC installed (by a different contractor). It takes a couple of hours and they have several people working on a single house at one time. All of them, especially Ahmad and Dave were very professional. They prep your place and clean up after also. They have the process down pat and it seems like they've been doing this for a long time. This appears to be confirmed by their years in service in the bay area. They are also in contact with BayREN which provides Bay area rebates for green improvements to your home. R44 is the minimum required to qualify for the BayREN incentive. They handle the inspection and submitting of this rebate and all you have to do is wait for your check back. The price is reasonable and the work is definitely high quality. Because we have a newly installed heat pump with a smart thermostat we can quantitatively say that the R-44 blown in insulation makes a measurable difference into how much our heating system is running. I'm looking forward to seeing if there are improvements for the AC during summer as well. The insulation is definitely worth it for saving a few extra kwh if ”

“My home had a vast temperature swings and the HVAC was under load to keep up. So I decided to upgrade our attic insulation and also install wall insulation for our home. I took quotes from 3-4 companies and Greenshield prices were very competitive. They did not overcharge and not one of those greedy companies who charge their customers for their high overhead costs. Ahmad was extremely easy to work with, straightforward, cooperative, kind and provides great customer service. The installation went well, quality work, they patched up pretty good too. I can make out a significant difference in the temperature inside the home now. Totally worth it and I guess I should have done this sooner. I am eager to see my next PG&E bill for some savings.”

“I'm pretty happy with the insulation work. The room above my garage had cold floors so Greenshield punched holes on the garage ceiling drywall, blew in several bags full, and patched up the holes and cleaned up everything afterwards. They showed up on time, did very clean work, was very professional and most importantly the outcome was great. The room floor is no longer cold and the house is better insulated than before. The price was very competitive and they knew exactly what to do. Highly recommended.”

“I had Greenshield come out about 3 weeks ago to compete the insulation for my home. Prior to the work, I had 5 total companies come out to give me an estimate. I ultimately chose to go with Greenshield because of the professionalism and overall Experience during the estimate process. I chose to have my attic insulation removed and replaced. Along with my walls having insulation blown into them. He assured me the entire process would take only 2 days. On the first day, they came and cleaned the attic up pretty quickly. And day 2 they came and insulated the attic and walls. The crew was polite and very efficient with their work and finished up the work faster than the estimated times. Overall experience was great with both ahmad during the estimate and the crew during the installation process. After 3 weeks of having the new insulation I can definitely say it’s made a big difference in the homes comfort. I will recommend Greenshield to family and friends and rate their service as a 5 star.”

“From Day 1, I met with Ahmad and he is very friendly and professional. Ahmad introduced the service in details, and started the process very smoothly. The working crew has been doing an excellent job, and I am happily continuing to work with the Greenshield team for the rest of my house. I strongly recommend Greenshield to do insulation work.”

“I worked with Ahmad and team to have some extra insulation done in my attic and a full insulation in my crawl space and Garage. They are very professional in their commitment and have done an excellent job. I would definitely recommend Greenshield for all Insulation needs.”

“Green shield service is great. They had the lowest price and best service. Ahmad is knowledgeable and professional. I would highly recommend this company to anyone who needs insulation work.”

“Fantastic job done for my blown in insulation. We recently opened a perimeter wall for remodeling and found the insulation being dense and well filled into every gap. Communication was easy. Price was extremely fair.”

“Great customer services super clean work grateful for the wonderful work the crow did. Owner very professional great pricing appreciate all the effort to make sure work was done is timely manner thank you green shield .”

“A few weeks ago I insulated two apartments with Greenshieid. Ahmad was extremely helpful, transparent, and professional. I highly recommend Greenshield. Thank you Ahmad!”

“Very satisfied with the workmanship & materials that were used. Ahmad & staff were very friendly nice and professional.”

“We are really happy with the outcome! From the initial consultation, Ahmad was thorough, explained the details and answered all our questions. The service was quick and the team has done a good job!”