Independently Rated Highest in Quality
N i n t h
Consecutive Year
Originally Earned:
February 2008
We declare that SDI Insulation, Inc. HAS QUALIFIED for and continues to meet the Ongoing Research and Rating Requirements for Diamond Certified® status.
Certificate #1276
(650) 685-5500

SDI Insulation’s air sealing services result in huge energy savings for its clients.

SDI Insulation, Inc. is a full-service insulation contractor providing attic, wall, and floor installations for residential and commercial customers throughout Northern California. As an insulation industry leader, the company offers a complete line of insulation applications, including batt, blown (fiberglass and cellulose), spray foam and noise reduction solutions. Other services include insulation removal, high-efficiency fireplaces, inserts, solar installation and home performance/energy rebate consultations.

President/CEO Steve De Lorenzi is a Sustainable Living insulation contractor who has helped builders, city officials, building departments and building inspectors improve their understanding of how to construct sustainable living environments. Mr. De Lorenzi has more than 35 years of experience in the insulation industry, and he’s also a San Francisco Residential Energy Conservation Ordinance (RECO) Inspector.

SDI Insulation strives to stay at the forefront of advancements in Green technology, building sciences and code requirements. The company partners with LEED Certified manufacturers and can assist in bringing homes up to new environmental codes. It also conducts home energy audits, provides state-of-the-art spray foam and air sealing packages for newly constructed and existing homes, identifies cold spots in homes by using cutting-edge thermal imaging technology, and more.

Company Philosophy

“We’re a service-oriented company, and we value our customers in the highest regard. Our estimating department advises our customers on the best insulation solutions for their projects at price points that make the most sense for them. Our office staff is available to answer any scheduling or billing questions. We learn from each job and take that experience to the next project.”

Serving San Francisco Bay Area Counties, including San Mateo, Monterey, Napa, Sonoma and Marin

Fiberglass
Loose Fill & Spray Foam Insulation
New Construction & Remodels
Residential & Commercial
Applicator of Green Insulation Products
Fireplaces
Solar
Home Performance
Energy Centrix Showroom

Findings based on statistically reliable research from 200 surveys

Customer Satisfaction

Survey Question: On a scale of 1 to 10 how satisfied were you with the quality you received?
Chart.

Company Credentials

Workers Compensation
Liability Insurance
License Verification
Business Practices
Current Complaint File

Customer Loyalty

Survey Question: If you needed this product or service in the future, would you use this company again?
Chart.
96%
n = 200

Diamond Certified Qualification

Based on 200 customer surveys, we declare
SDI Insulation, Inc.
has passed all rating steps and has earned
The Diamond Certified Award
No. 1276
Continuously qualified since February 2008.
David Pak
Director of Ratings Research
American Ratings Corporation

Verbatim Survey Responses From Only Verified Customers

Mike L. Verified Customer Name
"I liked that they showed up on time and completed the work on time. It was perfect."
Research conducted by American Ratings Corporation. Ratings Methodology

Diamond Certified® Video Profile

Company Capabilities Table

SDI Insulation, Inc.
(650) 685-5500

Mon – Fri: 7am – 5pm

Serving San Francisco Bay Area Counties, including San Mateo, Monterey, Napa, Sonoma and Marin

Steve De Lorenzi, President and CEO
Bayer MaterialScience LLC (BMS) Silver Certified Contractor, BPI GoldStar Contractor, Energy Upgrade California Contractor, Residential Energy Conservation Ordinance (RECO) Inspector
607274
Liability Insurance, Workers' Compensation
California Building Performance Contractors Association, Efficiency First California
Fiberglass, Loose Fill & Spray Foam Insulation; New Construction & Remodels; Residential & Commercial; Applicator of Green Insulation Products; Fireplaces; Solar; Home Performance; Energy Centrix Showroom

Photo & Video Gallery

Survey Responses For

SDI Insulation, Inc.

SDI Insulation, Inc.: Average 8.8 out of 10 based on 200 unique customer surveys of customer satisfaction.
Mike L. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were reliable."

"I liked that they showed up on time and completed the work on time. It was perfect."

Roem B. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"The quality of the work was good."

"I liked the quality of the work for the price we paid."

Alison S. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They're very accommodating. I live in a hard to reach area and they were able to come to my house very quickly."

"I liked their efficiency."

Ameya T. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I think they really did a good job putting in the insulation and they were very professional."

"I liked that they were very professional and that the quality of the product was good."

Sheila S. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They're certainly very good at what they do and they're around for any kind of follow-up that you may need. They stand behind their products and their work."

"We liked that they were very prompt, that whatever they told you they actually did, and that they did it in a reasonable time frame. They were really excellent and very nice to deal with."

Berry C. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They are professional, on time, and just very neat and organized."

"I am a contractor and they always take care of my jobs. Whenever I call them, they get right on it. I have been using them for 20 years."

Dave M. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They did a good job, they were really competitively priced, thorough, and I liked working with them."

"I liked that their recommendations were good, that they were thorough, and that they followed up with me to make sure everything was okay. I did not need anything else from them."

Diana C. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I've recommended them a couple of times to other people. I like that they're a local company."

"I like the woman who gave me the bid, that they're local, and not too slick or glossy. I also liked that they showed up on time, did the work I needed and that my house is warmer."

Emily W. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were very efficient, clean, and it was a great service."

"My house is warmer now."

Fred R. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I would highly recommend them. They did a good job. Matt was very knowledgeable, helpful, and he explained everything they were going to do. "

"The workmanship was very good, and they did exactly what they said they would do."

Gary E. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They are responsive, on time, and have great follow-through."

"The great service and promptness"

Gus M. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"If they need insulation, give them a call."

"They are the only people I have used since 1993/1994. Their prices are great, they have good service, and they are prompt. They find a way to please you and they do it when they say they will."

Jae F. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were on time, they got everything done pretty quickly, and they cleaned up after themselves."

"They worked according to schedule."

Jerry D. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were excellent at the job they did, quick, efficient, and clean."

"I like that they are on time and efficient."

Kathleen D. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I highly recommend them."

"They did my wall and ceiling insulation. They were great and I will use them again. Everything was great and they came highly recommended to me. They were professional and I was satisfied with them. They did what they said they would do and the house is warmer."

Mary O. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"It was quick, easy, and they were very efficient."

"They completed the project as promised with the price and time."

Mike S. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They did what they said they were going to do."

"They showed up, did their job, didn't make a mess, and they cleaned up after themselves."

Nigel P. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They are very knowledgeable about how to best insulate your house."

"The things that I learned from them in terms of what to use, the main guy who did the ordering was really good, but I don't remember his name."

Noreen W. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were down to earth."

"They came in and said what they could do and they recommended a cheaper way to do it."

Richard E. Verified SDI Insulation, Inc. Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"For me, it is a lot cheaper to have a blown-in insulation than taking your walls out. It is a great service."

"Their prompt service, they do what they say they are going to do when they say they will do it, and their customer service is good. They have a reasonable price. I think they are doing a good job."