Independently Rated Highest in Quality
T h i r d                              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 is a full-service insulation contractor with over three decades experience working residential and commercial projects. Steve De Lorenzi has been in the construction industry for 37 years. Much of that time has been spent finding ways to conserve energy and improve comfort via proper use of insulating materials. Steve's environmental concerns have encouraged him to 'go green.' His vision for SDI Insulation includes becoming California's leader in 'green building' applications.

You probably don't give much thought to your home's insulation. But you'd sure notice if it wasn't there. The fact that it keeps your environment more comfortable is just the beginning. Along with its thermal performance, insulation reduces the cost of utility bills, lessens noise and helps prevent mold and mildew caused by moisture accumulation. It can also have an effect on air sealing and airflow, thus maintaining indoor air quality.

There are many types of insulation and many applications. SDI works with fiberglass batt insulation, loose-fill fiberglass, cellulose insulation and spray foam. They're California's only licensed dealer of the Icynene Spray Foam Insulation System and are also a Certified Blown-In-Blanket System contractor. SDI would be happy to evaluate your current situation and recommend the most beneficial type and amount of insulation.

Company Philosophy

“We are a service-oriented company. Our crews have an outstanding record of quality service and attention to detail. They’re knowledgeable, professional and take pride in their work. We’re constantly looking for better products, better installation techniques, and more ways to serve and reward our customers.”
Serving the San Francisco Bay AreaFiberglass, Loose Fill
& Spray Insulation
New Construction
& Remodels
Residential & Commercial
Findings based on statistically reliable research from 125 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.
93%
n = 125

Diamond Certified Qualification

Based on 125 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

"They were prompt, cordial, and they stuck to the original bid."

–H.C.

"Everything, getting the estimate, the way they did the job, the quality of their work, and the way they cleaned up the jobsite, I was very impressed. They were polite, professional, and on time. I was very happy. I have already referred them to several of my friends."

–Angelica K.
Research conducted by American Ratings Corporation. Ratings Methodology

Company Capabilities Table

SDI Insulation, Inc.
(650) 685-5500
Mon - Fri:
6:30am - 6:30pm
Serving the San Francisco Bay Area
607274
Liability Insurance, Worker's Compensation
Blown-In-Blanket System
Icynene Spray Foam
Insulation System
Steve De Lorenzi, President and CE