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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.
“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
Loose Fill & Spray Foam Insulation
New Construction & Remodels
Residential & Commercial
Applicator of Green Insulation Products
Energy Centrix Showroom
"They were reliable.""I liked that they showed up on time and completed the work on time. It was perfect."
"The quality of the work was good.""I liked the quality of the work for the price we paid."
"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."
"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."
"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."
"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."
"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."
"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."
"They were very efficient, clean, and it was a great service.""My house is warmer now."
"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."
"They are responsive, on time, and have great follow-through.""The great service and promptness"
"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."
"They were on time, they got everything done pretty quickly, and they cleaned up after themselves.""They worked according to schedule."
"They were excellent at the job they did, quick, efficient, and clean.""I like that they are on time and efficient."
"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."
"It was quick, easy, and they were very efficient.""They completed the project as promised with the price and time."
"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."
"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."
"They were down to earth.""They came in and said what they could do and they recommended a cheaper way to do it."
"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."