We are the experts in traditional and spray foam insulation for over 40 years. Learn More


Home Performance

Schedule your SDI Home or Building Performance Test Today, call 650.685.5500 or Learn More

Home Performance


SDI Solar Energy Solutions are the Brightest Choice to start producing your own energy.



Contact SDI to update your existing wood burning fireplace with a gas/wood insert.


About SDI

Learn more about why SDI is California’s Building Efficiency Experts.

About SDI



For the past 40 years, we’ve been dedicated to helping Californians construct and retrofit super-efficient residential homes
and buildings that save money and positively impact the environment. When you want to live green and save green,
call SDI, your Building and Home Performance Specialists.

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We built our reputation as the experts in traditional and spray foam insulation over the past 30 years. We can design a sustainable envelope that reduces wasted energy and gives you a warm environment.

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SDI customers no longer have to work with two different vendors for fireplaces and insulation. We now offer a full line of traditional & contemporary, gas, and electric fireplaces to meet every style and heating need.

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Building performance is a diagnostic measurement of your home’s energy consumption, usage and efficiency. SDI Blower Door, Duct Leakage and Combustion Safety Testing are tools designed to measure the level of safety and efficiency of a building and its systems.

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Reduce energy costs, then produce your own! SDI Solar Energy can reduce your monthly energy bills by helping you manage your energy usage. SDI will design the best energy solution to keep your energy bills low.



• Licensed Spray Foam Insulation
• Batt Insulation
• Blown Loose Fill Insulation
• Blown Cavity Fill Insulation

• Blown In Blanket Insulation (BIBS)
• Building Air Sealing
• HVAC Duct Sealing
• FSK Duct Insulation

• Sound Deadening
• Home Performance Testing
• Fireplaces
• Solar Arrays and Installation

Latest SDI Insulation News
Announcing The Ramspur Winery Santa Rosa Mile

Steve DeLorenzi and SDI Insulation are proud to announce The Ramspur Winery Santa Rosa Mile. Check us out on social medi…

The CaliforniaFIRST PACE financing program just got a whole lot better!

CaliforniaFIRST is an innovative partnership between your county government and SDI that allows you to receive upfront…

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