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Castro Valley, 94546: Unlock Premier Building Efficiency Solutions in Castro Valley

With a legacy of over 47 years, our dedication has been to aid Californians in constructing and retrofitting highly efficient residential structures, delivering substantial savings and environmental benefits. Make SDI your preferred Building and Home Performance Specialists for expert guidance and sustainable living solutions.


Ready to Build Efficiency with SDI?

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Castro Valley, CA's Insulation Experts for over 47 Years!

Top Residential, New Construction, and Remodel Insulation Types for Castro Valley, CA 94546

Our Services

Residential Insulation Services

NEW CONSTRUCTION & REMODELS


Elevate your living space with our energy efficient insulation solutions, perfect for remodels, retrofits, additions, and new constructions, ensuring comfort and energy efficiency in every project.


-Spray Foam Insulation

-Blown Insulation

-BATT Insulation

-Insulation Removal

-Sound Deadening Insulation & more!


Commercial Insulation Services

Explore our comprehensive range of commercial insulation services, tailored for office buildings, retail spaces, parking garages, tenant improvements, and much more. Click here to discover the perfect insulation solutions for every commercial project, ensuring efficiency, comfort, and safety in every space.


K13 Applicator

SDI Fireplaces

Discover elegance and efficiency with our range of Gas, Electric, and Direct-Vent Fireplaces, including stylish inserts, designed to elevate your home's ambiance and warmth

Your All-in-One Insulation & Fireplaces Solution


Elevate Your Property's Efficiency with SDI Insulation, Inc.'s Proven Solutions. Count on us for superior insulation and home performance services throughout the San Francisco Bay Area, California. Our team is dedicated to delivering results that enhance comfort, reduce energy consumption, and promote sustainability.

About Castro Valley

Zip code 94546 encompasses the charming city of Castro Valley, offering a blend of suburban tranquility, natural beauty, and convenient amenities. This area is known for its scenic landscapes, including parks, trails, and open spaces that provide opportunities for outdoor recreation and relaxation. Castro Valley is home to top-rated schools, shopping centers, and community facilities, as well as cultural attractions such as the Castro Valley Library and the Castro Valley Arts Foundation. With its peaceful atmosphere and abundance of amenities, 94546 provides a desirable and family-friendly environment for residents of all backgrounds.

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47+ Years of Experience

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Pioneers in Green Building Efficiency

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The Biggest & Best Projects in the Bay

Offering a complete range of insulation & fireplaces services

Castro Valley's Most Experienced Insulation & Fireplaces Contractor

Spray Foam Insulation
Batt Insulation
Blown Loose Fill Insulation
Residential Insulation Removal
Building Air Sealing
Sound Deadening
Home Performance Testing
Green Building Codes & Efficiency
Electric & Gas Fireplaces
Rockwool Insulation
Rockwool Cavity Rock Insulation
Fireplace Inserts
Blown Cavity Fill Insulation/wall insulation
Blown in Blanket Insulation (BIBS)
Building Air Sealing

Customer Testimonials

"Excellent job from start to finish.  Our project manager, Dennis, did an excellent job addressing our concerns relative to noise and draft.  We followed his advice and are completely satisfied with the results.  The installation team consisted of 3 very capable and delightful young men who did a terrific job.  The guys worked together very well, and they were polite and professional.  The supervisor arrived to put the finishing touches on the job and the fellows cleaned up beautifully. I highly recommend SDI!"

Kathleen Willis

"The workers arrived on time.   They protected the carpet, doors, staircase carefully with thick plastic sheetings from damage by the big rubber hose.    They sucked out the old insulation material from the attic completely and cleaned up the place nicely.   Very polite and professional workers. I would recommend SDI to my friends."

Thomas Lee
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