Central Bay Roofing & Restoration
“I also liked that they took photos at different stages of the job and shared with us.”
Best Insulation Contractors in Alameda, CA
15 contractors listed · 4 in Alameda · 8 open weekends · all 15 rated 4.5+ · 8 show a license
Data verified October 18, 2026
Adam Roofing
“They were keen and quick to evaluate the project, get the needed permits and materials, and made it easy for us - stress-free.”
Western Painting & Improvements
“They have painted our exterior twice and our interior once, we would definitely use them again.”
Bay Roofing Co
“Michael the owner Of bay roofing looked at my roof, gave me his recommendations and a price quote.”
Attic Pros
“Ahmad was probably the best project manager I've ever worked with and he stayed with us through the entire process.”
Century Roof and Solar
“Tony and his crew did a great job with my new roof which was done over 13 years ago and still looks great!”
The 15 contractors listed for Alameda, CA insulate attics, walls, crawl spaces and rim joists. Details under each one about materials, hours and the services advertised are copied from the company's own site; star ratings and comments come from public reviews.
Area overview: Alameda, CA
4 of the 15 contractors we list are based in Alameda; the other 11 serve Alameda from towns including Oakland (3 mi), San Francisco (10 mi) and Berkeley (7 mi). The contractors on this page are rated from 4.7 to 5.0 across 2,601 reviews; 6 have 50 or more reviews. When customers rate these contractors on specific qualities, they most often praise professionalism (87%), responsiveness (87%) and quality (84%). The topics that come up most in reviews of the contractors on this page are "price", "estimates" and "cleanliness". 8 are open on Saturdays and 3 on Sundays. The services the contractors on this page list most often on their websites are rodent proofing (3), attic insulation (2), crawl space cleaning (2) and gutters (2). 8 show a license on their websites and 6 have a BBB rating of A or A+. 8 have ten or more years of experience, the longest 44 years. 1 offers financing or payment plans; 10 give free estimates; 6 are family- or locally-owned and 2 list coupons or special offers. We count these figures across the contractors on this page; distances are straight-line, and hours and prices change, so confirm the details with the contractor before you book.
How many listings here have a website?
A website is on file for all 15 contractors here. Use it to see which materials they actually install, since a firm that only sprays foam will recommend foam. A contractor with no site is not automatically worse, but you will have to ask on the phone what the site would have told you.
Element Home Solutions
“I felt the Heater / AC unit are good quality, and all the men who came for the installation did an excellent job, and were very respectful of the property.”
Alley Cat
“Alley Cat techs are professionals who take the time to do the job right and carefully explain what they've done.”
American Attic
“It was wonderful to do business with a responsive owner who takes personal interest and pride in doing good work at a good price.”
Master Roofing Company
“Needless to say, we have continuously used Master Roofing since then, to the point that we don't bother to get competitive bids from any other roofer.”
Ace Roofing
“He's always responsive, dependable, and he's great with follow through It's nice to work with a contractor that I can rely on.”
Wonderlin Roofing Systems
“I recommend talking to them to understand your options and pricing since I think they are pretty reasonable and professional.”
Foam Roof Solutions
“The on-site team: Alex, Coach, AJ and Junior were hard-working, polite, friendly and really worked with us above and beyond to ensure we are happy with their service and the final outcome.”
Berkeley Roof Services
“Feels good knowing Berkeley Roof Services/West Co has my roofing covered!”
USA Spray Me Spray Foam Insulation Contractor
“I got new flooring and drywall installing done which I was holding back on.”
Why these companies made our list
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