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Apollo Roofing Company
- Technician
- Crew
- Inspection
“Guy Israel was very professional and addressed my questions and concerns He explained the process simply and clearly with great pictures of each step of the job.”
Best Insulation Contractors in Walnut Creek, CA
24 contractors listed · 6 in Walnut Creek · 1 open 24/7 · 9 open weekends · 22 rated 4.5+
Data verified October 18, 2026
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Eco Performance Builders
- Water Heater
- Questions
- Project
“They had to work both in a tight, hot attic and also outside three stories up, while moving heavy equipment around everywhere -- all the while being really friendly and understanding that they were in someone's home.”
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Aircom
- Price
- Inspection
“In addition, after getting several bids for this job, Aircom was the most willing to work with me on price in these hard times and I felt they were fair and delivered a good job.”
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Brick & Hammer
“But instead he was straightforward and told me what I needed help with and what I could do myself.”
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Bay Valley Contractors
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First Choice Construction
The 24 contractors listed for Walnut Creek, 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: Walnut Creek, CA
6 of the 24 contractors we list are based in Walnut Creek; the other 18 serve Walnut Creek from towns including Oakland (12 mi), Concord (5 mi) and Pleasant Hill (4 mi). 23 of the contractors on this page have a rating, from 4.3 to 5.0 across 3,798 reviews; 10 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (91%), quality (88%) and responsiveness (82%). 1 is open around the clock; 8 are open on Saturdays and 7 on Sundays. The services the contractors on this page list most often on their websites are residential roofing (5), attic insulation (4), commercial roofing (4), insulation services (3) and rodent proofing (3). 17 show a license on their websites and 7 have a BBB rating of A or A+. Domain records put 13 websites of the contractors on this page at ten or more years old; the oldest dates from 2000. 1 offers emergency call-outs; 5 offer financing or payment plans; 12 give free estimates; 12 are family- or locally-owned and 5 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 23 of the 24 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.
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Dorin's Insulation
“As a General Contractor, I Highly recommend Dorin and his team, as they have the capability to handel residential and commercial jobs in a professional and timely manner, with the up most reguard to customer srevice and satisfaction.”
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Attic Pros
- Wire Mesh
- Debris
- Ducts
“They tried to give us the best solution to install some materials to protect the foundation, seal all attics, and prevent any animals from getting into our rooms.”
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Element Home Solutions
- Elements
- Crawl Space
- Ducts
“The work was done quickly, and they went above and beyond repairing a few minor issues in my attic at no extra charge - it was clear they had our best interest in mind.”
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Freschi Air Service Experts
- Surge Protector
- Inspection
- Informative
“The Service Rep's were timely and explained what was being reviewed to afford me the opportunity to make a sound decision on things that had been recommended.”
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Alley Cat
- Wire Mesh
- Crew
- Warranty
“Alley Cat's team did a great job sealing the exterior and interior entry points and left our garage and belongings cleaner than they'd been in ages.”
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Acker Roofing
- Leak
- Rain
- Quality
“I am extremely pleased with the quality of material and craftsmanship, professionalism and customer service that I received throughout the entire process.”
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Bay Valley Solar Roofing
- Product
- Questions
“I didn't shop around since they were already recommended by someone who cares extremely about workmanship, and from the first visit, I knew we'd sign with them.”
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American Attic
- Debris
- Ducts
- Crawl Space
“We needed a last minute cleaning & sanitization of our crawl space to accommodate an HVAC overhaul and Juan went above and beyond to get it done on such short notice.”
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HSR Home Service
- Photos
- Company
- House
“I was going to use this company but I canceled because of repairs I needed to have done through my insurance but I definitely will be calling HSR home service to clean my ducts and vents.”
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All Seasons Insulation
- Company
- Price
- Efficient
“Insulation Company, from the estimator, Mark, to the two man crew, Amondo and Joel, that installed the cellulose insulation, containing boric acid/polyborates”
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Master Roofing Company
- Questions
- Integrity
- Project
“What I enjoyed the most was his flexibility as my general contractor made changes to the new roof per city inspector's requirement of adding 4 eyebrow vents.”
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Wonderlin Roofing Systems
- Team
- Understanding
“They left no roof debris on our property, no tar paper bits or nails or shingle bits (we had the entire roof down to the substrate replaced) it was all clean when they were done and my landscaping and home were unscathed.”
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Pacific Coast Roofing Service
- Garage
- Efficient
- Team
“Out of 6 bids, PCRS was the only one that didn't charge labor for any damage discovered during the process, which of course it was and we only paid for some lumber.”
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Central Bay Roofing & Restoration
- Call
- Quality
- Team
“I'm an Oakland homeowner and used Central Bay Roofing twice in the past year, once for a complete roof shingle replacement, and once to re-roof the flat top separate building that was pooling water on the property.”
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East County Glass & Window
- Call
- Shower
- Measured
“I have always used them for the big stuff but recently I needed some minor screen repair on a rental out of the area that prompted me to write this review.”
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Attic Renew 360
- Hvac
- Efficiency
- House
“Thank you for installing brand new insulation to my attic and adding insulation in my walls, my house is so much warm in the winter and helps me save money in my electric bills.”
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Berkeley Roof Services
“Leo was site supervisor keep things on time working the crew who all did a great job.”
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Quality Roofing Company
“Over the 4 to 5 day project Steve was frequently on-site to make sure everything was going according to plan and I had ample opportunity to talk things over with him as he made sure everything was going to my satisfaction.”
Insulation Services in Walnut Creek, CA Cost Estimates
Minimum cost
$529
Maximum cost
$3867
National Average
$1812
Avg Per Hour Rates
$72
$1137
$2616
Fair price range is based on 311 cost profiles
Why these companies made our list
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