Insulation in Sunnyvale - Same-Day Service, Done Right the First Time
We provide fast, reliable, and affordable insulation services across Sunnyvale to keep your home safe and running. Licensed, insured, and trusted by local homeowners.
At Walt's Insulation, we specialize in fast, reliable, and affordable insulation services for homeowners and businesses.
About Us
Our Simple 3-Step Process
Request Service or Call Us
Call us or send a quick message. Tell us your insulation issue and we'll schedule a convenient time.
Inspection & Free Estimate
Our technician arrives on time, inspects the problem, and gives a clear, upfront estimate with no hidden fees.
Fast Repair on the Spot
We fix the issue quickly using high-quality parts and proven techniques - working like new before we leave.
Don't let a broken insulation slow you down. Contact Walt's Insulation today and our experts will handle everything - from diagnosis to repair, quickly.
Call (669) 215-4805
What Our Customers Are Saying
"Walt came out himself, stuck his head in the attic, and told me I had about four inches where I needed fourteen. No sales pitch, just the number and what it would cost to fix it. Crew was here two days later."
"Radiant barrier and new insulation in one visit. Walt explained what the foil actually does and what it does not, which nobody else bothered to. Electric bill in July was the lowest it has been in this house."
"The house had rats in the attic insulation and a smell we could not place. Walt's crew pulled all of it, sealed the gaps where they were getting in, sanitized, and put in new blown-in. He sent photos of the sealed openings so I could see it done."
"Spray foam in the garage ceiling under the bonus room. That room used to be unusable in summer. Walt talked me out of foaming the whole attic because it did not need it - saved me a couple thousand and I trust him more for it."
Areas We Proudly Serve
Serving Sunnyvale, CA - Our Local Coverage Area
We're based in the Sunnyvale area and know this community well. Use the map below to see our service coverage - if you're nearby, we can almost certainly help.
Request Your Free Estimate
Prefer to talk now? Call us directly - we answer fast and dispatch even faster. No obligation, no sales pitch.
Call or Text(669) 215-4805Request A Free Quote
Insulation Service Across the Sunnyvale Area
We Are the Sunnyvale Team for Walt's.
Walt Brenner sticks his own head in the attic before he quotes anything, and tells you the depth you have and the depth you need in inches, not adjectives. He has talked more customers out of spray foam than into it. The written price is the price, the crew's van has his name on it, and he still answers the phone himself - including when somebody texts him a moisture reading from a crawl space he did six years ago.
Same training, same parts, same pricing practice, and the same 90-Day Done Right Promise - delivered by people who live here.
Visit Walt's →Part of the Locally Family.
Locally is a family of home-service brands held to one written standard, and Walt's is the insulation company in it. One promise stands behind every trade, in every town.