What Mission Viejo Homeowners Say About Walt’s Insulation
Reviews tell you more about a contractor than any estimate ever could. We know that, because we read them too. For 25 years, our work in Mission Viejo attics, crawl spaces, and walls has been judged by the people who live with it every day. The comments below come from actual customers across the county, people who called us about high energy bills, stuffy upstairs rooms, or insulation that had seen better decades. We’re sharing them because they show what we actually do, not what a marketing department says we do.
Recent Reviews
“Our upstairs bedrooms in Mission Viejo were hitting 84 degrees every summer afternoon. Walt’s crew came out, found gaps in the attic floor that had been there since the house was built, air sealed everything, and blew in fresh Owens Corning fiberglass. The difference that first week was almost hard to believe. Our AC actually cycles off now.”
Alma D. - Mission Viejo, near Lake Mission Viejo
“We had rodent activity in the attic and the old insulation was frankly disgusting. Walt’s removed everything, sanitized, rodent-proofed the entry points, and installed new blown-in insulation. The crew wore uniforms, introduced themselves, and left the garage cleaner than they found it. Exactly what you hope for when you let people into your home.”
Travis W. - Mission Viejo, near the Shops at Mission Viejo
“Got three bids for spray foam in our crawl space. Walt’s wasn’t the cheapest, but they were the only ones who walked the whole space, took moisture readings, and explained the difference between open-cell and closed-cell Icynene. They even suggested a vapor barrier upgrade that the other companies never mentioned. That’s the difference between a salesman and someone who actually does the work.”
Miguel D. - Mission Viejo, near Oso Creek
“Our 1970s home still had the original insulation, which was basically dust. Walt’s sent two technicians who removed everything, air sealed the attic floor, and blew in Knauf insulation to R-38. They finished by 2pm, did a blower door test to prove the improvement, and showed me the before and after photos. My wife noticed the living room felt warmer that same night.”
Kevin K. - Mission Viejo, near Saddleback College
“We called on a Sunday expecting voicemail. A real person answered, set us up for Monday morning, and the tech arrived right on time. The whole inspection took under an hour and we had a written estimate in hand before he left. No pressure, no scare tactics, just straight answers about what our attic needed.”
Alma D. - Mission Viejo, near the Village Green
“Walt’s installed a radiant barrier under our roof deck and re-insulated the attic at the same time. Our summer electric bill dropped by 22 percent compared to last year, same AC settings, same schedule. The city inspector who came out for the permit even commented that the job looked clean. Worth every penny.”
Travis W. - Mission Viejo, near Mission Viejo Country Club
Why Customers Trust Us
The pattern in those reviews isn’t a coincidence. It comes from how we’re built. We’re owner-operated, not a franchise. Walt Brenner still answers the phone himself on plenty of weekends, and he’s the same person who signs off on every job. Our technicians are background-checked and uniformed, so the person at your front door is someone you can identify and trust. Every job is covered by the Done Right Promise: if it’s not done right, we make it right, for as long as you own the home. We install products from Owens Corning, Rockwool, Icynene, Johns Manville, CertainTeed, Demilec, Knauf, and GreenFiber because those manufacturers stand behind their material the way we stand behind our labor. We’re the one down the road in Mission Viejo, with a published address and a license number you can look up. When you’re ready to talk about your attic, crawl space, or walls, call (949) 528-8707. A live person answers, every time.
Written by Walt Brenner, Owner at Walt’s Insulation, serving Mission Viejo since 2000.