Masterguard

Masterguard runs an insulation business out of Fresno that covers the Central Valley. The family-owned outfit has handled attic insulation, removal of old or damaged material with air sealing, wall insulation, radiant barrier installs, and QuietCool fan work since 1982. They take calls for free estimates at (559) 999-8586 and send crews to Fresno, Clovis, Madera, Sanger, Tulare, Visalia, Kerman, Lemoore, Modesto, Reedley, Merced, Turlock, Oakdale, Los Banos, Hanford, and Bakersfield.

Homeowners bring them in when old attic insulation fails to keep heat out or shows pest damage along with poor airflow. Gary takes the first calls, answers questions about options, and lines up the work. Patrick, Greg, and the rest of the crew pull out the bad material, blow in fresh fiberglass or cellulose in attics and walls, seal gaps, and add radiant barriers or fans where needed. After the jobs finish, people report houses that hold a steady temperature on hot days, less outside noise inside, and cleaner attic spaces.

Crews arrive at the scheduled time, finish most projects in a single day or two, clean up the work area, and send photos of the completed insulation. Reviewers note clear explanations throughout the process, solid communication from the first contact to the end, and prices that beat other bids without shortcuts. The team works around older homes, keeps things respectful, and handles both insulation and related pest exclusion in the same visit.

Google shows a 5 from 12 reviews with repeated notes on timely arrivals, straightforward pricing, and real changes in home comfort and sound levels. DIRT Score 4 from 12 reviews on Finds.

DIRT Score = confidence-weighted rating across verified review platforms. How is this calculated? →

“What a difference in just a matter of minutes! The house had original crappy insulation and wouldn't cool below 84 degrees. After the insulation, I get to enjoy my house at my preferred settings Thanks to Masterguard”

“Hired Masterguard based on rec from a good friend. Masterguard completed my 1930 home in a single day and at a great price. NOW I also recommend Masterguard. My house is well insulated AND an unexpected bonus - my home is silent. You can really hear the difference. Money well spent on the project with trusted contractors Stop with the google - and call them.”

“As a first-time homebuyer, I wasn't entirely sure what I was getting into when I discovered my 40-year-old home in Yosemite Lakes Park (YLP) still had its original attic insulation — along with signs of pest damage, poor air circulation, and aging ductwork. Fortunately, I found Masterguard Insulation, and they turned what could have been a stressful project into a smooth, educational, and even enjoyable experience. Scheduling the appointment and learning about the process with Gary was exceptional. He was friendly, knowledgeable, and incredibly helpful in walking me through all the options. As someone new to homeownership, I really appreciated how easy he made everything to understand — no pressure, just honest guidance. When it came time for the work, Patrick and Greg handled the complete attic makeover with professionalism and skill. They removed the old, damaged insulation, sealed up problem areas, replaced all the old ducts, installed new insulation, and even added an attic fan to improve ventilation. The transformation was impressive. On top of doing an outstanding job, they were great to work with — friendly, efficient, and incredibly patient with all of my (many!) questions.”

“I recently hired Masterguard for insulation work and pest exclusion, and I couldn't be more impressed with the entire experience. Before choosing them, I compared pricing from several other companies, and Masterguard offered the best value by far. They provided high-quality service at a reasonable price without cutting corners. From the first phone call to the final pictures they shared with me upon completion, their work was impressive and their communication was outstanding. Every team member I interacted with was professional and respectful of my older home. They took the time to explain each step of the process, which made me feel confident and informed throughout the project. They arrived on time every day, worked hard and efficiently, and left the space clean. You could tell they truly care about doing quality work and respecting the property. It’s rare to find a company that is this thorough and customer-focused. If you’re looking for a company that values professionalism, cleanliness, and transparency, Masterguard is the one to call. I am extremely satisfied, and highly recommend them!”

“As an HVAC contractor, I've been recommending my clients to Masterguard for years when I noticed that their attic insulation values had dropped due to age and/or having had too many service providers in the attic, compressing their nice fluffy insulation. Recently, I got to experience Masterguard from the customer side of things when they removed/replaced a family members attic insulation. I called Gary at Masterguard and explained what needed to be done. He asked a few particulars about the job in question and within minutes I had a price. Patrick & Greg showed up at the appointed time and did a great job of removing all the old insulation, which allowed us to get into the attic and do some much needed duct/electrical repairs. Due to some scheduling conflicts on my end I had to reschedule the blowback of the new insulation, but Gary was supercool about everything and scheduled a date that allowed us to get the work we needed to do without feeling rushed. Greg and Patrick came back out and did a fantastic job of insulating the attic and showed us pictures of the finished work. Everything went off without a hitch and I couldn't be happier. If you're on the fence about who to use, I ”

“My 1957 house had no insulation in the walls and open patches in the attic. I used to joke it was like trying to keep a cardboard box cool. Masterguard, first of all arrived exactly at the time they said they would both days, which I appreciated since I was in a tight schedule. They filled the walls then a couple days later the attic was topped off. Now it's a comfortable 77 inside while it's 105 outside. I also didn't realize how much outside noise I used to hear until it was gone after the insulation was added. It is so quiet now it is noticeable. I don't hear any outside noise. It's finally comfortable inside my home on a hot summer day as it should be.I expect it to hold the heat better in the winter too. If you have an old home without insulation in the walls like I do, give these guys a call. They can improve your home quality of life as they did mine.”

“Awesome experience from the get go. Spoke with Gary Jones and within an hour had a quote for insulating my attic. Set up an appointment around my schedule and the guys arrived on the day we set up and in the timeframe we spoke about. Guys came in took care of the job in a few hours. Cleaned up the little mess they made and showed me pics of my attic with insulation. Very happy with service and can already tell difference in my homnes temperature.”

“Gary Jones and installer arrived on time to work on my attic. They did the work efficiently and courteously. The cleaned up the work area and told me about attic area. I will be sure to tell my family and friends about them and Masterguard.”

“This company is amazing! From the moment Gary talks to you (first point of contact) through the whole process when the team arrives. They go above and beyond with their services and perfect work. They are masters of their craft. Any problem that you may have dealing with your attic, They have the solution. Patrick is great, the whole team is. Call this company for any insulation-demo, install, attic fans, windows, and more. They are the BEST!”

“Honest, reliable and very professional. Pat was patient and explained the process in depth. My family will definitely use this service again for our other properties.”

“Gary, Greg and John were all very nice and easy to work with. I hope the insulation makes a difference on our PG&E bill”