About Masterguard
Family Owned & Operated Since 1982.
For over 40 years, Masterguard Insulation has helped Central Valley homeowners and businesses lower their energy bills and make their homes more comfortable. What started as a small family retrofit crew is still family owned and operated today — same values, better materials, sharper skills.
40+ Years
Since 1982
Family Owned
& Operated
Licensed
CA #1002958
Free Estimates
No pressure
Central Valley
Local team
Our mission
To make Central Valley homes more comfortable and more efficient — with honest recommendations, professional-grade materials, and clean workmanship on every job.
- Only professional-grade materials — Knauf fiberglass and Greenfiber cellulose
- Air sealing before insulating, always
- Clean, protected job sites — we haul everything away
- California Insulation License #1002958
Our story
Since 1982 we've specialized in the retrofit insulation and energy improvement industry — the exact skillset it takes to insulate homes that were built without enough of it. Whether you're in a mid-century ranch in Fresno or a farmhouse outside Modesto, we know how these homes are built and how to bring them up to modern efficiency standards.
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