Best Cellulose Insulation

Cellulose insulation delivers more than just R-value. It combines thermal performance, sound control, and eco-friendly materials to make your home quieter, safer, and more energy efficient.

At Thermo Shield, we install Sanctuary® cellulose insulation from Greenfiber® — engineered to create healthier, more comfortable living environments.

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Why Cellulose? 

Made from 85% recycled paper and treated for fire resistance, cellulose is one of the most sustainable and cost-effective insulation choices for Arizona homeowners.

  • Superior Thermal Performance – Helps keep indoor temperatures stable.
  • Noise Reduction – Dense-fill technology reduces sound transmission between rooms and from outside.
  • Wellness-Focused – Studies link lower household noise to reduced stress and better cardiovascular health.
  • Eco-Friendly – Diverts 160,000 tons of paper from landfills each year; manufactured with a carbon-neutral process.
  • Safe & Durable – Non-combustible, mold-resistant, and long-lasting.

Why Choose Thermo Shield?

SRP preferred Contractor
Energy Star Century Club Award
Stabilize Cellulose Insulation
BPI Certified
Lifetime Warranty

Wall Insulation with Cellulose

Cellulose isn’t just for attics — it can also be dense-packed into wall cavities to improve comfort and efficiency throughout your home. By filling every gap and seam, wall insulation helps eliminate drafts, reduce noise, and stabilize indoor temperatures.

Garage Walls
Adding blown-in insulation to garage walls reduces hot and cold spots, lightens your HVAC workload, and helps your system run more quietly and efficiently. It can also lower utility bills, shrink your carbon footprint, and may even qualify for rebates or tax credits — while boosting resale value with year-round comfort.

Interior Walls
Dense-packed cellulose also works as a sound barrier, cutting noise between rooms and from the outdoors. Small drilled holes are used to inject insulation, then patched and sealed, allowing most homes to be upgraded in just a day or two with minimal disruption.

The R-Value Advantage 

R-value measures resistance to heat flow — the higher the R-value, the better the insulation.

  • Most Arizona homes should achieve R-38 to R-60 in the attic (about 13–16 inches of cellulose).
  • Sanctuary® cellulose can be installed loose-fill in attics or dense-packed in walls for maximum efficiency.
  • Our team installs to manufacturer specs to ensure insulation meets the labeled thickness and coverage.

How Long Does Cellulose last?

Cellulose insulation typically lasts 20–30 years. With proper installation and regular inspections, it provides decades of comfort, efficiency, and peace of mind.

Do You Have Enough Insulation?

Nearly 90% of Arizona homes are under-insulated, leading to higher bills and less comfort. Signs your home may need more insulation:

  • Uneven room temperatures
  • Drafty walls or ceilings
  • High summer cooling costs
  • Visible low or uneven attic insulation

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From air sealing to blown-in cellulose, we’re Arizona’s trusted choice for better comfort and energy savings.

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