Blown In Fiberglass
Blown-in fiberglass is a loose-fill insulation designed to fill irregular spaces and gaps in attics and walls. Fire-resistant, mold-resistant, and efficiently installed using a pneumatic blowing machine.
What It Is
Loose-fill cellulose insulation is blown into attics and wall cavities using a mechanical blower. Air Seal uses premium cellulose made from 80% post-consumer recycled newsprint, treated with boric acid to make it fire and mold resistant.
Its biggest advantage: it insulates finished spaces without demolition. Small holes are drilled, the cellulose is blown in, and the holes are patched ”” the wall stays intact.
Key Benefits
- Insulates finished walls without tearing them down
- Higher R-value than fiberglass (3.5 vs 2.2-2.7 per inch)
- Fire and mold resistant ”” treated with boric acid
- Most eco-friendly option: 80% recycled, zero harmful toxins
Where It's Applied
- Attic floors ”” blown in as a thick layer
- Existing finished wall cavities (no demo needed)
- Over existing fiberglass insulation
- New construction wall and floor cavities
Best For
Retrofitting existing homes and buildings without disrupting finished surfaces. The best value for attic insulation and the top eco-friendly choice for any project with sustainability goals.