Blown-in cellulose is an eco-friendly, recycled-content insulation that flows into every gap — ideal for topping up Portland attics to modern R-values.
Made largely from recycled paper, cellulose is dense, settles into irregular framing, and dampens sound. It’s one of the most cost-effective ways to bring an older attic up to R-38–R-60.
Attic top-ups over existing insulation, filling stud cavities via dense-pack, and hard-to-reach areas. For moisture-prone crawl spaces, we usually recommend foam or batts instead.
Roughly R-3.2–R-3.8 per inch. We measure your current depth and add the right amount to hit target R-value.
Attic top-ups frequently qualify for Energy Trust incentives. See if you qualify →
It settles modestly; we account for that by installing to the correct depth so you keep your rated R-value.
Yes — quality cellulose is treated with borate, which resists fire, mold and insects.
Usually yes, if the existing material is dry and uncontaminated. If it’s rodent- or water-damaged, we remove first — see removal & replacement.
No fee, no pressure. We confirm real pricing and your Energy Trust rebate on site.