Attic Insulation Removal
When attic insulation is contaminated or ruined, adding more on top buries the problem. We remove it with a high-powered vacuum that pulls the material through a hose into sealed bags outside, so nothing is carried through your house. Then the attic floor is cleaned down to the drywall or plaster and ready for sealing and new insulation.
When removal is the right call
| Condition | Remove? | Why |
|---|---|---|
| Heavy rodent droppings, urine staining or nests | Yes | Odor, pathogens and pheromone trails that draw new rodents |
| Water damage from an old roof leak | Yes | Wet insulation compresses permanently and can hold mold |
| Smoke or soot after a fire | Yes | Odor will not leave the material |
| Vermiculite (gray-brown pebbles) | Test first | May contain asbestos; removal follows abatement rules |
| Old but dry, clean fiberglass | No | Top it up instead |
| Insulation over knob-and-tube | Depends | The wiring decides; see the electrician step |
How we remove it
- Containment. The hatch is framed with plastic sheeting, and the route from the hatch to the hose exit is covered. The vacuum unit stays outside.
- Extraction. A technician in a respirator and disposable coveralls works from the far end of the attic toward the hatch, feeding material into a 6-inch or 8-inch hose.
- Detailing. After the bulk is out, the attic floor is HEPA-vacuumed between joists, around wires and along top plates.
- Inspection of what was hidden. With the insulation gone, we photograph the ceiling plane, wiring, duct connections and bath fan housings. This is where hidden problems show up: disconnected ducts, scorched wiring, old roof leaks.
- Disposal. Bagged material goes to an appropriate transfer station. Rodent-contaminated material is bagged and sealed separately.
Vermiculite is a different job
Vermiculite is a loose, pebbly insulation, usually gray-brown or silvery-gold, that was poured into many attics from the 1940s through the 1980s. Much of it was mined at a site in Libby, Montana that was contaminated with asbestos. The EPA advises homeowners not to disturb it. In the Puget Sound region, renovation work that disturbs suspect material requires an asbestos survey by a certified inspector first. If the test comes back positive, removal is done by a certified abatement contractor, not by us. A negative result needs interpretation, because asbestos is spread unevenly through vermiculite; we go over the lab report with you before anything is removed. Our guide on vermiculite and asbestos in attics covers the steps.
Insulation removal pricing
| Attic size | Removal and bagging |
|---|---|
| Under 900 sq ft | $1,800 – $3,000 |
| 900 – 1,400 sq ft | $2,400 – $4,200 |
| 1,400 – 2,000 sq ft | $3,200 – $5,500 |
Add 20 to 40 percent for very deep or heavily matted material, attics with low roof pitch where the crew has to crawl, or rodent contamination that needs separate bagging. Most homeowners pair removal with rodent cleanup and new attic insulation, which saves a second setup.
Questions about removal
Can I stay in the house during removal?
Yes. The vacuum pulls air out of the attic, so dust moves away from the living space, not toward it.
How much insulation comes out of a typical attic?
A 1,200 square foot attic with ten inches of old insulation produces sixty to a hundred large bags.
Can I remove it myself?
Clean fiberglass, technically yes, with a rented vacuum and a respirator. Rodent-soiled insulation carries real health risk from dried droppings, and vermiculite should not be touched before testing. We do not recommend doing either yourself.