Yes - blown-in loose-fill is one of the more DIY-friendly insulation types for an accessible attic. The Department of Energy notes it is appropriate for unfinished attic floors, irregular areas, and filling around obstructions. You rent a pneumatic blower, feed in bags of cellulose or fiberglass, and blow it to an even depth.
Home-improvement stores commonly rent the blower, for roughly $100 to $200 per day, though some stores waive the fee when you buy insulation in bulk (HVAC.com, 2026). Budget time to learn the machine and work with a helper feeding bags below - see the full [rental walkthrough](/guides/renting-a-blown-in-insulation-machine/).
What attic safety hazards should DIYers know about?
Four big ones. Walk only on joists or truss chords, never on the drywall, to avoid falling through the ceiling. Keep loose-fill at least three inches from non-IC recessed "can" lights. Watch for hot furnace flues, and stop if you find pre-1930 knob-and-tube wiring, which can ignite in contact with insulation.
For non-IC recessed lights, ENERGY STAR advises building a sheet-metal or wire-mesh barrier so loose-fill cannot pack against the housing - fixtures labeled IC (insulation contact) may be covered directly. Keep insulation clear of hot flues: about 1 inch from metal flues and 2 inches from masonry chimneys. See [recessed can lights and insulation clearance](/guides/recessed-can-lights-insulation-clearance/) for the full rule.
DIY vs professional: how do they compare?
It comes down to cost, equipment, and risk. DIY means buying loose-fill and renting a blower - a professional adds labor but brings experience with air sealing, safe clearances, and hard spots like walls.
| Factor | Do-it-yourself | Licensed professional |
|---|---|---|
| Best suited to | Open, accessible attic floor; topping up | Walls, cathedral ceilings, remove-and-replace, problem attics |
| Material cost | ~$0.40-$1.10/sq ft fiberglass; ~$0.60-$2.30/sq ft cellulose | Rolled into the installed price |
| Installed cost | Materials + blower rental (you supply labor) | ~$1.00-$2.80/sq ft; ~$900-$3,600 typical project |
| Equipment | Rent a blower ~$100-$200/day | Contractor brings the pneumatic equipment |
| Air sealing first | You do it; EPA recommends sealing before insulating | Often quoted as part of the job |
| Old insulation removal | Adds ~$1-$2/sq ft plus disposal | Can be included in the quote |
When should you hire a professional instead?
Hire a pro when the job moves beyond an open attic floor. Finished walls need pneumatic equipment and know-how - the Department of Energy calls blown-in the most economical way to fill closed wall cavities. Also call one for insulation removal, signs of moisture or mold, poor ventilation, or any knob-and-tube wiring. A licensed company also carries the ladders, dense-pack gear, and disposal setup that make removal-and-replacement manageable.
Related questions
Sources
5 cited- Blown-in insulation as a DIY-suited material for open attic floors: U.S. Department of Energy, Insulation Fact Sheet, DOE/CE-0180, 2008 (checked 2026-08-19).
- Blower rental cost and material coverage: HVAC.com, How Much Does Blown-In Insulation Cost?, 2026 (checked 2026-08-19).
- Installed professional pricing and removal cost: HomeGuide, Blown-In Insulation Cost, 2026 (checked 2026-08-19).
- Recessed light clearance and air-sealing guidance: ENERGY STAR, Attic Insulation Project; ENERGY STAR, Attic Air Sealing Project (checked 2026-08-19).
- Non-IC recessed lighting clearance rule: U.S. Department of Energy, Building America Solution Center, Recessed Lighting Code Compliance Brief, 2015 IRC (checked 2026-08-19).