Made a DIY guide on small blown in cellulose insulation using Leaf Blower

A homeowner posted a DIY setup for blowing in cellulose insulation using a leaf blower instead of the machines contractors typically rent or use. Cellulose insulation arrives compressed in bags and needs to be fluffed up as it's installed to reach its intended insulating value. The setup runs the material through a hose into a vacuum canister, with a shop vacuum pulling it through at the other end. Parts included a Toro leaf blower with metal blades, plastic gutter duct, rubber weather tape, paper tape, a piece of corrugated pipe, and shop vacuum hoses.

The poster also flagged a key point: air sealing has to happen before insulation goes in. That means closing off gaps, cracks, and especially the top plates (the horizontal framing where walls meet the attic) before adding insulation. Skipping that step means air can still leak through those openings, and the insulation on its own won't stop drafts or the resulting energy loss — it works alongside air sealing, not instead of it.

For a homeowner thinking about attic or wall insulation, the underlying lesson matters more than the specific gear: loose-fill cellulose has to be fluffed during installation to perform as intended, and no amount of insulation makes up for unsealed gaps in the building's air barrier. Anyone considering a DIY approach to blown-in insulation should weigh this against the cost and effort of renting or hiring standard insulation-blowing equipment, since the leaf-blower method here was described as suited to small jobs.