Sebastian Spray Foam
Fast, even coverage

Blown Fiberglass Insulation

Loose-fill fiberglass blown to a consistent depth for dependable thermal and acoustic performance. Fire-resistant and well suited to open attic floors.

Why homeowners choose it

  • Even coverage with no settling gaps
  • Fire- and moisture-resistant
  • A dependable material for open attic floors

Why the order matters

Blown fiberglass goes on an open attic floor, and it goes on last. Fiberglass slows heat, but air moves through it, so we close the paths first: the top plates, the penetrations around pipes, wires and ducts, and the attic hatch. Insulation only performs as rated once that air movement stops.

Then we blow the fiberglass to an even depth across the whole floor. Loose-fill works its way around joists, wiring and blocking where cut pieces would leave gaps, and it is fire- and moisture-resistant.

How we install it

1

In-home assessment

We inspect your attic, walls, or crawl space and find exactly where your home is leaking energy.

2

A clear, fair quote

You get a straightforward plan and price, the right material for each space, no upsell.

3

Air sealing and a clean install

We air seal the envelope, then insulate, protecting your home throughout and leaving it spotless.

Questions homeowners ask

Is blown fiberglass right for a finished attic?

Usually not. It belongs on an open, unfinished attic floor. A finished attic, bonus room or cathedral ceiling gets spray foam on the roof deck instead, so the space itself is conditioned.

Fiberglass or cellulose for an open attic floor?

Both work there. Fiberglass is fire- and moisture-resistant; cellulose is denser and better at quieting a room. We recommend one at the assessment, based on the attic and what is already in it.

Will the house be protected while you work?

Yes. We cover and protect the rooms we work through and the path to the attic, and we leave the house cleaner than we found it.

Best for

Attic floors, interior walls, sound control

Not sure if blown fiberglass is right for your space? We'll assess your home and recommend the material that actually fits.

Request an estimate

Done properly the first time.

Request an estimate and we'll assess your home or building, specify the right material for each space, and give you a clear plan. On time, and spotless when we leave.

Call nowRequest an estimate