Sebastian Spray Foam
Dense and quiet

Blown Cellulose Insulation

Dense-packed cellulose fills closed walls without opening them, slowing heat loss and quieting the rooms around it.

Why homeowners choose it

  • Fills closed walls without opening them
  • Excellent at dampening sound
  • Dense-packs into existing walls

Insulating walls without opening them

Many older homes in western Connecticut were built with plaster walls and little or nothing inside them. Opening those walls to insulate them means demolition, dust and refinishing. Dense-pack cellulose avoids that: it is blown into the closed wall cavities and packed firm, filling around the wiring and blocking inside.

On an open attic floor we use cellulose loose-fill instead, blown to an even depth after the attic is air-sealed. Either way it is dense, which is why it quiets the rooms around it as well as slowing heat loss.

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

Can you insulate walls without opening them?

Yes. Dense-pack cellulose is blown into the closed wall cavities, which is how we insulate the walls of older homes without tearing out the plaster or drywall.

Why does cellulose make a room quieter?

It packs dense, and a wall full of it slows sound as well as heat. That is why it quiets the rooms around it.

Cellulose or spray foam for an older house?

Often both. Cellulose fills the closed walls; spray foam goes where air and moisture are the problem, such as the rim joists, the crawl space or the roof deck of a finished attic. We match the material to each space at the assessment.

Best for

Existing walls, attic tops, retrofits

Not sure if blown cellulose 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