Blown-in insulation, and the other jobs

Blown-in insulation is loose fill installed with a hose on a vented attic floor. It is not spray foam.

Batts fit a stud bay. An open attic floor is a blown-in job. The gaps are the difference.

New fiberglass is about R-2.5 per inch. New cellulose is about R-3.6. Weight and the ceiling decide it.

About 15 inches of new fiberglass, or about 10.5 inches of new cellulose, from a bare ceiling.

Dry, settled fill stays and gets topped to R-38. Wet or rodent-soiled fill comes out first.

Loose fill settles. Old fiberglass is figured at R-2.2 per inch, not the new-product number.

Do not blow over a wet deck, a live roof leak, rodent contamination, or a non-IC can light.

The hose covers the ceiling. It does not seal the top plate, the cans, or the hatch.

The eaves have to stay open. Baffles keep the blow out of the soffit.

IC and IC-AT cans can be covered. A non-IC can cannot. Burying it is not an install.

The price follows attic size and the depth already there. A common 1,800 square foot gap is a planning range, not a bid.

It slows heat through the ceiling. It does not fix the ducts in the attic or promise a dollar off the power bill.

Barrel tile does not change the job. The attic is still vented, and the fill still goes on the floor.

Look, seal, blow, check the depth. Most dry top-ups are one day.

The rental machine is the easy part. The seal, the cans, and the soffits are the part people skip.

Dry fill lasts. It settles. Water, animals, and a roof leak are what end it.

A few inches of settled fill, a bare hatch, and rooms that stay hot in the afternoon.

The energy code treats the hatch as ceiling. Weatherstrip it and put a cover on the stairs.

A knee wall is not an attic floor. A bonus room under the rafters is a foam job.

Three real shops. Boca Raton, Delray Beach, and Jupiter. No invented addresses in the other cities.

The boundary is the ceiling. Seal it, keep the soffits open, install to R-38, mark the depth.

Blown-in is the vented attic floor. Foam is the roof deck. They are not substitutes.

Open-cell fills a deep bay and stays vapor-open. Closed-cell is the vapor retarder and the metal-building product.

Top plates, wires, chases, fans, and the hatch. The blow covers this. It does not replace it.

Dry and thin stays. Wet, moldy, or full of rodents comes out. Removal is priced alone.

Treatment of the bare deck after contaminated insulation is removed. Not mold remediation downstairs.

Commercial attics in Zone 1 are R-38 on the attic-and-other row. Not a return-air plenum.

Same climate, different table. Zone 1 commercial attic-and-other roofs are R-38.

Metal studs and framed cavities. Not an open attic floor. Unfaced unless the assembly needs a facing.

Foam puts the space inside the building. Occupied rooms need a thermal barrier. Two inches is not the finished R.

Closed-cell against the steel. The Zone 1 prescriptive roof is R-19 plus R-11 liner, not a drip coat.

Closing the holes roof rats use. Not traps, not poison. Contaminated insulation still comes out first.