Internet quote
Request a call about the attic.
Name, phone, and the city. We call you back. If you already ran the planner, the numbers can ride along in the note.
Call (561) 654-7698Internet quote
Name, phone, and the city. We call you back. If you already ran the planner, the numbers can ride along in the note.
Call (561) 654-7698Measured against the Florida code
The 2023 Florida Building Code, Energy Conservation, Table R402.1.2 sets a climate zone 1 ceiling at R-30 and a climate zone 2 ceiling at R-38. Cardinal installs R-38 and checks the inches. A Florida page that lists R-49 to R-60, or R-3.2 to R-3.8 per inch for both fiberglass and cellulose, is using a different book. Table R402.4.1.1 says air-permeable insulation shall not be used as the air seal.
Quotes are prepared by Russell Y, a building scientist, BPI certified, and certified to perform blower door testing. When the door is run, the result is air changes per hour at 50 pascals, the method in R402.4.1.2. That section limits new houses in climate zones 1 and 2 to 7 ACH50. An insulation job on an existing house is not automatically that test. We report the number only when we measured it.
| Item | Number | What it means |
|---|---|---|
| Zone 1 ceiling, Florida code | R-30 minimum | Palm Beach and Broward |
| Zone 2 ceiling, Florida code | R-38 minimum | Not R-49 and not R-60 |
| What Cardinal installs | R-38, depth checked | Above the zone 1 floor |
| New blown fiberglass | About R-2.5 per inch | Not R-3.2 to R-3.8 |
| Settled fiberglass | About R-2.2 per inch | 4 inches is about R-9 |
| New cellulose | About R-3.6 per inch | Denser. Still not an air seal |
| Open-cell foam | About R-3.6 per inch | A roof-deck product |
| Closed-cell foam | About R-6.5 per inch | 2 inches is about R-13 |
Loose fill does not stop air. The holes are sealed first. Two inches of closed-cell foam is an air-seal coat, not a finished attic. We do not quote a dollar amount off the power bill. Ducts in a vented attic stay in the heat. The shop for the Boca listing is 4263 NW 1st Ave.
The form is a request for a call, not a bid. Say the city, whether the attic is vented, and whether the fill is dry. A photo of the hatch helps. The number that comes back is a planning range until someone is in the attic.
Boca Raton, Delray Beach, Boynton Beach, and the Broward cities on this site use (561) 654-7698. Jupiter, Tequesta, Hobe Sound, and the north-county cities use (754) 253-9607. Those are two shops, not one phone.
Removal, sanitizing, and spray foam are not included in a blown-in range. If the fill is wet or full of nests, say so. If the hot room is a bonus room over the garage, say that too. Those are different jobs.
Blown-in insulation, the full pageResidential insulationWhich insulation belongs in a Florida houseWho writes the quoteHow a South Florida attic actually works