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How to read a Delray Beach attic | Cardinal

Delray Beach is two attics, and a lot of buildings that are not attics at all. East of I-95 the hatch is a closet and the walk is short. West of I-95 the villas still have 1970s and 1980s batts, and a Kings Point tower has no ceiling you can blow. Reading the building before you buy bags is the whole lesson.

Blown fiberglass on a vented attic floor, the Delray top-up
A villa with a vented ceiling can take this. A condominium tower cannot.

The walk-in shop is 955 S Congress Ave, Delray Beach, FL 33445. Customers can walk in. Call (561) 654-7698. Quotes are prepared by Russell Y, a building scientist who is BPI certified and certified to perform blower door testing. The test number is reported only when the test is run.

East Delray is a crawl

33444 and 33483 are the east side. Pineapple Grove, Lake Ida, Tropic Isle, and the houses toward the beach are older CBS, often with plaster or a fragile lid and a hatch that was cut for a person who is already inside the closet. You may get one honest measurement at the opening and a look down one bay. That is still a measurement. Write the inches down.

Settled fiberglass is about R-2.2 per inch. Four inches, which is common on this side, is about R-9. It is not R-30. The 2023 Florida Building Code puts Palm Beach County in climate zone 1A. Table R402.1.2 sets the ceiling floor at R-30. The install is R-38. From a bare ceiling that is about 15 inches of new fiberglass at about R-2.5 per inch. Over 4 inches of dry fill, the new layer is about 11 to 12 inches, installed level.

The Delray shop sits in this part of the city, at 955 S Congress Ave, in 33445. 33445 is the band around the shop and the streets just west of it. A short eave is easy to bury from a closet hatch. Section R806.3 still wants at least a 1-inch space between the insulation and the roof sheathing. If the old blow is packed into the soffit, the intake is already gone.

West Delray is the settled batt

33446 is west of I-95. Kings Point, the Villages of Oriole, Delray Villas, and The Hamlet were built with batts that have slumped. A dry batt stays. It still counts, at the settled number, not at the R-value printed the year the villa was new. New fiberglass goes over it after the plates and the hatch are sealed. Pulling every dry batt so a new batt job can be sold does not close the gaps at the wires.

A lot of Kings Point is condominiums. A mid-rise or a tower with no scuttle is not a blown-in job. There is no attic floor. A villa or a single-story unit with a vented ceiling over the rooms is the job. Say which building you have when you call. 33484 runs toward the Boca line. If the house is on that line, the ZIP matters more than the city name on the mailbox.

These attics are wider than Tropic Isle. The thin spot is often the outside wall, not the hatch. Measure both if you can stand. A pile at the opening and a bare eave averages to a lie. Depth markers, at least one every 300 square feet, facing the hatch, are how you check the crew later.

What the tape does not excuse

Wet, matted, or moldy fill comes out before any new product goes down. Droppings and nests come out too. Blowing over them holds the mess against the ceiling. A pest company gets the animals out. We do not claim that license. Removal is its own price. Sanitizing the bare deck is a second price. The blow is a third.

A roof stain is a roof repair. Insulation on a live leak stores the water. A non-IC can light needs clearance or a listed cover. A bath fan that ends in the attic is dumping shower moisture under the tile. The hose does not fix either one. Cellulose is about R-3.6 per inch and heavier. An old plaster lid on the east side often should not carry it. Fiberglass is the usual top-up.

A planning range for about 1,800 square feet with about 4 inches of settled fiberglass, brought to R-38 in new blown fiberglass, is about $2,100 to $3,350. A Kings Point villa is often smaller. An east-side crawl takes longer because of the hatch, not because the R-value changes. The range is not a bid.

Who is standing on the quote

Russell Y prepares the quotes. He is a building scientist, BPI certified, and certified to perform blower door testing. Ask to see the card at the estimate. An ACH50 number is a whole-house test. Zone 1's 7 air changes per hour is that test, not a bag count. You get the number only if the test was run. The seal on the ceiling is part of the blown-in day either way.

The listing for this city is the Delray Beach shop, 955 S Congress Ave, Delray Beach, FL 33445. Call (561) 654-7698. Customers can walk in. Boca Raton is a different shop, at 4263 NW 1st Ave, same phone. Boynton Beach has no shop. The walk-in for a Boynton attic is this Delray address. There is no second Delray pin west of I-95.

Questions on removal, attic insulation, and blown-in

Is Kings Point a blown-in job?

A villa with a vented ceiling is. A condominium tower with no attic is not. Say which building when you call (561) 654-7698.

What R-value does Delray Beach require?

Climate zone 1A. The 2023 Florida ceiling floor is R-30. The install is R-38. Four inches of old fiberglass is about R-9, not R-30.

Where is the Delray shop?

955 S Congress Ave, Delray Beach, FL 33445. Customers can walk in. Call (561) 654-7698.

Who writes the quote?

Russell Y, a building scientist who is BPI certified and certified to perform blower door testing. The blower door number is reported only when the test is run.

Blown-in insulation · (561) 654-7698

More on Blown-in insulation

Measured against the Florida code

The attic numbers, not a brochure

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.

Insulation numbers Cardinal uses against the Florida code
ItemNumberWhat it means
Zone 1 ceiling, Florida codeR-30 minimumPalm Beach and Broward
Zone 2 ceiling, Florida codeR-38 minimumNot R-49 and not R-60
What Cardinal installsR-38, depth checkedAbove the zone 1 floor
New blown fiberglassAbout R-2.5 per inchNot R-3.2 to R-3.8
Settled fiberglassAbout R-2.2 per inch4 inches is about R-9
New celluloseAbout R-3.6 per inchDenser. Still not an air seal
Open-cell foamAbout R-3.6 per inchA roof-deck product
Closed-cell foamAbout R-6.5 per inch2 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.

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