Frequently Asked Questions

Often, when the air handler and ducts are in the attic, because foam on the roof deck brings them into the cooled space. For an open attic with ducts in good shape, sealing and blowing in loose fill usually reaches the same R-value for less. We price both.

Closed-cell foam is rated R-5 to R-7 per inch by HomeGuide and open-cell R-3.5 to R-3.7. Total R-value depends on thickness, so the quote lists both.

Foam is not food for mold, but moisture trapped by a roof leak can cause problems behind any insulation. We fix leaks first and choose the foam with moisture in mind.

Florida's 2023 energy code sets R-38 for ceilings in Zone 2. ENERGY STAR suggests R-49 for an existing Zone 2 attic with no insulation.

FPL's program standards effective September 1, 2025 list a $220 ceiling insulation rebate when existing insulation is below R-8 and a participating contractor does the work. Check FPL's current terms before your job.

Several chemical companies make the two-part foam systems installers use. For your home, the right foam type, thickness and any required thermal barrier matter more than the brand.

Open-cell is the common choice for roof decks here; it is less expensive per inch and lets a roof leak show. Closed-cell suits tight spaces and metal buildings.

Foam over a sound, dry roof deck does not cause rot. Problems come from foam over leaks. Ask your roofer about their warranty terms before foaming.

HomeGuide says 24 hours or more. We confirm timing for your product.

In many spaces, yes. It depends on how the space is used and accessed. We explain what applies before the job.

An attic insulated at the roof deck with its vents closed, so it becomes part of the conditioned space.

It stays closer to indoor conditions, but some homes need a small amount of conditioned air supplied to the attic. We look at your system.

Inspectors may want to see the deck. Open-cell foam can be cut back in spots if needed. Ask your insurer about any requirements.

Usually one to two days including prep and cure.

Both work over a sealed ceiling. Fiberglass resists moisture and settles less; cellulose is denser.

FPL's standards require existing ceiling insulation below R-8 and a FPL participating contractor. Check FPL's current terms.

Yes, if it is dry and clean.

Usually a day.

Not well. The best time is during a remodel when walls are open.

It bonds to masonry, does not absorb water and gets more R-value in a thin space.

Yes. The new living space must meet the energy code, including insulation and air sealing.

Florida's 2023 energy code lists R-13 for wood-frame walls in Zone 2.

Yes. Closed-cell foam keeps humid air off the cold steel.

Usually the old faced fiberglass comes down so foam bonds to the steel.

Yes, closed-cell foam on the panels dampens it noticeably.

Insulating usually does not change much, but converting to living space can. Check with your building office.

Yes. Once it has been soaked, it usually performs poorly and can hold moisture. Fix the leak first.

Not always. If the insulation stayed dry and even, it can be topped up.

Contaminated insulation should come out. Have entry points sealed by pest control.

Not before testing. Asbestos goes to a licensed abatement contractor.