Frequently Asked Questions

HomeGuide lists a whole house at $8,000 to $20,000 and Fixr lists $10,000 to $30,000. The total depends on the roof deck, wall and other areas sprayed, not just the floor area. We measure and give you a written price.

At HomeGuide's $1.50 to $3.50 per square foot for open-cell and $3.00 to $5.00 for closed-cell, 1,500 square feet of sprayed surface works out to roughly $2,250 to $5,250 open-cell or $4,500 to $7,500 closed-cell before minimums or extras. Thickness and access change it.

On roof decks over attics with ducts, frame additions, flat-roof sections and garages turned into living space, it often is. On a simple vented attic floor, sealing plus blown-in insulation is usually cheaper.

Some inspectors and buyers worry that foam on a roof deck hides leaks or rot, and poor installs can leave odors. Those are installation and moisture issues. We check the roof first and leave access for inspection where it matters.

The 2023 Florida energy code lists R-38 ceilings in Zone 2, which includes Pinellas County. For existing attics the Department of Energy suggests R-49 to R-60 if empty.

Yes. HomeGuide advises staying out for 24 hours or more after spraying. We ventilate and tell you when it is safe to return.

Yes. The code lists R-6 on the interior or R-4 continuous for mass walls in Zone 2. Foam on the inside of the block, behind furring and drywall, is a common way to get there.

No. Wet or matted insulation should come out so the attic can dry. We remove it, check the sheathing and reinsulate.

On roof decks with ducts in the attic, additions, block walls and garage conversions, it often is. On a basic vented attic floor, blown-in usually costs less.

A properly designed unvented attic with the right foam and thickness keeps the roof deck dry in our climate. We check the roof for leaks first.

Standard foam needs open cavities. For closed frame walls, dense-pack blown insulation is usually the option; block walls are usually insulated from inside during remodeling.

Installed correctly and kept dry, it lasts as long as the building.

Home centers sell canned foam and small kits for sealing gaps. Roof decks and whole walls are normally done with professional equipment.

If it is dry and clean, yes, after sealing. Wet, moldy or rodent-damaged material should come out first.

Both work. Cellulose is denser and slows air within the layer; fiberglass is lighter and does not absorb water. We explain which fits your attic.

Most take a day, including sealing.

Duke lists a Home Energy Check, an existing attic averaging R-19 or less and a Duke-approved contractor as prerequisites. Check the program page for current rules.

A properly designed unvented attic with the right foam keeps the roof deck dry in our climate. Check your shingle warranty for any conditions.

Open-cell foam lets water show through to the inside, which helps leaks get noticed. We inspect the roof before spraying.

Not always. If it is clean and dry it can sometimes stay; if it is wet or contaminated it should come out.

An unvented attic runs much closer to indoor temperature than a vented one. Exact numbers depend on the house.

Block cores and the thin space behind drywall are hard to fill from outside. Most block wall insulation happens during remodels when the drywall is off.

The 2023 code lists R-6 on the interior or R-4 continuous for mass walls in Zone 2.

Usually insulating its ceiling or low-slope roof and walls, and sealing where it joins the house.

Yes, often by dense-packing through small holes in each stud bay.

HomeAdvisor lists 20 to 50 years with recoating every 10 to 15 years.

Sometimes, if the existing roof is sound and dry. Wet or failed roofing needs to come off first.

Low-slope roofs on additions are good candidates, since foam insulates and seals them at the same time.

Roofing work in Florida requires a permit. We discuss it during the estimate.

Usually only the wet or damaged areas, but leaks often spread farther than they look. We check and tell you how much really needs to come out.

No. Wet material should be removed and the attic dried first.

Most attic removals take a day; reinsulation can often follow the next day once things are dry.

It should be tested before anyone disturbs it. If it contains asbestos, a licensed abatement contractor removes it.