Frequently Asked Questions

HomeGuide lists installed spray foam at $1.50 to $5.00 per square foot and a whole house at $8,000 to $20,000. Most jobs are smaller, like an attic or a crawl space. We give you a written price after a visit.

It costs more than open-cell or loose fill, it is hard to remove later, and it can hide leaks or rot if those are not fixed first. Its strengths are high R-value per inch and water resistance, which is why we use it in crawl spaces and on steel.

Alabama's code summary lists R-30 for ceilings in zone 3. The DOE suggests R-49 to R-60 for an uninsulated attic, or adding R-38 to R-49 over 3 to 4 inches.

If it is damp, musty or has sweating ducts, often yes. If it is dry, a ground liner and good floor insulation may be enough. We crawl it and tell you.

Yes. Closed-cell foam on the steel is the usual approach to stop condensation and cut heat. We size the thickness to the building's use.

A 2024 Cullman Tribune article says Cullman Electric Cooperative members can find TVA EnergyRight rebates for insulation and air sealing. Check current rules with your utility.

HomeGuide lists closed-cell at $3.00 to $5.00 per square foot installed at common thicknesses. Thicker foam costs more. We write the thickness and price on the quote.

Usually yes, because it does not soak up water and slows vapor. Open-cell is not a good choice in a damp crawl space.

Yes in heated spaces. Cold crawl spaces, attics and barns need the surface and foam within a working temperature range, so we add heat or pick a milder day.

Closed-cell slows vapor and keeps humid air off cold surfaces. It is not waterproofing and does not fix leaks.

Alabama adopted the 2015 IECC with state amendments. Alabama's amended code lists R-30 for ceilings in zone 3, which includes Cullman County.

Yes, if the old material is dry and clean. Wet, moldy, rodent-fouled or suspected vermiculite material should come out first.

Most attics are sealed and blown in a day.

Yes. The same insulation that blocks summer heat holds winter heat in.

Lights not rated for insulation contact need covers or clearance. We check each one before blowing in.

For damp crawl spaces with musty smells or sweating ducts, usually yes. For dry ones, a liner and good floor insulation may be enough.

Alabama's code summary and the DOE both list R-19 for floors in zone 3.

Usually some form of humidity control. We explain the options on the quote.

Yes. Either insulating the floor or sealing and insulating the crawl space walls warms the floor above.

Often, depending on access. Very tight spaces may need a different approach, which we explain after looking.

Often 1 inch or so of closed-cell stops drip; 2 to 3 inches or more for a shop you heat or cool. We write the thickness on the quote.

Not over loose or torn batts. Those come out so the foam bonds to steel.

Sealing gaps at seams and eaves helps, but open doors and vents will still let them in.

Foam needs the area cleared and ventilated. We plan timing with you, such as between flocks.

In some uses a protective or fire-rated coating is recommended or required. We tell you if your building needs one and include it as a separate line.

If ducts or equipment are in the attic, foam on the roof deck may be worth it. Otherwise, sealing and blowing in usually gives more for the money.

A little. We blow to the settled depth needed for the target R-value.

It is treated for pests, but rodents nest in any insulation if they can get in. Close entry points first.

Most attics take a day, including sealing.

Yes, if the batts are dry and clean.

Dense-pack cellulose is a good retrofit for closed walls. Loose blowing into walls can settle, so it must be packed.

Usually. Wet fiberglass and cellulose lose much of their R-value and hold moisture against framing.

Most attics take a day to clear; reinsulating may take another day.

It is better removed, with entry points closed first.

Yes. Damaged sections can be removed and replaced if the rest is dry and clean.

Yes, removal includes bagging or vacuuming and hauling it off.

Yes, by cutting and scraping. It is slower and costs more than loose fill.