Frequently Asked Questions

HomeGuide's 2026 national range is $1.50 to $5.00 per square foot installed, with closed-cell at the higher end. Many small jobs have a minimum of $1,000 to $2,000 or more. We give you a written price after measuring.

It costs more per square foot, it is hard to remove later, and it needs careful installation and curing. On a wide-open attic floor, blown-in usually gives the same R-value for less. Closed-cell earns its cost on rim joists, basement walls and tight roof bays.

Closed-cell, at about R-5 to R-7 per inch according to HomeGuide, versus R-3.5 to R-3.7 for open-cell. That is why it is used where space is tight.

The Department of Energy recommends R-60 for an uninsulated attic in Climate Zone 4, which includes Johnson County, or adding R-49 where 3 to 4 inches are already in place. Kansas leaves code adoption to each city, so check with yours for new work.

Evergy's 2025 Kansas residential chart lists rebates for air sealing, R-38 ceiling insulation and rim joist insulation, through the program term ending December 31, 2027. Check the current terms before you schedule.

Several large chemical and building-products companies make spray foam systems. What matters more for you is that the installer uses a product suited to the spot, sprays it at the right thickness and lets it cure properly.

If your ducts and equipment are in the attic and the roofline is suitable, it can help. It changes ventilation and moisture details, so we evaluate it case by case.

Closed-cell, on the rim and walls, because it slows vapor and does not soak up water.

HomeGuide advises 24 hours or more. We confirm timing for your job.

Foam that keeps warm, damp air off cold surfaces reduces condensation, which helps prevent mold. It does not fix leaks or remove existing mold.

Usually, yes, especially combined with air sealing. Upstairs rooms in two-story homes get much of their summer heat through the ceiling.

Usually 14 to 18 inches of loose fill depending on the product.

Not if it is dry and clean. We add on top after sealing.

Most single-family attics take one day.

Yes, an unsealed pull-down stair is one of the biggest single leaks in many homes. An insulated cover fixes most of it.

Yes, it is one of the cheapest ways to warm the floors and stop drafts.

After the foam cures. We tell you when.

Usually, in living space. We explain the options.

Its 2025 Kansas chart lists $50 for at least 50 linear feet.

Sometimes, if it is reachable from an unfinished area. We look and tell you what we can reach.

Ideally, yes, especially if you are finishing. The upper part, near the surface, loses the most heat.

Yes, with dense-pack cellulose through small holes.

In older houses with empty walls, usually yes, especially in rooms with a lot of exterior wall.

Some injection foams can. Dense-pack cellulose is more common and usually costs less.

A day or two for most houses.

We lift and replace siding carefully. Any piece that cannot be reused is noted before we start.

When packed to the right density, it holds its place. Loose blowing in walls can settle, which is why we dense-pack.

It is surrounded by unheated garage and attic space. Sealing and insulating each surface usually fixes it.

Yes, usually through the garage ceiling.

Sealing the floor and shared wall closes most paths.

Yes, sized to how you heat it.

Slightly, since less house heat leaks into the garage. If you want the garage warmer, insulate its walls and door too.

Often, to fill the floor framing properly. We patch it afterward or leave it ready for your drywall finisher.

Only if it is wet, soiled, moldy or blocking needed sealing.

Usually a day for an attic.

Have it tested before anyone disturbs it.

Yes, by hand. It costs more than loose fill.

Yes. Dry, clean insulation can stay; we add on top after sealing.

The vacuum hose runs from outside to the attic, and we protect the path. Little or nothing comes through the living space.