Frequently Asked Questions

National guides put installed spray foam at $1.50 to $3.50 per square foot for open cell and $3.00 to $5.00 for closed cell (HomeGuide). Single-area jobs usually land between $1,500 and $5,000, and whole-house work runs $8,000 to $20,000 (HomeGuide) or $10,000 to $30,000 (Fixr). Your written estimate after the visit is the real number.

Closed-cell foam, at about R-5 to R-7 per inch according to HomeGuide, compared with roughly R-3.5 to R-3.7 for open cell. That is why closed cell goes in tight spaces like rim joists and basement walls.

It expands to fill gaps and hardens in place, so it both insulates and stops air leaks in one layer. Closed-cell foam also slows water vapor and adds stiffness to what it is sprayed on.

Home centers sell canned foam and small two-part kits that work for sealing gaps and small areas. Larger areas need the right equipment, temperature control and thickness to cure properly, and bad foam is hard to remove. For anything bigger than a few rim joist pockets, get a quote.

OPPD lists a weatherization rebate of $0.25 per square foot for attic insulation, capped at $500 for contractor installs and $250 for DIY, in homes built in 2004 or earlier. The finished attic must reach at least R-49, and the application is due within 90 days of installation.

Closed cell for rim joists, basement and crawl space walls and steel buildings, where you need an air and vapor barrier and high R-value per inch. Open cell for roof decks and interior cavities where filling the space and lower cost matter more. The quote will show which goes where.

It costs more than blown-in insulation, the house has to be empty while it cures, and it is hard to remove once applied. It also covers wiring and framing, so problems need to be found first. That is why we inspect before spraying.

Get at least two written quotes that list the material, thickness and R-value for each area. Ask about air sealing, ventilation, cure time and ignition barriers, and whether they will provide the invoice details OPPD needs for its rebate. Compare scope, not just totals.

It stops air from moving as well as slowing heat. Fiberglass resists heat flow but lets air pass, so drafts and moisture still travel through it. Foam fills the gap and blocks the airflow in one layer.

HomeGuide advises staying out for at least 24 hours after spraying, and longer if the product instructions require it. We ventilate during and after the work and tell you when it is ready.

Standard spray foam needs open cavities. For closed walls, dense-pack cellulose blown through small holes is usually the practical choice; our blown-in page explains how that works.

In living space, basements and most storage areas, exposed foam generally needs a thermal or ignition barrier such as drywall or an approved coating. The quote marks where that applies.

Usually yes. It is a small area, but the leak runs the whole perimeter of the house. Foaming it is one of the lower-cost foam jobs and often the first one we recommend.

Batts against concrete tend to trap damp air and can grow mold behind the vapor retarder. Foam or rigid board against the concrete, then framing, is the safer layout.

It is optional for an existing house. Sealing the rim joist gets most of the comfort benefit; full wall insulation makes the most sense when you are about to finish the space.

No. Foam slows air and vapor, not liquid water under pressure. Drainage, grading and crack repair come first.

Nebraska's code lists R-49 for ceilings in new homes, and OPPD's rebate also uses R-49 as the minimum finished value. For an older attic, that usually means adding a significant layer over what is there.

OPPD lists a weatherization rebate of $0.25 per square foot for attic insulation, capped at $500 for contractor installs and $250 for DIY, in homes built in 2004 or earlier. The attic must reach at least R-49, and applications are due within 90 days of installation.

Only if it is wet, moldy, contaminated by rodents, or if it is vermiculite that needs testing. Clean, dry insulation can stay and new material goes on top.

Not if the ceiling is sealed and the soffit vents stay open. Ice dams come from warm air reaching the roof deck; sealing and baffles prevent that.

Yes. Dense-pack cellulose goes in through small holes drilled from outside or inside, which are then plugged and patched. It is the usual approach for older Omaha homes.

Loose fill settles a little in attics, which is why we blow a bit over the target depth. Dense-pack in walls is installed tight enough that settling is minimal.

Per square foot, yes. National guides put blown-in at roughly $1.00 to $3.80 per square foot versus $1.50 to $5.00 for foam. Foam still wins in rim joists, roof decks and small spaces that need an air seal.

For an occasionally heated shop, a thinner layer of closed-cell foam is often enough to stop condensation. For a shop heated all winter, more depth makes sense. We size it to how you use the building.

Usually the old facing needs to come off or be well-attached first, because foam must bond to a sound surface. We will check what is there and quote any removal.

It depends on where the building is and how it is used. A shop with living space, or one inside city limits, is more likely to need a permit. Ask your county or city building office; we will tell you what details they will want.

Not if it is dry, clean and in decent shape. Removal is for wet, contaminated, moldy or suspect material, or when it blocks air sealing.

A typical attic is usually a one-day job for removal, with sealing and new insulation the same day or the next, depending on size.

Fiberglass and cellulose are irritants but not hazardous to remove with protection. Vermiculite may contain asbestos and should be tested before it is disturbed.