Frequently Asked Questions

HomeGuide puts installed spray foam at $1.50 to $3.50 per square foot for open cell and $3.00 to $5.00 for closed cell. Single-area jobs often 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 R-3.5 to R-3.7 for open cell.

Foam does not feed mold, but if a roof, window or plumbing leak wets the framing behind it, moisture can sit there. That is why we check for leaks first and use closed-cell foam where wetting is possible.

Yes. Closed-cell foam on the underside of the subfloor seals out humid air and does not sag or soak up water the way batts do. We leave termite inspection gaps where needed.

The Insulation Institute's summary of Louisiana's 2021 code lists R-38 for ceilings in new homes. The Department of Energy suggests R-49 to R-60 for an empty attic in zone 2.

Closed cell under floors, on metal buildings and where moisture is possible. Open cell on roof decks for sealed attics and in interior walls. The quote shows which goes where.

If it stayed wet or smells musty, yes. Wet insulation loses its value and can hold moisture against wood. We check it and quote removal if needed.

Get at least two written quotes listing material, thickness and R-value for each area. Ask how moisture, termites, ventilation and cure time are handled. Compare scope, not just totals.

In the right places, yes: sealed roof decks with attic ducts, raised floors, metal buildings and new walls. For a plain attic floor with no ducts, sealing and blowing loose fill is usually the better value.

Foam itself does not feed mold, but if a leak wets the wood behind it, moisture can sit there. We fix or flag leaks first and use closed-cell foam where wetting is possible.

HomeGuide advises at least 24 hours away, longer if the product instructions say so. We ventilate the space and tell you when it is ready.

Closed-cell, at about R-5 to R-7 per inch by HomeGuide's numbers, versus R-3.5 to R-3.7 for open cell.

For most open or vented crawl spaces and homes on piers here, the floor. Louisiana's code summary lists R-0 for crawl space walls. Sealing the crawl and insulating its walls can work where the space stays dry.

Foam does not attract termites, but it can hide their tubes. We keep inspection gaps where needed and suggest you talk to your termite company.

It depends on the job, but tight spaces take longer and cost more. We check clearance on the visit.

Humidity makes them heavy, and the supports give out. Foam bonds to the subfloor and does not sag.

Louisiana's code summary lists R-38 for new ceilings. The Department of Energy suggests R-49 to R-60 for an empty attic in zone 2, or adding R-38 to R-49 over 3 to 4 inches already there.

It can be when ducts and the air handler are in the attic. It is not automatic; the attic has to be truly sealed and moisture managed. We look at your setup before recommending it.

Entergy Louisiana lists attic insulation, air sealing and duct sealing in its Home Performance with ENERGY STAR program. Its overview does not list amounts, so check current terms before work starts.

It can help in a hot attic, especially with ducts there. Sealing and adequate insulation come first; we can talk about a radiant barrier on the visit.

Keep humid air from reaching the cold steel. Closed-cell foam on the underside of the roof and walls does that.

Yes, it cuts the heat coming through the roof panels. Ventilation or cooling still matter for a working shop.

Usually the old facing has to come off or be firmly attached, because foam needs a sound surface. We check and quote removal if needed.

Standard spray foam needs open cavities. For finished walls, dense-pack cellulose through small holes is the usual approach.

The Insulation Institute's summary of Louisiana's 2021 code lists R-13 for wood-frame walls in climate zone 2.

If the walls are open, it is the best time. Foam seals as it insulates, and it costs much less than retrofitting later.

If it stayed wet, yes. Wet insulation loses its value and can keep wood damp. If it dried quickly and is clean, it may be fine; we check.

A typical attic or underfloor removal is often a one-day job, with new insulation the same day or the next.

Fiberglass and cellulose are irritants but safe to remove with protection. Vermiculite can contain asbestos and should be tested first.