Frequently Asked Questions

National guides put installed foam at $1.50 to $5.00 per square foot (HomeGuide). Open-cell is at the low end, closed-cell at the high end. A raised-floor job or an attic roof deck often lands in the low thousands. We give you a written price after a visit.

It seals air and insulates in one step, does not settle, and closed-cell resists water. It costs more than loose fill, it is hard to remove, and it can hide leaks or termite activity if those are not handled first.

Foam is not food for mold, but if a roof or plumbing leak wets the wood behind it, the wood can still rot or grow mold. That is why we check for leaks first and why sealed attics need humidity under control.

Usually yes. The DOE suggests R-13 for an uninsulated floor in zone 2. Closed-cell foam under the subfloor seals drafts and does not soak up water if the area floods.

Louisiana's code summary lists R-38 for ceilings in new homes. The DOE suggests R-49 to R-60 for an uninsulated zone 2 attic, or adding R-38 to R-49 over 3 to 4 inches.

Entergy's Energy Smart page describes home assessments with instant discounts or free weatherization on recommended follow-up work. Check current rules and amounts with the program.

Several companies make spray foam systems for contractors. We tell you which product we plan to use on your quote, and you can look up its data sheet.

Usually, because it does not soak up water and it holds up in outdoor air better than batts. Open-cell is not a good choice under a raised floor.

Closed-cell slows vapor but the subfloor can still dry to the inside of the house. Problems come when a leak wets the wood, so plumbing leaks get fixed first.

It firms up quickly, but HomeGuide advises staying out of the house for at least 24 hours. We confirm the timing for your job.

Shingles on a foamed deck run a little warmer. Some shingle makers have rules about unvented roofs, so check your warranty paperwork. We can give you the foam type and thickness to ask them.

No, a sealed attic is unvented by design. It does need humidity managed, often with a small air supply or dehumidifier.

Yes. Clean, dry fill can stay. Wet, moldy or rodent-fouled material should come out.

Most homes take one to two days plus curing time. Plan to be out for at least 24 hours.

A raised floor with little or no insulation is exposed to outside air underneath. Foam under the subfloor fixes the drafts and the chill.

Sometimes, depending on access. Very low spaces may need a larger opening or a different approach. We check during the visit.

Yes. It keeps humid air from leaking up through the floor and reduces moisture on ducts and framing.

Ducts under a raised house should be well sealed and insulated. We point out any that are sweating or falling apart.

Yes, when they are enclosed and conditioned. The same under-floor approach applies.

Usually, with dense-pack cellulose through small holes, from inside or outside.

Packed at proper density it should not settle much. Loose blowing into walls is what settles.

Work done from inside usually does not change the exterior. If holes are drilled outside in a historic district, check with the HDLC or VCC first.

In a shotgun, the side walls are most of the exterior, so yes, they are often the next step.

Dense-pack cellulose fills the cavity and dampens some sound. Windows and doors still carry most of the noise.

If ducts and equipment are in the attic, foam on the roof deck often makes sense. If not, sealing and blowing in to depth usually gives more for the money.

It is treated for pests and fire. Rodents can still nest in any insulation if they can get into the attic, so entry points should be closed.

Most attics are sealed and blown in a day.

Loose fill settles a little. We blow to the settled depth needed for the target R-value.

Yes, if the old material is dry and clean. Wet or fouled material comes out first.

That depends on your policy and the cause. Our itemized quote helps you and your adjuster see the work.

Lightly damp loose fill may dry if the leak is fixed fast, but flood-soaked or matted insulation should be replaced.

Most attics take a day to clear. Under-floor removal depends on clearance.

We remove insulation, not mold. If we see mold on framing, we tell you so it can be handled by the right specialist.

Yes. If a leak soaked one section, we can replace that area and blend new material into the rest, as long as the remaining insulation is dry.