Where most summer heat gets in
Attic Insulation & Air Sealing in Baton Rouge, LA
Seal the gaps first, then bring the attic up to depth with the material that fits.
- Free on-site estimates
- Written quote listing foam type, thickness and R-value per area
- Ducts, moisture and termite clearances checked before we insulate
The Attic Is the Big One
Attic insulation and air sealing usually give a Baton Rouge home the biggest comfort change for the money. The attic is where summer heat beats down hardest, and it is where most local homes keep the air handler and ductwork. A thin or patchy attic floor, plus the dozens of small holes cut through the ceiling over the years, lets cooled air rise out and hot attic air push in.
Seal before you insulate
Loose fill slows heat, but it does not stop air. Before we add depth, we seal the paths: top plates, plumbing and wiring holes, gaps around recessed lights and bath fans, chases for flues, and the attic hatch or pull-down stairs. Foam, caulk and fitted covers close those holes. Then the new insulation goes on top.
How deep is enough
Louisiana's 2021 code summary lists R-38 for ceilings in new homes. The Department of Energy recommends R-49 to R-60 for an attic in zone 2 with no insulation, or adding R-38 to R-49 on top of 3 to 4 inches that are already there. Blown cellulose and fiberglass reach those numbers at modest cost; we write the target R-value and the settled depth on the quote and mark depth rulers in the attic so you can check it.
Ducts are part of the attic
In most homes here, the ducts run through the attic. Leaky joints and disconnected boots feed cooled air into the attic and pull hot, humid air into the system. We look at the ductwork during the visit, and if the leaks are obvious we point them out. Some homeowners pair the attic work with duct sealing by their HVAC company; Entergy Louisiana's residential overview lists duct sealing, air sealing and attic insulation rebates under its Home Performance with ENERGY STAR program, so it is worth asking Entergy Solutions what applies.
Blown-in floor or sealed roof deck
There are two ways to insulate an attic. The usual one is to seal the attic floor and blow loose fill to depth; the attic stays vented and hot, but the house below is protected. The other is to spray foam under the roof deck and seal the attic, which brings the ducts and air handler into a mild space. The second costs more, but it can make sense when the equipment and ducts are in the attic or when there is a bonus room with tricky kneewalls. We price both when both fit.
Ventilation and old material
Blown-in attics need open soffit vents, so we baffle them before blowing. If the existing insulation is wet, crushed, rodent-fouled, or looks like vermiculite, we tell you before covering it. Get a free estimate
What Attic Work Includes
The pieces that go into a typical attic job.
Air sealing the attic floor
Foam and caulk at top plates, penetrations, chases, lights and fans.
Hatch and stair covers
Insulated, weatherstripped covers for the attic access.
Vent baffles
Chutes at the eaves so blown-in does not block soffit airflow.
Blown-in to depth
Cellulose or fiberglass to the target R-value, with depth markers.
Sealed-attic foam option
Spray foam under the roof deck when ducts and equipment live in the attic.
Published Attic Insulation Costs
| Job | Range and source |
|---|---|
| Attic insulation, average job | $1,000 to $2,700, about $1,800 average (HomeGuide) |
| Air sealing | $350 to $3,000 (HomeGuide) |
| Blown-in, attic | $0.90 to $2.40 per sq ft (HomeGuide attic guide) |
| Spray foam on the attic floor | $1,100 to $6,800 (HomeGuide) |
| Spray foam on the roof deck | $1,500 to $9,000 (HomeGuide) |
| Spray foam, attic (existing home) | $2,500 to $12,000 (Fixr) |
| Old insulation removal | $1 to $2 per sq ft (HomeGuide) |
HomeGuide's January 2026 attic guide and Fixr's 2025 spray foam guide supply these national ranges. Sealing work, depth, access and removal change the total. We price your attic after seeing it, and that written number is your price.
How Attic Work Runs
1. Look
Measure depth, check ducts, vents, leaks and wiring.
2. Quote
Sealing list, material, target R-value and price in writing.
3. Seal
Close the holes and baffle the eaves.
4. Insulate
Blow to depth or spray the roof deck, as agreed.
5. Check
Depth markers set, debris cleared, results walked through with you.
Why Choose Us for Attic Insulation & Air Sealing
Sealing is on the quote
Air sealing is listed as its own line, not assumed.
Depth you can verify
Depth markers stay in the attic after we leave.
Ducts get a look
We point out duct leaks we see so they can be fixed.
Attic Insulation & Air Sealing Questions
What is the attic insulation code in Louisiana?
Louisiana uses the 2021 IRC with the whole state treated as climate zone 2 for energy. The Insulation Institute's summary lists R-38 for ceilings in new construction.
Can you add insulation over what I have?
Usually yes, if the existing material is dry and clean. If it is wet, moldy, fouled by rodents or may be vermiculite, it should come out first.
How long does attic insulation take?
Most single-family attics are sealed and blown in a day. Sealed-attic foam jobs may take one to two days plus curing time.
Does Entergy give a rebate for attic insulation?
Entergy Louisiana's 2025 overview lists attic insulation, air sealing and duct sealing rebates under Home Performance with ENERGY STAR. Check the current amounts and rules with Entergy Solutions before you book.
Attic Insulation & Air Sealing Service Areas
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Get an Attic Insulation & Air Sealing Estimate
Send us your attic questions. We will measure and send a written plan.