Attic insulation, air sealing, crawl spaces and walls across greater Charleston: 36 cities, towns and unincorporated areas in Charleston, Berkeley and Dorchester counties. It starts with a free assessment that measures the R-value you actually have.
We are not a remodeler that also blows attics. Insulation and air sealing are the whole job, from the peninsula and the sea islands out to Summerville, Goose Creek and Moncks Corner.
The one that pays for itself first. We measure what is up there, air seal the ceiling plane underneath it, then blow to a depth we mark on a ruler you can see from the hatch.
Insulation slows heat. It does not stop air. Sealing the top plates, chases and penetrations before insulating is the difference between a warm house and a deep pile of fiber.
The floor over a vented crawl space is where damp Lowcountry air gets into a house. We look at the vents, the ground cover and the rim joist before anything else.
Houses built before energy codes often have little or nothing in the walls. Dense-pack goes in through small holes and turns a wall that soaks up summer heat into one that holds it back.
Rodent-contaminated, water-damaged or simply exhausted. It comes out under negative pressure into sealed bags, and the deck gets treated before anything new goes down.
Before anything is quoted: what R-value you actually have, where the air is going, and what the fix is worth. A written report with photographs, yours whether you hire us or not.
We measure the R-value you actually have before quoting anything, and we hand you the number in writing.
The sealing goes in before the insulation, never after — this is what a properly insulated attic is built from, and what to look for, line by line, in any written quote.
For a Dominion Energy South Carolina customer whose house is heated by electricity, Home Energy Check-up Plus covers 90% of the bill for attic insulation, air sealing and duct sealing, capped at $2,880, for jobs completed by March 31, 2027. It is the largest insulation offer in the three counties, and it runs through the program's own approved contractor, not through us. If your house qualifies, use it.
Everywhere else the money is thinner. Berkeley Electric and Coastal Electric lend rather than rebate, Santee Cooper pays toward new ductwork but not insulation, and the state's federal Home Energy Rebates have not opened. We find out which utility serves the address before quoting and tell you what its program asks for.
Read the full rebate guide →of attic insulation, air sealing and duct sealing, up to $2,880, through March 31, 2027. For electrically heated homes using 10.45 kWh or more per square foot each year; the free Home Energy Check-up comes first, and the program's own contractor does the work.
HomeAdvantage lends up to $20,000 for insulation, air sealing and duct work, repaid on the power bill after an energy audit, for members of at least twelve months. A loan, not a rebate, with a lien on the property.
The 30% Energy Efficient Home Improvement Credit is not available for work placed in service in 2026. Anyone still quoting it as part of your price is quoting something that no longer exists.
Four steps, and you know what is happening at each one. No surprise change orders, no crew that opens up a crawl space and disappears for a week.
We get in the attic and the crawl space, measure what is really there, run the infrared, and send you the whole set of photographs — yours to keep, hire us or not.
One line-itemed proposal: what gets sealed, what gets insulated, the R-value we are building to, and which program, if any, your address qualifies for. One number, and it is the number.
Floors and stairs protected, hoses run on drop cloths, and the depth marked on a ruler at the hatch so you can check the job yourself from the ladder.
A blower-door number before and after where the job called for one, and photographs of the finished depth.
NOAA's 1991–2020 normals for Charleston International put 2,434 cooling degree days in a year against 1,844 heating degree days, with about 64 days that reach 90°F.
That turns the usual insulation story around. The sun bakes the attic all afternoon, the heat pushes down through a thin layer of fiber into the rooms, and the ductwork that so often runs through the attic sits in the hottest air on the property. The air is wet as well as hot: the state climate office lists an average August relative humidity of 79 percent for Charleston, and every gap in the ceiling lets some of that moisture in for the air conditioner to remove. Sealing the ceiling and bringing the attic to depth deals with both.
Have someone look at it →Somebody comes out, gets in the attic and under the floor, measures what is there and finds where the air is going. Takes about an hour, and you get the report whether or not you hire us.
We look up the house, the vintage and the code that applies in your jurisdiction before anyone knocks on the door.
Depth, material, condition, and the ceiling plane underneath it. Infrared where the picture needs it.
Current R-value, target R-value, the cost, and which rebate program, if any, your address qualifies for.
South Carolina registers insulation installers through its Residential Builders Commission for any job over $500 and asks for a surety bond on a homeowner's job over $5,000. Most cities and towns here add a business license of their own, and Charleston County a county contractor license or registration with a decal on each work vehicle. Each town page says what that town publishes.
Every city below has its own page with the energy code that jurisdiction actually enforces, the R-value it requires, whether an attic job needs a permit there, and the building department's own number.
See every city we cover →
Free assessment, a measured R-value, and photos you keep either way.
Book my free assessment →