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Serving Hanahan, SC and surrounding areas. (843) 543-6405
Hidden gaps in your home let cool air escape and hot, humid outdoor air in. We find and close them so your AC stops working overtime every summer.
Air sealing services in Hanahan find and close the hidden gaps where conditioned air escapes and outdoor air enters, most jobs are completed in one to two days with most work contained to the attic and crawl space.
Most people assume air leaks are around windows and doors, but the biggest culprits are typically the attic floor, the crawl space ceiling, and spots where pipes or wires pass through framing. In Hanahan, where the AC runs for eight or nine months a year, every gap in your home's shell is costing you money every single day. Air sealing works best when combined with basement insulation or attic insulation, since both measures address related problems from different angles.
In a climate as humid as Hanahan's, air sealing also has a moisture-control benefit: it keeps warm, humid outdoor air from getting into your walls and crawl space where it can condense and cause damage over time. The U.S. Department of Energy has established that air sealing is one of the most cost-effective energy improvements a homeowner can make.
If your electric bill climbs every summer even though you are not changing how you use your air conditioning, leaking air is a likely cause. In Hanahan, where cooling costs dominate the energy budget for most of the year, a home that leaks conditioned air forces your system to run almost constantly. If your bills feel out of proportion to your neighbors', air leakage is worth investigating.
If one bedroom is always stuffy in July or one corner of the house never quite cools, that room likely has more air leakage than the rest of the house. Uneven comfort is one of the most common complaints homeowners describe before getting air sealing done. The fix is usually not a bigger air conditioner - it is closing the gaps that are letting cool air escape.
Hanahan's summer humidity is intense, and when outdoor air finds its way in through gaps, it brings that moisture with it. If you smell mustiness in a closet, see condensation on walls, or notice that your home feels damp even with the AC running, humid outside air is likely getting in somewhere. Left alone, this can lead to mold growth inside walls and in the crawl space.
Hold your hand near an electrical outlet on an exterior wall on a hot summer day - if you feel warm air coming through, that outlet connects to the outside through gaps in the wall. The same test works near baseboards and where the floor meets the wall. These small openings are easy to miss but add up to significant air exchange over the course of a day.
We approach every air sealing project in Hanahan as a whole-house problem, not a collection of isolated fixes. The work focuses on the attic floor, the crawl space ceiling, and all the penetrations where pipes, wires, and ducts pass through framing. We use a blower door test - a temporary fan mounted in your doorway - to measure exactly how much air your home is leaking before we start. That gives you a real baseline number. When the job is done, we run the test again so you can see the improvement in actual measurements, not just our word for it. We also work closely with our attic air sealing specialists for homes where the attic is the primary source of leakage.
Because Hanahan homes commonly sit on crawl spaces, our crawl space air sealing process is a core part of what we do - not an add-on. Warm, moist ground air rises through floor gaps directly into your living space, and closing that pathway makes a bigger difference than almost any other single action. When basement insulation or crawl space insulation is also needed, we coordinate both scopes so you are not managing two separate contractors.
Best suited for homeowners who want a comprehensive treatment of the attic, crawl space, and all major penetration points with before-and-after blower door testing.
Best suited for Hanahan homes on crawl spaces where rising humidity and ground air are the dominant source of leakage and indoor comfort problems.
Best suited for homes where the attic floor has open chases around plumbing, wiring, or recessed lights that are allowing conditioned air to escape into unconditioned space.
Best suited for homeowners who want to address both air leakage and heat transfer in a single visit for the greatest reduction in energy costs.
Hanahan's climate means air conditioning runs from roughly April through October - a much longer stretch than most of the country. Every month your home leaks conditioned air is a month you are paying to cool air that escapes before you can use it. The cooling season is so long here that the energy savings from air sealing add up faster than they would in a northern state, which means the work pays for itself more quickly. Many of Hanahan's neighborhoods were developed in the 1960s through 1980s, when framing gaps, unsealed top plates, and open chases around plumbing were standard practice - which means older homes here often have more leakage than newer construction. Homeowners in nearby West Ashley and North Charleston face the same combination of older housing stock and long cooling seasons.
A large share of Hanahan homes are built on crawl spaces rather than slabs, and an open or vented crawl space is one of the biggest sources of air leakage and humidity in a Lowcountry home. Warm, moist ground air rises directly into your living space through gaps in the floor above - bringing humidity, allergens, and higher energy costs with it. Air sealing a Hanahan home without addressing the crawl space is like patching one hole in a leaky bucket. The U.S. Department of Energy estimates that air sealing can cut heating and cooling costs by 10 to 20 percent in a typical home - and in Hanahan's long cooling season, that translates to real dollars on your bill every month.
We reply within one business day. We will ask about your home's size, whether it has a crawl space, and what problems you have noticed - so we arrive prepared for your specific situation.
A technician visits your home and runs a blower door test - a temporary fan in your front door that measures exactly how much air your home is leaking. This gives you a real before number to compare against after the work is finished.
You receive a written estimate explaining what work is recommended, where the biggest leaks are, and the total cost. A good contractor walks you through this in plain language before asking you to sign anything.
The crew seals gaps using foam, caulk, and other materials, working from the attic down through the crawl space. When finished, we run the blower door test again so you see the before-and-after numbers - and we provide documentation for your tax credit or rebate claim.
Free estimate, no obligation. We measure before and after so you can see the improvement for yourself.
(843) 543-6405We measure your home's air leakage before we start and again when we finish. That gives you actual proof of the improvement - not just a promise. A contractor who skips this step has no way to prove the work made a difference, and neither do you.
Most Hanahan homes sit on crawl spaces, and we treat the crawl space as a core part of every air sealing project - not an optional add-on. If you have a vented crawl space, that is often where the most leakage is, and we address it every time.
Air sealing in Hanahan's climate has to account for moisture movement - sealing incorrectly can trap humidity inside walls. We follow practices suited to the Building Performance Institute standards for hot-humid climates so moisture moves in the right direction.
Between the federal tax credit (up to 30% of project cost) and rebates from Dominion Energy South Carolina and Berkeley Electric Cooperative, a significant portion of your investment can come back to you. We provide the documentation you need to claim every benefit available.
When you hire Hanahan Insulation, you get a licensed contractor who measures results, understands Lowcountry crawl space conditions, and handles the paperwork so your tax credits and rebates are ready when you need them.
Insulate the lower levels of your home to stop heat and moisture from entering through the foundation.
Learn MoreTarget the attic floor specifically - where open chases and unsealed penetrations account for a large share of whole-home leakage.
Learn MoreContact Hanahan Insulation today for a free, no-pressure estimate and a real measurement of how much air your home is leaking.