Retrofit insulation in Hanahan SC - an older house that holds its temperature
Hot upstairs rooms and a power bill that keeps climbing usually mean the attic is thin or leaky. We seal it and add what's missing.
- Service
- Retrofit insulation
- Call
- (843) 278-0353
How can you tell your house needs more insulation?
Rooms upstairs run hot
The bedrooms under the attic or the room over the garage stay warm long after the AC kicks on, and they're the last to cool off at night. That usually means the insulation above them is thin or the ceiling leaks air into the attic, and every summer you wait, the AC runs longer to keep up.
Joists showing in the attic
You open the hatch and can see the tops of the ceiling joists, or the old insulation looks flat, gray or patchy. Matted or dirty insulation can also point to an old leak or animals, and covering it with a fresh layer just buries the problem.
Cold floors and drafts
The floors over the crawl space feel cold in winter, or you can feel air moving around outlets and trim on a windy day. That's usually open gaps and bare framing underneath, and left alone it keeps pushing your power bill up season after season.
What does adding insulation to an existing Hanahan home involve?
Retrofit insulation in Hanahan, SC means bringing a house that's already built up to where it should be by sealing the air leaks and adding insulation to the attic, the walls and the floors over the crawl space. Done in that order, it keeps upstairs rooms closer to the thermostat and keeps the AC from running all afternoon.
Most houses we see around Hanahan already have some insulation, just not enough or not where it's needed, and some of what's up there has been soaked by an old roof leak or fouled by animals and has to come out first with insulation removal. The price moves with how much is there now, whether any of it has to go, how many gaps need sealing and whether you add the walls or the crawl space too. The schedule turns on those same things, plus how easy the attic is to get into, and you'll see your own number on the estimate once I've looked at the house.
Details to note before an estimate
- Year the house was built
- Inches of insulation in the attic now
- Rooms that run hot or drafty
- Crawl space or old wiring you know of
How we handle retrofit insulation
Before I suggest anything, we measure what's already in your attic and walls, so you're not paying for more insulation than the house needs. Then we check whether the old material is clean and dry enough to keep, because fresh insulation over a wet or dirty layer only hides the problem. Next comes air sealing, which means closing the gaps around can lights, pipes, wires and the attic hatch, since insulation can't do much while air blows straight through it. We set baffles, small guards at the eaves, so the vents stay open and the attic keeps breathing, and then we blow in loose fill through a hose to an even depth all the way out to the edges, where it's usually thinnest.
Some houses need a different approach. If the attic is the only trouble spot, our attic insulation work covers it on its own. If your ductwork runs through the attic, I'll usually point you toward spray foam insulation at the roofline, because foam seals air while it insulates and keeps those ducts out of the heat. Foam costs more, though, so when the ducts aren't up there, sealing the gaps and topping up with loose fill usually gets you more for your money.
Related insulation work
Attic insulation
When the walls and floors are fine and the trouble is a thin, patchy or worn-out attic, this job brings that one space back up.
Spray foam insulation
Worth a look when your air handler and ducts sit in a hot attic, or a room over the garage just won't hold the AC.
What happens after you call about retrofit insulation in Hanahan?
Call or send a request
You call (843) 278-0353 or fill out the form, and we set a time that works for you. Tell us anything you already know, like the age of the house.
Walk the house with me
I come out myself and go through the attic, crawl space and walls with you, showing you what I find. That includes how many inches are already up there and whether any of it has to come out.
Go over the written estimate
You get a written estimate that says what we'd fix first, what comes after and why. We go over your questions until the plan makes sense, so you know what you're paying for before anything starts.
Do the work, then walk through
On the day of the job our installers protect your home and do the work in the order the estimate lays out, and I'm usually right there with them. Before we leave, we walk you through the finished space.
Questions before you book retrofit insulation
How much does attic insulation cost around Charleston?
Attic insulation in the Charleston area usually runs about $1,400 to $4,500 per job, and that's the going rate across the area, not a quote from us. Where your house lands depends on the attic's size, how much is already up there, whether old material has to come out and how much air sealing it needs. I'll give you your own figure in writing after I see the attic.
How do I know how much insulation my Hanahan attic needs?
It depends mostly on how many inches are already up there. R-value is how well insulation slows heat, and ENERGY STAR's guidance for climate zones 2 and 3 is R49 for an attic with none and R38 for one that already has 3 to 4 inches. If you can safely reach the attic, check the depth in a few spots and tell us what you find when you call.
Can my walls be insulated without opening them up?
Usually, yes, because existing outside walls can be filled with a method called drill and fill, which blows insulation in through small holes near the top of each wall cavity instead of tearing out drywall. The holes can go on the inside or the outside of the wall, so you choose which side gets them. Homes built before 1980 often have little or nothing in the walls, and if yours is that old, ask how much of the wall the work will disturb, since lead safety rules may apply.
Can you insulate walls that have knob and tube wiring?
Not around the wiring itself, because the National Electrical Code doesn't allow insulation to be applied to or surround knob and tube wiring. If your house has it, or you're not sure, tell us before you settle on wall insulation so we can plan the job around it.
What causes moisture under floors over a vented crawl space?
Floors over vented, open crawl spaces in hot, humid climates can collect moisture, and a national builders' group warns this can lead to mold, mildew and decay even when the floor was built to code. The same group doesn't recommend flooring that blocks vapor over insulation that lets vapor pass, so tell us what's on your floors before we plan the crawl space.
Who can install insulation in South Carolina?
Insulation installing is a residential specialty contractor trade listed by the state licensing board, and it covers putting in, altering and repairing insulation for temperature or sound control. A specialty contractor is one hired by a licensed builder, general contractor or property owner for trade work over $500, and this trade doesn't cover exterior roofing materials such as foam and reflective roof coatings. The state asks specialty contractors for a surety bond on work of $5,000 and over, so on a larger job, ask any installer whether they hold one. We're fully licensed and insured.
Get a written retrofit insulation plan for your house
Send the form and we'll reply within one business day to set a time for a free in-person estimate, with no pressure and no obligation. Every job we do is satisfaction guaranteed.
Explore our services and areas
Services
- Spray foam insulation
- Attic insulation
- Blown-in insulation
- Home insulation
- Insulation removal
- Crawl space insulation
- Wall insulation
- Air sealing services
- Basement insulation
- Closed-cell foam insulation
- Open-cell foam insulation
- Commercial insulation
- Crawl space vapor barrier
- Vapor barrier installation
- Attic air sealing
Set up your retrofit insulation estimate
When you call (843) 278-0353 or send the form, tell us the home's age, the attic depth and whether there's a crawl space or knob and tube wiring, so I know what to check first.