Blown-In Insulation in Charleston, SC
Loose fill to a real depth in a day, paired with proper air sealing so the R-value you buy actually lands.
How blown-in insulation works.
Blown-in insulation is loose fill, cellulose or fiberglass, sprayed across the attic floor to a marked depth with a blowing hose. The depth lines stay visible while it flies, so you know exactly what you paid for. Most jobs wrap in a single day.
It's the classic topping-up product: fast, budget-friendly, and genuinely effective over an attic floor that's already well sealed. Paired with a sealing pass, it's the best dollars-per-comfort product on the list.
When blown-in is the smarter buy.
Blown-in wins when the attic is open, the budget is real, and the goal is depth. Topping under-performing floors, covering old batts that are still dry, and getting a rental or a listing-ready house into the right R-range fast are all its home turf.
It's also the honest answer when a foam budget just isn't there this year. A deep, sealed blown-in floor beats a thin foam plan that never gets finished.
The honest limitation: air leaks.
Blown-in fills; it doesn't seal. Every top plate, chase, hatch, and wire hole underneath keeps leaking air no matter how deep the fill sits, and in humid Carolina air that leak path carries more than heat. It carries moisture too.
That's why we pair the two: a proper air-sealing pass under the new depth turns blown-in from okay to genuinely good. Skip the sealing and you've bought the product's floor, not its ceiling.
What a blown-in job costs (factors)
R-target over square footage is the whole math, then access. Deeper targets cost more; wide open attics cost less. Removing or disturbing old batts, hatch insulation, and baffle work add line items when they're needed.
The blower rig and a two-person crew make this our fastest job to schedule, and the price reflects it.
Blown-in vs spray foam vs batts.
Batts are cheapest per square face value and the worst at sealing around framing, especially when the install is sloppy. Blown-in fills to an even depth and rides over irregular framing, with sealing handled separately or by us. Foam seals itself, costs the most, and earns it where moisture or ducts live.
For most Charleston attic floors, blown-in plus air sealing is the efficient answer. When ducts run through the space or the crawls stay damp, foam takes over.
Ready for blown-in insulation in your house?
The free on-site assessment produces a written quote with a real number. Call the crew or send the form.
Straight answers
Blown-in insulation questions, answered.
Blown-in vs spray foam: when is blown-in the smarter buy?
When the attic floor is open, the budget is real, and moisture isn't the problem: blown-in to a proper depth with air sealing underneath gets you most of the comfort for a fraction of foam's number. Foam wins when ducts run through the space or the assembly faces humid air directly.
What R-value should my attic have in Charleston?
Our climate zone calls for roughly R-38 to R-60 across an attic floor under common insulation guidelines, and most of the older attics we open sit well below R-30. The right target for your house depends on what's already up there and what the space does.
How long does blown-in insulation last?
Decades. Loose fill doesn't settle out of usefulness in a few years the way its reputation suggests. What ages it is moisture and disturbance, which is one more reason the air sealing and any roof leaks get handled before the fill goes in.
Does blown-in insulation help with air leaks?
Only barely, and we'd be doing you a disservice to pretend otherwise: loose fill sits on the floor and doesn't close the leak paths underneath it. Paired with an air-sealing pass first, it's excellent. Alone, it's half a job.
Free quotes
Get your free on-site assessment.
Call (843) 439-8547 or send the form; the free assessment is the step that turns factors into a number.