Drafty walls or a hot room over the garage? Closed-cell foam seals the air leaks and insulates in one dense layer.
Closed-cell foam insulation is a dense spray foam we apply to wall cavities and the underside of roof decks in North Charleston. At its usual thickness, one layer insulates, stops air leaks and keeps moisture vapor from passing through.
Most folks who call me about foam have a drafty wall, a hot room over the garage or ductwork cooking in the attic, and they've heard foam fixes all of it. It often helps, but it costs more than other insulation. In a plain attic, sealing the gaps and topping up the blown-in insulation usually does the job for less, unless your ductwork lives up there. The price moves with how much area you want covered, how thick the foam goes, how hard the space is to reach and whether old or wet material has to come out first. The schedule turns on those same things, plus any permit the job needs and a day when your household can be out of the house. I write the estimate out step by step, so you can see what goes where before you decide.
I come out to look at every job and write the estimate myself, step by step, so you can see what goes where and why. When we spray, our installers do the work with me or a lead installer on site.
I spent years as an HVAC service tech before I started this business in 2023. In attic after attic, the real trouble was the leaks and thin spots around the equipment. If your job can wait, I'd rather tell you than sell you foam your house won't use.
We're licensed and fully insured, and our promise on the work is satisfaction guaranteed. When you're ready, call (843) 278-0240 or fill out the form on this page, and I'll set up a time to come look at your walls or attic.
Tell us which areas you want foamed, a rough size for each and whether anyone at home has asthma or allergies, and we'll reply within one business day. Then I come out, look over the space and write you a free estimate on site, with no pressure and no obligation.
North Charleston's code requires proper permits to alter any structure, and the city's Building Department issues them. Its permit list names new construction and renovations but doesn't mention insulation, so the list alone doesn't settle whether your foam job needs one. We find out which city or county office covers your address, check what it asks for and take care of any permit your job needs before we start. The city schedules every inspection online through its permit portal, so if your job has one, I'll tell you at the estimate who's booking it.
Most of our calls here come from older houses, many with ductwork and an air handler in the attic, and rooms over garages that run hot all summer. We also hear from landlords and small business owners with rentals and shops. We're based in North Charleston and do the same work across the cities around it, including Hanahan and Goose Creek. If your city isn't listed, call and ask.
Around Charleston, closed-cell spray foam usually costs about $1.00 to $1.60 per board foot. That's the going rate in the area, not a quote from us. A board foot is a square foot of foam an inch thick, so 1,000 square feet sprayed 3 inches deep counts as 3,000 board feet, and the price climbs with both the area and the depth. My estimate shows where each part of that goes.
Plan to be out during the spraying and for at least 24 hours after. That's what federal consumer safety guidance for spray foam advises, so line up a place for the family and pets to stay first. EPA guidance adds that you go back in only once the foam has cured, the house has been aired out well and everything has been cleaned thoroughly. Ask us when each of those is done, and we'll go over the safety steps with you before the day comes.
Yes. A Department of Energy building guide rates closed-cell foam as the preferred choice for frame wall cavities in hot-humid climates. The guide's reason is that the foam seals air and controls moisture vapor at the outside of the wall, either at full thickness or as part of a hybrid with another insulation. Whether it fits your walls mostly comes down to whether they're open.
Yes. Closed-cell foam sprayed under the roof deck significantly improves the roof's resistance to wind uplift, the force of wind trying to lift the roof off, in hurricane conditions. That's worth weighing next to its insulating role when you're deciding whether foam goes at the roof or somewhere else.
South Carolina requires a current license or registration for residential specialty contracting, which covers trade work for a property owner when the job is over $500. The state's specialty registration covers putting in insulation for temperature or sound control. It leaves out foam used as an exterior roofing material, so foam sprayed on top of a roof falls outside it. It's fair to ask anyone bidding your job which license or registration they hold.
Read the product information carefully before you agree to foam. The same consumer safety guidance advises that for anyone with asthma, respiratory allergies, a skin condition or a past reaction to spray foam chemicals. If the risk looks too high for your household, another insulation can do the job instead. That's why I ask about it before we book.
