Closed-cell foam insulation in Memphis TN - walls sealed against air and moisture
Drafty walls or a cold floor over the crawl space? Closed-cell foam seals the air leaks and blocks moisture with one rigid layer.
What does closed-cell foam do for a Memphis house?
Closed-cell foam insulation is spray foam that sets into a dense, rigid layer, and in Memphis homes we use it where a wall, rim joist or crawl space needs to be insulated, sealed against air leaks and kept dry all at once. At normal thickness it blocks moisture vapor, so one material does the work of insulation and a vapor barrier.
Most calls about closed-cell foam start with a wall that feels drafty, a cold floor over a damp crawl space, or another contractor's quote that says foam everywhere. Closed-cell costs more than other insulation, so the first thing I ask is whether your problem is moisture or just air leaking in, because plenty of houses only need air sealing and a top-up. The price moves with how many square feet you're covering, how thick the foam goes, how hard the space is to reach and whether old insulation has to come out first. The schedule turns on that same size and access, plus the stretch your house sits empty while the foam cures. Your on-site estimate puts your own number on it.
How we install closed-cell foam insulation
On a closed-cell job I start by looking at where the foam would go and telling you whether it's worth it there, because closed-cell costs more and only earns that where its rigid, moisture-blocking layer matters. If it isn't the right fit, I say so and point you to something cheaper. Before any foam goes in, we pull out insulation that's wet, moldy or full of droppings, since foam sprayed over a problem just hides it. On spray day our installers cover the rest of the room, spray the foam in passes, trim anything that sticks out past the framing and clean up before the house is aired out.
If a spot doesn't need moisture control, open-cell foam insulation is the softer, cheaper spray foam and fills the same cavity for less. Property managers and building owners can call us for commercial insulation, where we weigh closed-cell against the alternatives the same way.
Closed-cell through the whole wall
This suits frame walls that are open for a remodel or new build, where you want the most insulation and moisture control in a thin space. It's the most expensive way to do it, so we save it for walls where moisture is a real concern.
A closed-cell layer with other insulation
A thinner coat of closed-cell seals the air and handles moisture at the outside of the wall, and a cheaper insulation fills the rest. It suits owners who want the moisture control without paying for foam the full depth of the cavity.
Closed-cell foam insulation and the rules in Memphis
Whether your closed-cell job needs a building permit is a question for Construction Enforcement, the office that issues construction permits and inspects building work in Memphis, Germantown and unincorporated Shelby County against the state's building code. When your job calls for a permit, we handle the application and set up the inspections with the city or county office that covers your address.
Our summers are long and humid, and that shapes how a foamed wall gets built. Guidance written for hot, humid climates rates closed-cell as the preferred choice for frame walls because it air seals the wall and controls moisture at the outer side, and it says those walls should leave out any vapor retarder on the inside, since a second layer can trap moisture in the wall. The same guidance says the outside of the wall needs a way to dry if a leak ever soaks the sheathing boards under your siding, so before we spray I check how your wall is built and whether it can dry outward. We're based in Memphis and work across the cities around it in Tennessee, Mississippi and Arkansas, and we look at walls the same way on jobs in Bartlett.
Closed-cell foam up close
Why call us for closed-cell foam
I do every estimate myself
I come out, look at the walls, crawl space or attic, and give you the estimate in person, and our installers do the work. The person telling you whether closed-cell is worth the money has actually seen your house.
Heating and cooling before insulation
I spent years in heating and cooling before I started this business in 2021, so I check the furnace, water heater and fresh air before we seal anything. A tighter house still has to be safe to breathe in, and that comes first.
Licensed and insured, proof on request
We're licensed and insured. Ask to see proof at the estimate, because anyone spraying foam inside your house should be able to show it.
Booked around Memphis humidity
Temperature and humidity play a big part in how spray foam cures, and our summers run hot and sticky. We go over the time of year with you, and the foam maker's guidance, before we put a date on the calendar.
If you're weighing closed-cell against a cheaper option, let me look before you spend the money. Request an estimate or call (901) 203-1514.
(901) 203-1514Get your closed-cell foam estimate
We reply to every call and message within one business day, and I'll set a time to come out and give you a free estimate at your property. There's no obligation, and you'll know whether closed-cell is the right foam for your house before you decide anything.
Closed-cell foam questions from Memphis homeowners
Is closed-cell foam worth the extra cost over open-cell foam in Memphis?
It's worth it where you need moisture control along with insulation, and usually not otherwise. Closed-cell costs more to install mainly because it takes more material to fill the same space, and what you get for that is a rigid foam that also blocks moisture vapor. If a spot only needs insulation and air sealing, the cheaper foam usually does the job.
How much does closed-cell spray foam insulation cost in Memphis?
Closed-cell spray foam in Memphis usually costs about $2,600 to $4,000 to cover 1,000 square feet at 3 inches thick. That's the going rate around here, not our quote, and thickness, access and any old insulation that has to come out move your number. If your household's income qualifies, TVA's Home Uplift program, run with MLGW in its service area, provides free improvements that include attic and wall insulation.
How long do I have to stay out of the house after spray foam?
Plan on a night away, because guidance says everyone should leave while spray foam goes in and stay out until it has cured and the house has been aired out and cleaned. Some makers recommend 24 hours before people return for professional spray systems, though it can vary by product. We tell you the re-entry time for the foam we're using, the point when you, the kids and the pets can come back, before we book the day.
How do I seal and insulate rim joists in my crawl space or basement?
Spray foam seals rim joists against air leaks and insulates them in the same step. Closed-cell needs a thinner layer than open-cell to count as an air barrier, which helps on the rim joist, the board that sits on top of your foundation wall. It's often worth doing while we're already set up to spray.
Is closed-cell spray foam insulation flammable?
Closed-cell and open-cell spray foam are both made from organic materials and are considered combustible. That's one more reason I look at the furnace, water heater and anything else with a flame before we decide where foam goes.
How do I check whether a spray foam installer is trained and certified?
Ask about the training and certification of the project manager and the installers before any work starts. Installers certified by the Spray Polyurethane Foam Association carry wallet-sized cards showing they passed testing, so asking to see one is a fair question for any crew.
Find out if closed-cell foam fits your house
Call (901) 203-1514 and name the walls, attic or rim joists you want done, so I come out ready to price each one.
