Spray foam insulation earns its price in three situations: where air sealing and R-value have to happen in the same few inches, where the surface is too rough or too damp for fiber, and where the insulation has to move from the attic floor up to the roof. Burlington County supplies all three in volume. 64.4% of the county’s 185,617 housing units are detached houses, another 14.5% are townhouses and duplex halves, and 55.7% of the stock was framed before 1980, when insulation was still whatever the builder chose to put in.
Fuel decides how fast that work pays for itself. Utility gas heats 70.0% of occupied homes, electricity 19.1% and fuel oil 7.2%, and the expensive fuels sit where the gas mains stop: Pemberton Township burns oil in 17.7% of its homes and heats 23.4% with electricity, and Medford is 7.0% oil. In those houses a few hundred square feet of foam at the right surfaces changes the winter bill more than a full attic of fiber does.
Where spray foam insulation pays in Burlington County houses
Rim joists under the ranch-and-split belt. The county’s largest cohort is the 1960s and 70s at 31.2%, and it lands hardest in Willingboro at 61.4%, Pemberton Township at 47.6%, Delran at 46.3% and Cinnaminson at 43.5%. In all of them the band of framing on top of the foundation leaks at the sill, at the subfloor and at every pipe and cable hole, and it is usually bare or packed with a loose batt that lets house air touch cold wood. Closed cell sprayed there joins foundation, sill, rim and subfloor into one air barrier. It can stay exposed with no drywall over it up to 3 1/4 inches thick, at 0.5 to 2.0 pounds per cubic foot, with a flame spread index of 25 or less and a smoke-developed index no higher than 450 — about R-22 to R-23. It is the smallest foam job we do and usually the first one we quote.
Roof decks over attic air handlers. Mount Laurel put 54.4% of its housing up in the 1980s and 90s, Evesham 48.9% and Burlington Township 36.8%, with 31.0% of Burlington Township dating from the 1990s alone. Builders in those years routinely set the air handler and the trunk duct above the ceiling insulation in a vented attic. Foam on the underside of the sheathing brings that equipment inside the insulated house. The code allows that unvented attic when the foam sits in direct contact with the roof sheathing and no Class I vapor retarder lies on the attic floor.
Cathedral slopes with nowhere to vent. Medford built 27.2% of its houses in the 1970s and 34.1% in the 1980s and 90s, the decades of the contemporary whose ceiling follows the rafters. A cathedral bay holds drywall, insulation and roof with no attic above, so fiber alone leaves no drying path, and getting into it means a reroof or a gut renovation. Where depth runs out, the energy code accepts R-30 over 500 square feet or 20% of the ceiling area, whichever is less.
Crawl space and foundation walls in the Pinelands. Out toward Browns Mills, Country Lake Estates and Presidential Lakes Estates in Pemberton Township, and through the lake settlements of Medford, houses sit on block crawl walls in sandy ground. Fiber should not be used against a crawl space wall, because it collects and holds moisture; closed cell insulates and seals rough block in one pass, and about 1 1/2 inches of it meets the R-10 of continuous insulation the code asks for on those walls.
Opened walls in the river towns. Moorestown is 23.8% pre-1940, more than double the county’s 10.7%. Those houses are often balloon-framed, with stud bays running from the sill to the attic floor and framing no batt ever fit. When a floor is gutted, open cell fills the irregular bays and stops air climbing them. Anything live on porcelain knobs and tubes is an electrician’s job before foam goes near it, and pebble-like fill that may be vermiculite stays undisturbed until a licensed professional tests it.
How we do spray foam insulation in Burlington County
Foam bonds to clean, dry wood or masonry, so nothing gets sprayed over old material. Wet, settled or rodent-fouled insulation comes out first under containment, and the surface is cleared with a HEPA vacuum. Mold growing on framing or sheathing is a remediation trade, and it gets handled before we schedule foam rather than sprayed over.
Then the foam is matched to the surface. Closed cell, R-6.9 to R-7.1 per inch, goes on rim joists, block and stone foundations, crawl space walls and shallow rafters, and at about 1 1/2 inches it also acts as a vapor retarder. Open cell, R-3.9 to R-4.2 per inch, suits deeper roof decks and the uneven framing of an old house opened up for work. Open cell is vapor-open, so under a roof deck in Burlington County it gets a vapor retarder coating.
On the day, the crew masks finished surfaces, shuts down heating and cooling in the work area and checks the wood for moisture and the air against the dew point before a single pass goes on. The foam is applied in passes inside the product’s thickness limit and the depth is measured as the work moves. Everybody else stays out until it has cured and the space has been ventilated and cleaned — plan on a day, and we hand you the manufacturer’s re-entry time before we start.
Every quote names the fire protection the foam needs. In finished rooms and basements that is a thermal barrier such as 1/2-inch drywall, hung by the finishing trade. In an attic or crawl space entered only for repairs, an ignition barrier or a foam tested for exposed use is enough. Turn that crawl space into storage and the full barrier comes back.
What spray foam insulation costs in Burlington County
Most of our projects run between $3,500 and $12,500. Foam is priced in board feet — a square foot one inch thick — so the number follows surface area times depth. Sealing the rim joists of one Cinnaminson ranch takes a small fraction of the material in an R-49 roof deck over a Mount Laurel colonial. Closed cell costs more per inch while open cell needs more inches; rough block and stone drink more foam than flat poured walls; and old insulation removal, the fire barrier and low crawling access under a Pinelands house all move the price. Wiring, roofing and drywall are priced by the trades that do them. The breakdown is in our spray foam insulation cost guide.
Rebates for spray foam insulation in Burlington County
Six of the nine towns listed below take both bills from PSE&G: Burlington Township, Cinnaminson, Delran, Moorestown, Mount Laurel and Willingboro. Pemberton Township buys electricity from JCP&L, with PSE&G gas reaching only a small corner of the township. Evesham and Medford are divided twice over, electricity between PSE&G and Atlantic City Electric and gas between South Jersey Gas and PSE&G. Where two companies appear on two bills, either one’s program can carry the project; start with whichever utility bills the fuel that heats the house, since the gas programs require gas heat.
The money comes through Whole Home Energy Solutions, which pays for a whole-house scope rather than a product, so foam at a rim joist or a roof deck counts when it sits inside a project that includes air sealing and the insulation the assessment calls for. PSE&G pays up to $7,500 and adds 0% on-bill repayment of up to $25,000, starting with an assessment by a BPI-certified contractor participating in its program, who sets that fee. JCP&L and South Jersey Gas both publish the formula: $2,000 for a modeled 5% energy saving plus $200 for each point above it, capped at $7,500 and at half the project cost, with 0% financing of $2,500 to $25,000 behind it. Atlantic City Electric pays up to $7,500, finances through the program’s lender rather than the bill, and takes single-family residences only. Ask any installer, including us, whether they participate in the program you choose.
Income-qualified households can have the work done outright, through PSE&G Home Weatherization or the $14,000 weatherization programs at JCP&L, South Jersey Gas and Atlantic City Electric. New Jersey Comfort Partners serves households at or below 250% of the federal poverty guidelines, $82,500 for a family of four in 2026, though homes burning oil, propane or kerosene are referred to the state’s weatherization office instead — which matters in Pemberton Township more than anywhere else here. New Jersey’s IRA Home Energy Rebates are not available; the state still describes them as in development. The federal 25C tax credit ended for anything placed in service after 31 December 2025, so no foam job in 2026 carries it. Our New Jersey rebate guide has the rest.
Code and climate in Burlington County
Burlington County is climate zone 4A. New Jersey adopted the 2024 IECC on 17 August 2026, which sets R-49 for ceilings in new construction — the 2021 edition it replaced called for R-60 — walls at R-30 in the cavity or R-20 plus R-5 continuous, air leakage of 3.0 air changes per hour at 50 pascals, and windows at U-0.30 in the zone 4A counties. R-49 takes about 7 inches of closed cell or 11 3/4 to 12 1/2 inches of open cell, and a 2×8 rafter is 7 1/4 inches deep, which is why roof decks here end up closed cell or a hybrid with fiber beneath the foam. In a hybrid on this side of the state the foam alone has to reach R-15 before batts go under it.
On a sealed crawl space or a basement wall the zone 4A numbers are R-10 continuous or R-13 in a cavity, which closed cell reaches in about 1 1/2 inches. Existing houses fall under New Jersey’s Rehabilitation Subcode, so foaming a rim joist or a roof deck does not force the rest of the house up to current code and does not call for a blower-door test. With 55.7% of the county built before New Jersey’s first statewide energy subcode of 1 January 1978, most of the framing we spray was never held to an insulation rule at all.
Towns we serve in Burlington County
We spray foam across all 40 Burlington municipalities; these nine have pages of their own.
Common questions about spray foam insulation in Burlington County
Who installs spray foam insulation near me in Burlington County?
We do, with our own crew and our own rigs, from the Levitt-built ranches of Willingboro to the lake houses of Medford and Pemberton Township. Nothing is handed to a subcontractor. Before we quote, we look at the rim joists, the rafter depth, the crawl walls and the wiring, then say where foam is worth its price and where blown-in fiber or batts would do the same job for less money. Foam is a tool here, not the answer to every room.
Closed cell or open cell spray foam in a Burlington County house?
Usually both, in different places. Closed cell, R-6.9 to R-7.1 per inch, belongs on rim joists, block and stone foundations, sealed crawl space walls and the shallow rafters of a 1960s ranch, and it doubles as a vapor retarder at about 1 1/2 inches. Open cell, R-3.9 to R-4.2 per inch, fits deeper roof decks and the irregular framing of a pre-1940 Moorestown house opened for renovation, and under a roof deck in this county it takes a vapor retarder coating.
How much does spray foam insulation cost in Burlington County?
Most of our projects run between $3,500 and $12,500. A rim joist seal around one basement sits near the bottom of that range and an R-49 roof deck over a large colonial near the top. What moves it is board feet of foam, closed cell against open cell, the fire barrier the code requires, how hard the space is to get into, and whether old insulation has to be removed first. Foam bought as part of a Whole Home project can draw a utility rebate.
Is rigid foam insulation or spray foam better on a Burlington County basement wall?
It depends on how flat the wall is. Rigid board glued in full contact to a poured concrete wall, with every seam sealed, is sound work and costs less. The block and stone under the county’s older river-town houses leaves hollows behind a board, and the air in those hollows finds the cold wall, so closed cell sprayed straight onto the masonry is the better fit there. At the rim joist above either wall, spray foam wins on air sealing whatever the wall below is made of.
Free energy audit in Burlington County
The audit walks the surfaces foam is actually for: the rim joists and foundation walls, the crawl space and its ground cover, the rafters and roof deck, any knee wall and side attic, and whatever mechanical equipment sits outside the insulated shell. We note moisture, wiring and what is already in the bays, then write down where foam goes, where something cheaper does the same work, what has to be fixed first, and what our part costs.
Call 914-554-2289, 8am–8pm, seven days. The Home Insulators is family-owned, has worked out of New Rochelle, NY since 2015, and sends its own 100-plus-person in-house crew to every job; we never subcontract.
Get my free estimateor call 914-554-2289, 8am–8pm every day