Attic insulation is the first work most Burlington County houses need and the cheapest square footage in the building to fix. The county’s median housing unit dates from 1977, 55.7% of its 185,617 units went up before 1980, and the biggest single cohort, 17.5% of everything here, was built between 1970 and 1979. Whatever went over those ceilings fifty years ago has been settling ever since, and in most of the attics we open it is three or four inches of loose fill lying level with the tops of the joists. If yours looks like that, it is below half of what the state considers right.
The shape of the houses matters as much as their age. 64.4% of county units are detached and the dominant forms are the ranch, the split and the tract colonial, which means long low attic planes, short headroom at the eaves and, in a split, two or three separate attics rather than one. Utility gas heats 70.0% of occupied homes, but 19.1% run on electricity and 7.2% on oil, and in the electric-heated houses of Delran at 23.7% and Burlington Township at 21.5% the ceiling is where the meter spins fastest.
Where attic insulation pays in Burlington County houses
The Levitt ranches and splits. Willingboro is the clearest case in New Jersey: 87.1% of its units are detached, 51.2% were built in the 1960s alone, 61.4% in the 1960s and 70s, and 90.2% before 1980. The township is laid out in sections called parks, and the same handful of house plans repeats through all of them, which means the same attic repeats too — a shallow plane with the ceiling joists running one way, a hatch with no gasket, open partition tops and loose fill that has drifted away from the eaves. Fix that plane properly and the whole house changes.
1960s ranches on the river side. Cinnaminson built 33.8% of its housing in the 1960s and 43.5% across the 1960s and 70s; Delran is 46.3% of the same era with 24.5% from the 1970s. These attics reward baffles more than depth: with no vent chute at the soffit, the outer two or three feet of insulation is wind-washed all winter, which is why a back bedroom in one of these ranches stays cold whatever the thermostat is set to.
Attics with the heating system in them. Mount Laurel at 54.4% and Evesham at 48.9% are the county’s 1980s and 90s townships, and Burlington Township added 31.0% of its stock in the 1990s. Those builders put air handlers and trunk ducts in vented attics, above the insulation and outside the insulated house. Blowing more fiber over the ceiling of such an attic helps the ceiling and does nothing for the equipment, so the choice is to seal and properly bury the duct runs or to move the insulation up to the roof deck and bring the attic inside.
Plaster ceilings and open stud bays. Moorestown is 23.8% pre-1940 against 10.7% countywide. In houses that old the stud bays can run open from the cellar to the attic floor, so the first job up there is blocking those bays, not adding depth. Lath and plaster ceilings sag under weight, which is where blown fiberglass beats the heavier cellulose, and porcelain knobs and tubes get an electrician before anything is blown.
Pinelands attics and no attic at all. Pemberton Township is 47.6% 1960s and 70s housing with 6.1% manufactured homes, whose shallow roof cavities take what they can hold rather than a code depth. Medford, 35.9% from the 1960s and 70s, has whole streets of contemporaries whose cathedral ceilings leave no attic floor to insulate; that work happens in the rafter bays instead.
How we do attic insulation in Burlington County
The order never changes: seal, baffle, then insulate. Fiber does not stop air, so a house with full depth over open top plates still runs cold on a windy night. We seal the wall tops and dropped soffits, the chimney or flue chase with metal flashing, high-temperature sealant and a dam holding insulation back — an inch of clearance from a metal flue, two inches from a masonry chimney — the plumbing and wiring penetrations, recessed lights, and the hatch or pull-down stairs. Bath fans have to end outdoors; the code bans exhausting one into an attic, a soffit or a ridge vent, and a fan blowing into the insulation is why that patch is wet.
Baffles go in at every rafter bay so the soffit vents keep their air path and the new material is not wind-washed at the edge. Then depth. Blown cellulose reaches R-49 at about 15 inches blown, settling to 13 1/2; blown fiberglass takes 16 3/4 inches on one manufacturer’s chart and about 20 1/4 on another. Cellulose suits a low roof where inches are scarce; fiberglass suits old or sagging ceilings where weight is the worry. Either way the crew fixes depth markers to the framing, at least one for every 300 square feet, and leaves a card stating installed and settled thickness, settled R-value and the number of bags, so the job can be checked after we leave.
Old material stays only if it is dry and clean; once the leaks under it are sealed it goes back in place. Wet, settled or rodent-fouled insulation comes out under containment and leaves in bags, and the reason it got wet gets fixed first. Mold on rafters or sheathing is a remediation trade and belongs to a remediation company before we insulate. Pebble-like gray-brown or silver-gold fill may be vermiculite; it stays where it is until a licensed professional tests it.
What attic insulation costs in Burlington County
Most of our projects run between $3,500 and $12,500. Ceiling area sets the floor of the price and everything else moves it: how many separate attic planes a split-level has, how many bypasses have to be sealed before a single bag is blown, whether old insulation has to be removed and hauled, how much headroom the crew has at a low Willingboro eave, and whether ductwork or an air handler is in the scope. A dense-packed knee wall or a foamed roof deck costs more than a straight blow across an open floor. Our insulation cost guide breaks the pieces down.
Rebates for attic insulation in Burlington County
Which utility runs your project depends on which names are on your bills. PSE&G supplies gas and electricity in Burlington Township, Cinnaminson, Delran, Moorestown, Mount Laurel and Willingboro. Pemberton Township takes its electricity from JCP&L and its limited gas service from PSE&G. Evesham and Medford straddle two lines apiece: PSE&G or Atlantic City Electric for electricity, South Jersey Gas or PSE&G for gas. When the two bills carry different names, either program can take the job, and the sensible starting point is the company that bills the fuel doing the heating.
All four run Whole Home Energy Solutions, which pays on a project, not on a product: air sealing plus the insulation the assessment calls for, which is exactly how an attic job is built anyway. PSE&G provides up to $7,500 in rebates and 0% on-bill repayment of up to $25,000, beginning with an assessment by a BPI-certified contractor participating in its program, who sets the assessment fee. JCP&L and South Jersey Gas publish their arithmetic — $2,000 at a modeled 5% saving, $200 for every point above that, capped at $7,500 and at half the project cost — and each adds 0% financing of $2,500 to $25,000. Atlantic City Electric pays up to $7,500 on single-family residences and finances through the program’s lender. PSE&G, JCP&L and South Jersey Gas each offer their own residential customers a free Whole Home Energy Assessment, a short walk-through that installs small items and points you at the rebates. Ask any contractor you interview, this one included, whether they participate in the program you plan to use.
Households at or below 250% of the federal poverty guidelines — $82,500 for a family of four in 2026 — can get the work at no cost through New Jersey Comfort Partners, though oil, propane and kerosene homes go to the state’s weatherization office instead, which is worth knowing in Pemberton Township, where 17.7% of homes burn oil. The utilities’ own weatherization programs cover income-qualified households between 250% and 400% of the federal poverty level. New Jersey’s IRA Home Energy Rebates are not open; the state still lists them as in development. The federal 25C credit ended for work placed in service after 31 December 2025, so ignore any 2026 flyer that offers it. See our New Jersey rebate guide.
Code and climate in Burlington County
Burlington County sits in climate zone 4A. New Jersey adopted the 2024 IECC on 17 August 2026, and it sets R-49 at the ceiling for new construction; the 2021 edition it replaced asked for R-60. R-49 is the number we design to in existing attics as well. For a house that already has three or four inches up there, adding R-49 on top is the recommended target, and an uninsulated attic is better taken to R-60.
Two code details decide how an attic job is written. The energy code allows R-38 to count as R-49 only where the full uncompressed depth carries over the top of the exterior wall, which in a low-slope Willingboro or Cinnaminson ranch it usually cannot, so the eave gets treated separately. And in this zone unfaced batts behind painted drywall are accepted where batts are used at all, with no polyethylene in the assembly. Existing houses fall under New Jersey’s Rehabilitation Subcode: insulating an attic does not drag the rest of the house up to current code and does not require a blower-door test. With 55.7% of the county built before the state’s first statewide energy subcode of 1 January 1978, most of these ceilings began with no requirement at all.
Towns we serve in Burlington County
Our crews work attics across all 40 Burlington municipalities. These nine have their own pages.
Common questions about attic insulation in Burlington County
How much does attic insulation cost in Burlington County?
Most of our projects run between $3,500 and $12,500. A single open ranch attic in Willingboro or Cinnaminson, air sealed and blown to R-49, sits at the low end. The number climbs with removal of old settled fill, a split-level’s several separate attics, knee walls that have to be dense-packed, ductwork in the scope, and tight eaves that slow the crew down. We price the sealing and the insulation as one job, because a depth quoted without sealing is half a job.
Blown-in cellulose or fiberglass for a Burlington County attic?
Both reach R-49; they differ in depth and weight. Cellulose is denser per inch, so it hits the target in about 15 inches blown settling to 13 1/2, which suits the low roofs over the county’s 1960s ranches. Blown fiberglass needs more inches but weighs far less, which matters over the lath and plaster ceilings in Moorestown’s pre-1940 houses. Both need baffles at the soffits and metal dams at flues, and both are only as good as the air sealing underneath them.
Who are the attic insulation contractors near me in Burlington County?
We are, with our own 100-plus-person crew and no subcontractors, working from Willingboro and Delran out to Medford and Pemberton Township. An estimate starts in the attic with a tape and a flashlight: depth and condition of what is there, the state of the eaves and baffles, open chases and partition tops, the hatch, the bath fan ducts, and whether an air handler is up there. You get a written scope naming both the sealing and the finished R-value.
Can you deal with attic mold in a Burlington County house?
Partly, and the distinction matters. We remove wet, settled or rodent-fouled insulation under containment and haul it away, and we fix the causes that belong to us, such as a bath fan venting into the attic or missing baffles that let humid air condense on cold sheathing. Mold growing on the rafters or the roof sheathing itself is remediation work for a remediation company, and a roof leak is a roofer’s. We insulate once the attic is dry and clean.
Free energy audit in Burlington County
In a ranch or a split we walk every attic plane, not just the biggest one, and measure what is there against what it should be. We check the eaves, the hatch, the partition tops, the chases, the bath fan ducts, the flue clearances and any equipment above the ceiling, and we look for the dark, dirty streaks in old fiber that mark where house air has been filtering through it for years. Then you get a written scope and a price, with no charge and no obligation.
Call 914-554-2289, 8am–8pm, seven days. The Home Insulators has been family-owned since 2015, works out of New Rochelle, NY, and sends its own 100-plus-person in-house crew; we never subcontract.
Get my free estimateor call 914-554-2289, 8am–8pm every day