The median housing unit in Hudson County dates from 1965, and 63.6% of the stock went up before New Jersey’s first statewide energy subcode of 1 January 1978. Age is only half the reason spray foam insulation gets specified so often here. The other half is depth. 19.4% of the county’s units sit in two-unit buildings and 12.7% in three- and four-unit buildings, and above the top floor of most of them is a shallow cavity under a flat or low-slope roof, not a walk-up attic. Where the framing gives you four inches, no amount of fiber reaches a number worth paying for.
Only 9.4% of the county is detached housing, so most of what we spray goes into buildings where the owner occupies one of the floors and holds title to the whole envelope. Gas heats 65.0% of occupied units and electricity 26.7%, which means the savings usually show up on a PSE&G gas bill, and the surfaces that decide that bill — a roof cavity with no room, a rough stone cellar wall, the pockets where floor beams sit in masonry — are the ones foam was made for.
Where spray foam insulation pays in Hudson County houses
The cavity over the top-floor ceiling. Bayonne is 33.7% two-unit buildings and Kearny 27.9%, and in those frame and masonry buildings the roof is flat or nearly so. When there is enough room between the joists and the deck to move, closed cell against the underside of the deck buys the most R-value per inch of anything we carry: R-6.9 to R-7.1, against R-3.9 to R-4.2 for open cell. That turns the cavity into part of the building instead of a vented space nobody can vent properly, and it seals the deck seams in the same pass. Where there is no room at all, foam does not fix it and we say so before quoting.
Sills, rim boards and joist pockets in a masonry cellar. Hoboken is 33.2% pre-1940 and Kearny 36.9%, and the cellars under that era are stone or early block with the floor beams set into pockets in the wall. Every pocket is a hole to the outdoors, and the band of framing above the sill leaks at the concrete, at the subfloor and at each pipe and cable. Closed cell joins sill, rim, subfloor and pocket into one air barrier in a single application, and rim foam up to 3 1/4 inches thick can stay bare when the product meets the code’s density and flame-spread limits.
Cellar walls that rigid board cannot meet. A flat poured wall takes board glued tight with every seam sealed. Rubble stone and old block do not: board bridges the hollows, and the air trapped behind it finds the cold masonry. Foam sprayed onto the wall fills every dip and seals the sill in the same pass. The condition is water. A cellar that wets down in a heavy rain gets that fixed before anything is sprayed, because foam bonded to a wall that floods is money spent twice. Drainage and grading belong to a waterproofing contractor and go first.
Lower levels cut into the Palisades. North Bergen is 16.9% detached with 26.7% of its units from the 1960s and 70s, and its hillside houses put the coldest room underneath: foundation buried at the back, open to the weather at the front, framing where the masonry stops, and often a garage tucked under a bedroom. Closed cell on the exposed run of wall and on the garage ceiling below that bedroom handles the air and the cold in one visit.
Roof decks in gut renovations and low-rise new construction. Secaucus has a median house of 1980 and 31.0% of its units built since 2000, and Jersey City 27.7%. Houses and townhouses of that age put air handlers and ducts above the ceiling and frame cathedral and tray ceilings that never vent cleanly. Foam against the sheathing brings the equipment inside the insulated shell. The code allows an unvented roof when the foam is in direct contact with the underside of the sheathing and the assembly sits inside the thermal envelope, so the material has to go on the deck, never over a layer of old fiber.
How we do spray foam insulation in Hudson County
Old material comes out first. Foam bonds to clean, dry wood or masonry, so batts in a rim bay and anything loose in a roof cavity get bagged under containment and the surface cleared with a HEPA insulation vacuum. Insulation that is wet, settled or fouled by rodents is ours to remove; mold growing on framing or sheathing is a remediation trade and goes to a remediation company before we start. Pebble-like vermiculite stays where it is until a licensed professional has tested it.
Then the surface picks the foam. Closed cell goes on rim boards, joist pockets, stone and block walls, crawl walls and shallow rafters, and at about 1 1/2 inches it also works as a vapor retarder. Open cell suits a deeper cavity and the uneven framing of a pre-war building opened up for renovation; it is vapor-open, so under a roof deck it gets a vapor retarder coating. The crew checks surface moisture and temperature against the product data sheet, sprays a test patch to prove adhesion, keeps every pass inside the manufacturer’s thickness limit, and lays a thin first coat where wiring or plastic pipe runs.
Scheduling is the part that catches owners of small apartment buildings off guard. Everyone leaves while the foam cures and the space is ventilated and cleaned, and re-occupancy is typically 24 hours after professional high-pressure foam. In a three-family sharing one stair, that means the whole building, not one floor, so we set the date with the tenants in the scope rather than the morning of the job, and you get the manufacturer’s re-entry time in writing before we start.
The quote also names the fire protection. Inside living space and in a cellar, foam sits behind a thermal barrier such as 1/2-inch gypsum board. In a roof cavity or crawl space entered only for repairs, an ignition barrier or a foam tested for exposed use is enough, and storing anything up there ends that exception.
What spray foam insulation costs in Hudson County
Most of our projects run between $3,500 and $12,500. Foam is priced in board feet — one square foot one inch thick — so the rim and pockets around one Kearny cellar use a small fraction of what a full roof deck over a Secaucus colonial takes. Closed cell costs more per inch; open cell needs more inches. What is particular to this county is access: hose runs up three and four flights of a narrow rowhouse stair, masking a finished apartment on the floor below the work, and old material coming out of a cavity nobody has opened in decades. Wiring and roof repairs are priced by the trades that do them. The breakdown is on our spray foam insulation cost guide.
Rebates for spray foam insulation in Hudson County
PSE&G bills both the electricity and the gas in every Hudson municipality, so there is one company to deal with rather than two. PSE&G Whole Home Energy Solutions pays up to $7,500 in rebates toward air sealing, insulation and related work, with 0% on-bill repayment of up to $25,000 over 7 years for projects of $10,000 or less and 10 years above that or for income-qualified customers. It starts with a home energy assessment by a BPI-certified contractor participating in PSE&G’s program, who sets that fee; no per-measure amounts are published. Every project has to include air sealing plus the envelope work the assessment calls for, so foam at a rim board or a roof deck counts inside that scope.
The eligibility line is the one to check before anything else here: the program is written for owner-occupied buildings of one to four units. PSE&G’s Whole Home Energy Assessment is the free step, a walk-through with small items installed on the spot for any PSE&G residential customer in a building of fewer than five units. PSE&G Home Weatherization installs insulation and air sealing at no cost for households between 250% and 400% of the federal poverty level, or in a low- or moderate-income tract, or in NJ SHARES. New Jersey Comfort Partners does the same at or below 250% of the federal poverty guidelines, $82,500 a year for a family of four in 2026, and reaches buildings of 1 to 14 individually metered units. Ask any installer, including us, whether they participate in the program you choose. New Jersey’s IRA Home Energy Rebates are still in development and not open for applications, and the federal 25C credit ended for anything placed in service after 31 December 2025. The rest is in our New York and New Jersey rebate guide.
Code and climate in Hudson County
Hudson County is climate zone 4A, the milder of New Jersey’s two zones. The state adopted the 2024 IECC on 17 August 2026, which sets R-49 ceilings for 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 a zone 4 county. 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 a Hudson roof deck usually gets closed cell or foam with fiber under it. Where fiber goes under the foam, the foam alone has to reach R-15 in zone 4A.
Below grade the zone 4 numbers are lower than most people expect: R-10 continuous or R-13 cavity on a basement or crawl space wall, which is about 1 1/2 inches of closed cell. Existing buildings fall under New Jersey’s Rehabilitation Subcode, so foaming a rim board or a roof cavity does not oblige you to bring the rest of the building to current code and does not call for a blower-door test. Blown-in and batt insulation against the interior finish counts as ordinary maintenance; foam plastic is filed work, and we file it as part of the job.
Towns we serve in Hudson County
We spray foam across all twelve Hudson municipalities; these six have their own pages.
Common questions about spray foam insulation in Hudson County
Who installs spray foam insulation near me in Hudson County?
We do, with our own crew out of New Rochelle, in Jersey City, Bayonne, North Bergen, Hoboken, Kearny and Secaucus. Nothing goes to a subcontractor. Before quoting we open the cavity over the top-floor ceiling, look at the rim and the joist pockets in the cellar, check the wiring and the water line on the foundation, and tell you where foam earns its price and where blown-in or batts would do the same job for less money.
Closed cell or open cell spray foam for a Hudson County building?
Closed cell for almost everything below the top floor: rim boards, joist pockets, stone and block cellar walls, crawl walls and shallow roof framing, where R-6.9 to R-7.1 per inch and its vapor resistance both matter. Open cell, at R-3.9 to R-4.2 per inch, fits a deeper roof cavity and the irregular framing of a pre-war building opened for renovation, and under a roof deck it takes a vapor retarder coating. Most buildings here end up with both, in different places.
How much does spray foam insulation cost in Hudson County?
Most of our projects run between $3,500 and $12,500. Sealing the sill, rim and joist pockets of one cellar sits near the bottom; a full roof deck sits near the top. The drivers are board feet of foam, closed against open cell, how many passes the thickness takes, the fire protection the code calls for, stair and parapet access, and whether old material has to come out first. A PSE&G Whole Home project can carry rebates when the foam is part of the scope.
Is rigid foam insulation better than spray foam in a Hudson County cellar?
It depends on what the wall is made of. Board glued flat to a poured concrete wall with every seam sealed is sound work and costs less. The rubble stone and uneven block under the county’s pre-1940 buildings leave hollows behind a sheet of board, and the air in those hollows reaches the cold wall anyway. Sprayed foam fills the irregularities and seals the sill in one pass. At the rim and the joist pockets, spray foam is the stronger choice on any foundation.
Free energy audit in Hudson County
The walk-through starts at the top: how much room the cavity over the top-floor ceiling actually holds, the stair bulkhead, the parapet and any skylight curb. Then the cellar, where we check the rim, the sill, the beam pockets, the foundation material and how high the water has been. We note the wiring and whether ducts or an air handler sit outside the insulated shell, then write down where foam belongs, where a cheaper material does the same work, what other trades have to do first, and what our part costs.
Call 914-554-2289, 8am–8pm, seven days. The Home Insulators is family-owned, works out of New Rochelle, NY, and sends its own 100-plus-person in-house crew; we never subcontract.
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