The Home Insulators

Insulation Contractors in Hackensack, NJ

Half of Hackensack lives in a tower. 49.5% of the city’s 21,405 housing units, the largest stock of the fifteen Bergen County towns on this site, are in buildings of twenty or more, 7,378 of them in buildings of fifty-plus. Those are board work, a capital plan for a whole building, and not what this page is about.

This page is for the other half: the early-1900s brick and clapboard houses of Fairmount and Hackensack North, the two-families and garden apartments, the 1960s and 70s ranches and splits on the west side, and the landlord who owns much of it. Only 38.4% of Hackensack’s units are owner-occupied, so the person we usually need to convince is not the person feeling the draft.

The houses we insulate in Hackensack

The median Hackensack unit was built in 1967, younger than Paramus, for a county seat with a 1696 church on its green. 16.5% of the stock predates 1940, 19.8% is 1940s and 50s, 36.1% is 1960s and 70s, 17.4% is 1980s and 90s and 10.2% has been built since 2000; 72.5% predates 1980, though the 1960s and 70s share is swollen by the towers. By structure the city is 22.8% detached, 2.3% attached, 12.9% in two- to four-family buildings, with 2,047 units in two-unit buildings, 12.4% in buildings of five to nineteen and 49.5% in twenty-plus. Gas heats 52.5% of units and electricity 37.9%, the highest electric share of the fifteen, and again that is largely the towers.

The detached market is Fairmount and Hackensack North on the west side, where single-family neighborhoods take up about a third of the city’s area. Along Fairmount and Prospect Avenues the houses are early-1900s brick and clapboard; on Summit Avenue they are the colonials and Craftsman bungalows of the same decades. The clapboard ones are balloon-framed: stud bays open from the sill to the attic, plank sheathing, no wall insulation, a brick or rubble foundation with a leaky rim. We block the plates and dense-pack. The brick ones split two ways, veneer over frame that can be filled from inside or through the mortar joints, and solid masonry that cannot be filled at all, and we find out which before anyone quotes a wall. Knob-and-tube is the default assumption in either until the electrician clears it. Hackensack has no registered historic districts, so there is no district review to work around.

Then the two-families and garden apartments. An up-and-down two-family from the 1910s to 50s has a shared stair chase, a low-slope roof over the top unit, one heating plant in the cellar and, in the older ones, balloon-framed side walls. A garden apartment has a low-slope roof, party walls, a boiler room and a rim. Each is one envelope, and with 38.4% owner-occupancy the decision-maker is usually a landlord, so we write the scope to make sense to the person who signs and the person who pays the heat.

The 1960s and 70s ranches and splits on the west side have some insulation, which is the problem: a few inches of settled loose-fill, wind-washed at the eaves, over a long low attic of unsealed bypasses, a cantilever and a bedroom over the garage. Sealing those bypasses and bringing that attic to a modern depth is the cheapest work in the city.

The river is tidal and the low streets along it flood. Ida put up to five feet of water into the Madison Arms apartments in September 2021, and Sandy’s surge in 2012 devastated the Meadowlands towns immediately south. In a basement or garage level that has flooded we do not put closed cell foam on the wall; we seal and insulate the floor deck above it and replace the batts that fell from the joist bays.

Half of Hackensack is in a tower, and that is board work

After 1956 the city rezoned itself for high-rise apartments, and the Prospect Avenue towers went up through the 1960s and 70s. Downtown has since added more than 3,500 new apartments, with about 4,000 projected. A tower’s envelope is masonry or curtain wall, its heating and cooling come through a wall sleeve in each unit, there is no attic to seal, and the envelope belongs to a board or an owner making capital decisions for the whole building. The new downtown buildings were built to current codes and are not a retrofit either. If you own or rent a unit in one of these, the useful call is to the board or the property manager, not to us.

The 2,047 units in two-unit buildings, the small garden apartments and the 22.8% of units that are detached houses are a different matter. Those have attics, rims, stair chases and party walls, and an owner who can say yes. That is the Hackensack we work in.

We seal before we insulate

Insulation slows heat moving through a surface. It does nothing about air moving through a gap. Pack a leaky attic with cellulose and you have a leaky attic with cellulose in it.

In a Hackensack two-family the sequence starts in the cellar, where the one heating plant and the worst leaks are: the rim joist, the chase where the flue and pipes rise, the top of the foundation wall. Then the stair chase at each floor and the floor cavity between the units, so the building stops working as one tall flue. Then the top plates and the stack at the roof. Only then the insulation: dense-pack the balloon-framed walls and the low-slope roof over the top unit, never vented batts, and finish with the cellar ceiling and rim.

If a quote specifies a depth of insulation and never mentions air sealing, it is half a job.

What insulation costs in Hackensack

Most of our projects run between $3,500 and $12,500. A two-family is priced as one building, not two apartments, because the stair chase, floor cavity and roof are shared; the drivers are the roof area over the top unit, the count of wall bays to block and dense-pack, and how reachable the cellar and rim are around the boiler. A Fairmount colonial with balloon-framed walls sits toward the upper end; a 1960s split whose real work is the attic sits nearer the lower. Our Hackensack spray foam cost page has more detail.

Open cell foam runs R-3.9 to R-4.2 per inch. Closed cell runs R-6.9 to R-7.1 per inch and also acts as a vapor retarder, which is why it costs more and why it is right in some assemblies and unnecessary in others. All products are manufactured in the United States and meet applicable building code and safety standards. ENERGY STAR says sealing air leaks and adding insulation can save up to 10% on annual energy bills.

Insulation rebates in Hackensack

Hackensack is PSE&G territory for both electric and gas, and in a city where only 38.4% of units are owner-occupied the no-cost programs below carry more weight than the rebate.

The live money is PSE&G Whole Home Energy Solutions: up to $7,500 in rebates toward air sealing, insulation and related work, plus 0% on-bill repayment of up to $25,000 over 7 or 10 years. It starts with PSE&G’s home energy assessment, and the work must be done by a BPI-certified contractor participating in PSE&G’s program. PSE&G does not publish what each measure pays, so “up to $7,500” is as precise as anyone can be.

PSE&G’s Whole Home Energy Assessment is free for any PSE&G gas or electric customer, once a year. PSE&G Home Weatherization installs insulation, air sealing and duct sealing at no cost for households above 250% and below 400% of the federal poverty level. New Jersey Comfort Partners does the same at no cost for households at or below 250% of the federal poverty guidelines, $82,500 for a family of four, and refers homes heated with oil or propane to the state weatherization office.

The New Jersey IRA Home Energy Rebates have not launched. The state’s page says “under development,” so they are not available yet.

The federal Section 25C tax credit ended for anything placed in service after 31 December 2025. There is no federal insulation credit on a 2026 job. The full picture is in our New York and New Jersey rebate guide.

Code and climate in Hackensack

72.5% of Hackensack’s units went up before 1980, and the Fairmount houses and the west-side splits alike predate New Jersey’s first statewide energy subcode of 1 January 1977. Bergen County is climate zone 5A; Essex, Hudson and Union next door are 4A.

New Jersey adopted the 2024 IECC on 17 August 2026. For new construction it sets R-49 ceilings — the 2021 edition it replaced called for R-60, and a permit application filed under the old code is still accepted for six months, until about mid-February 2027 — with walls at R-20 plus R-5 continuous, windows at U-0.28, and air leakage of 3.0 air changes per hour at 50 pascals. Existing homes fall under New Jersey’s Rehabilitation Subcode: insulating an attic does not require bringing the rest of the house to code and does not require a blower-door test. Blown-in or batt insulation installed against the interior finish is ordinary maintenance with no permit; spray foam and other foam plastic insulation need a permit, which we pull as part of the job. R-49 is the number the state considers right for this climate, and it is what we design to.

Common questions about insulation in Hackensack

Do you install insulation in Hackensack, NJ?

Yes, in the houses and the small buildings, not the towers. That means the early-1900s brick and clapboard houses of Fairmount and Hackensack North, the up-and-down two-families and garden apartments, and the 1960s and 70s ranches and splits on the west side. Half the city’s units are in buildings of twenty or more, and those are board decisions, not something we will sell you for one apartment.

How much does insulation cost in Hackensack?

Most projects run $3,500 to $12,500. A two-family is priced as one building; the drivers are the roof area over the top unit, the number of wall bays to block and dense-pack, and cellar access around the boiler. A balloon-framed Fairmount colonial sits toward the upper end, and a 1960s split whose real work is the attic sits nearer the lower. Knob-and-tube removal is an electrician’s cost ahead of ours.

Are there insulation rebates in Hackensack?

Hackensack is PSE&G territory for gas and electric. PSE&G Whole Home Energy Solutions offers up to $7,500 in rebates plus 0% on-bill repayment of up to $25,000, and it starts with a PSE&G home energy assessment. Comfort Partners and PSE&G Home Weatherization do the work at no cost for income-qualified households. New Jersey’s IRA rebates have not launched, and the federal 25C credit ended for anything placed in service after 31 December 2025.

I own a Hackensack two-family and rent out both units. Is insulation worth it for a landlord?

Usually, and as one building either way. The stair chase, the floor cavity and the roof run through both units, so sealing one apartment leaves the leak path intact. If you pay the heat, the savings are yours; if the tenants do, you are fixing the complaints, and the blocking between floors restores fire and combustion-gas separation. The no-cost programs, Comfort Partners and PSE&G Home Weatherization, are worth checking for any household in the building that meets the income lines.

Free energy audit in Hackensack

We walk the cellar and the boiler room, the stair chase, the top-floor ceiling or attic, and the rim, then give you a written scope and a price. No charge, no obligation. For a landlord who is not on site we can walk it with your tenant or your manager and send the scope to you.

Call 914-825-6824 or use the form on this page. Open 8am–8pm, seven days. We work out of New Rochelle, NY with a 100-plus in-house crew.

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