Two of every three Fort Salonga homes heat with oil. Fuel oil warms 66.7% of occupied homes, against 27.4% on utility gas, 2.7% on bottled gas and 1.8% on electricity. Nearly all of those homes are houses their owners live in: 97.3% of the hamlet’s 3,477 homes are detached houses, 97.9% are owner-occupied, and the count shows no two-family or three- to four-unit buildings at all.
The houses are mid-century. The median home dates from 1964, 25.5% were built in the 1950s and 24.4% in the 1960s, and 79.4% of the stock went up before 1980. Another 9.6%, 335 homes, predate 1940. Fort Salonga is a hamlet on the North Shore that sits mostly in the Town of Huntington, with a part in the Town of Smithtown. Northport lies to the west and Kings Park to the east, and the hamlet takes in Crab Meadow.
With 97.9% of homes lived in by their owners, the person paying for the work is the person paying for the oil. Every gap sealed means fewer gallons delivered, and what those gallons are worth moves with the price of oil each winter, so we show where a house loses heat rather than promise a payback year.
The houses we insulate in Fort Salonga
The name is older than the houses. The area was called Fresh Pond until a post office opened and needed another name, and it took Fort Salonga from the Revolutionary War British fort, also called Fort Slongo, that stood near the Huntington–Smithtown line overlooking Long Island Sound. After the Civil War the red clay here fed a brickworks: the Brown family’s bricks carried the initials BBB, and their home at the top of the hill on Breeze Hill Road has been the Indian Hills Country Club clubhouse since 1963. The hamlet is counted as the easternmost part of Long Island’s historic Gold Coast, and the Geissler Estate is here.
Whatever they started as, in the 335 houses from before 1940 we assume balloon framing, with stud bays running open from the cellar to the attic, until we have looked. We assume knob-and-tube wiring the same way, and live old wiring comes out before anything is blown into a wall.
The 1940s left 207 homes and the 1950s 886, together 31.4% of the hamlet, and they are mostly capes and ranches. The ranch fails overhead: a long, low attic holding a few inches of loose-fill that has been settling for seventy years, with the oil chimney rising through an open gap, and the bath fan, the plumbing vent and every ceiling light open to it. The cape fails upstairs, at knee walls with no air barrier on the attic side and floor bays that run open to the eave, so outside air moves under the bedroom floors all winter.
The 1960s added 849 homes and the 1970s 483: splits, high ranches and colonials. Their walls hold paper-faced batts fitted loosely around wires and outlets, their attics hold three to six inches that were never sealed underneath, and their rim joists sit bare above the foundation. The 1980s added 302 homes and the 1990s 214, colonials with insulated walls but with the air handler and ducts in a vented attic, recessed lights through the top-floor ceiling and a two-story entry whose upper walls face the attic.
Oil heat adds two items in every era: the chimney gap at the attic floor is closed with sheet metal and high-temperature sealant, never packed with insulation, and once the house is tighter we confirm the burner still drafts.
Lower levels on a slope: the wall that is half basement and half house
Parts of Fort Salonga are hilly, and where a lot slopes, a house often steps down with it. The result is a lower level buried at the back and open to the yard at the front, often finished as a family room. It is really three different assemblies wearing the same paneling.
The buried back wall is block or poured concrete against soil: cool, and damp in a wet spring. The side walls change from buried to exposed as the grade falls away, so part of each wall is foundation and part is a framed wall sitting on a sill. The front is an ordinary framed wall with windows and a door. Running along the top of all three, at head height, is the rim joist: a band of framing and a mudsill with no air seal, open to the outside behind a strip of siding, and usually the single worst spot in the room.
Finished rooms hide it. Paneling or drywall went up on furring strips against the block with thin foam board or nothing behind it, and the rim is concealed above a finished ceiling. Where a utility room or an unfinished ceiling gives access, the rim gets closed cell foam, which seals and insulates in one layer and does not soak up water. Before we recommend anything for the buried walls we check their lower edge for moisture, because insulation that traps water against a foundation makes a damp room worse. A wall that has taken water gets no insulation until the water problem is solved.
We seal before we insulate
Insulation slows heat moving through a surface. It does nothing about air moving through a gap, and in an oil-heated house every draft is cold air the boiler has to warm with delivered fuel.
In a 1950s or 60s Fort Salonga house the order runs from the top down. At the attic floor: the top plates, the chimney gap, the plumbing vents, the ceiling fixtures and the hatch. In a cape: the backs of the knee walls and the joist bays at the eave. At the lower level: the rim joist all the way around, including the stretch hidden above a finished ceiling, and the sill where framing meets foundation. Then the garage wall and ceiling. Only then does insulation go in at depth, on the attic floor, the knee walls, the rim and any walls worth filling.
If a quote specifies a depth of insulation and never mentions air sealing, it is half a job.
What insulation costs in Fort Salonga
Most of our projects run between $3,500 and $12,500. A one-story ranch with a single attic sits toward the lower end. The number climbs with a lower level: the length of rim joist, whether a finished ceiling has to be opened to reach it, and how much buried wall is dry enough to insulate. A pre-1940 house with balloon-framed walls to block and fill sits higher. For the foam side of the price, see what spray foam costs.
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 Fort Salonga
On both sides of the town line, Fort Salonga’s electric company is PSEG Long Island. The gas company is National Grid, whose gas is available on many streets but not all, so the bill settles whether yours has it. Because PSEG Long Island supplies the electricity, NYSERDA’s Comfort Home program is not open to Fort Salonga homes.
The program that fits is PSEG Long Island’s own. It begins with a free Whole House Energy Assessment that includes a thermal scan and a blower door test. For market-rate single-family homes PSEG Long Island lists a $2,500 insulation rebate and a $1,000 air-sealing rebate, plus $500 for duct sealing, with higher amounts for income-qualified homes and homes in state-designated disadvantaged communities. Oil is named as an eligible primary heating fuel. The insulation has to go in together with blower-door-assisted air sealing, and the rebates are paid through PSEG Long Island’s participating contractors, so ask anyone quoting the job whether they are on that list.
National Grid’s Long Island insulation rebate program is not taking new applications, and income-eligible households now go through NYSERDA’s EmPower+. It can pay for air sealing and insulation at no cost up to $14,000 for lower-income households, at or below $98,925 for a Suffolk household of four, or half the cost up to $7,000 for moderate-income households below $131,900 for four, through an EmPower+ contractor. Long Island households should check eligibility on the MyEnergy portal. NYSERDA’s Green Jobs–Green New York program also offers unsecured loans of $1,500 to $25,000 over 5, 10 or 15 years.
There is no tax credit to stack on top. Section 25C, the federal insulation tax credit, ended for work placed in service after 31 December 2025, so a 2026 job carries no federal credit, and New York has no state tax credit for insulation. Our New York and New Jersey rebate guide sets out each program in full.
Code and climate in Fort Salonga
79.4% of Fort Salonga’s homes were built before 1980. New York’s first statewide energy code took effect on 1 January 1979, so the capes and ranches of the 1950s and the splits of the 1960s went up with no state energy standard at all. Suffolk County, Huntington side and Smithtown side alike, is Climate Zone 4.
New houses have been built to the 2025 Energy Conservation Construction Code of New York State since 31 December 2025. Its table calls for R-49 in the ceiling, which R-38 satisfies when it covers the entire ceiling and the uncompressed R-38 runs at full height over the wall top plate at the eaves; R-30 in floors; basement and crawl space walls at R-15 continuous, R-19, or R-13 plus R-5 continuous, the figures that apply to a lower level; windows at U-0.27; and air leakage of no more than 3.0 air changes per hour at 50 pascals.
A house already standing is not pulled up to that table. Unaltered portions do not have to comply, and New York’s code does not require a blower door test when you insulate an existing home. But when an alteration exposes roof or wall cavities, as when paneling comes off a lower-level wall, those cavities must be insulated to full depth. ENERGY STAR recommends R-60 for an uninsulated attic in this zone, and R-49 where 3 to 4 inches are already down.
Common questions about insulation in Fort Salonga
Do you install insulation in Fort Salonga, NY?
Yes, on the Huntington and Smithtown sides of the hamlet alike, and in Crab Meadow. Most of the work is in the houses of the 1950s and 60s, 25.5% and 24.4% of the stock: settled attics over ranches, knee walls in capes, and rim joists at the lower level, including the ones hidden behind finished ceilings. We also work in the 335 houses built before 1940, where balloon framing and old wiring get checked first, and in newer colonials with ducts in the attic.
How much does insulation cost in Fort Salonga?
Most projects run $3,500 to $12,500. A one-story ranch with one attic sits near the lower end. A house that steps down to a lower level costs more, depending on the length of the rim joist, whether a finished ceiling has to be opened to reach it, and whether the buried walls are dry enough to insulate. Balloon-framed walls in a pre-1940 house push it higher. We give a written scope and price after a free walk-through.
Are there insulation rebates in Fort Salonga?
Yes, through PSEG Long Island, which supplies electricity in both towns. It lists a $2,500 insulation rebate and a $1,000 air-sealing rebate for market-rate single-family homes, with more for income-qualified homes, paid through its participating contractors after a free Whole House Energy Assessment, and oil-heated houses qualify. Comfort Home cannot be used by PSEG Long Island customers. Income-eligible households can apply to EmPower+. The federal 25C credit ended for work placed in service after 31 December 2025, and New York has no state insulation tax credit.
Our Fort Salonga house is big and heats with oil. Should we do the work all at once or in stages?
Stages work if they follow the right order. Start with the attic floor and the rim joist, sealed and then insulated, because the top and bottom of a house are where warm air leaves and cold air is pulled in. Walls, the buried block of a lower level and a garage ceiling can follow in a later season. What should never be split is the sealing from the insulating in the same space, since insulation laid over open gaps has to be pulled back later. If PSEG Long Island rebates are part of the plan, ask how staging affects them before the assessment.
Free energy audit in Fort Salonga
We start in the attic at the chimney and the hatch, and look behind the knee walls if the house has them. Then we go to the lowest level: the rim joist, the sill, the buried wall, the boiler room, and the ceiling over any finished room to see what is concealed above it. If the attic is the whole job, we say so. Then a written scope and a price. No charge, no obligation.
Call 914-825-6824 or reach us through our contact page. Open 8am–8pm, seven days. We work out of New Rochelle, NY with a 100-plus in-house crew that never subcontracts.
Learn more
- Insulation contractors across Suffolk County
- Insulation in Kings Park
- Insulation in East Northport
- Insulation in Smithtown
- Basement insulation
- Air sealing
- Insulation for older homes