Insulation in Yonkers, NY
Spray foam insulation in Yonkers typically runs between $2.10 and $6.80 per board foot installed, with most full attic jobs landing between $4,700 and $11,800 depending on depth and access. The work here looks different than it does in the newer suburbs to the north: our crews are usually foaming rim joists and roof decks inside pre-1930 balloon-frame two-families, not open truss attics built last decade. Call Topside Attic Insulation at (218) 261-7714 for a written price before any work starts.
Why Yonkers Homes Are Different
Yonkers is a city of attached and semi-attached wood-frame houses, most built between 1890 and 1945, with a concentration in neighborhoods like Nodine Hill, the Hollow, Park Hill, and the South Broadway corridor. That stock is almost entirely balloon-frame: wall cavities run uninterrupted from the sill plate up to the roof ridge, which means blown-in insulation has to be properly blocked at the floor and ceiling lines or fill flows straight down into the basement. It also means air moves vertically through the house in ways a modern platform-frame home never allows.
The city straddles IECC climate zones 4A and 5A, and winter winds channeling down the Hudson Valley hit west-facing facades along the riverfront hard. Westchester code enforcement has tightened air-sealing compliance on permit-pulled jobs in recent years, and blower-door testing is now common on larger renovations. The biggest local variable we see is knob-and-tube wiring: New York State code prohibits covering live circuits with insulation, so in many Yonkers attics, electrical remediation has to happen before insulation does. We don’t blow or foam over it. Ever.
Our Main Yonkers Services
Two jobs dominate the phone calls we get from Yonkers homeowners: attic insulation on balloon-frame two-families, and crawl space work in the older attached stock where moisture problems have been building for decades.
Attic Insulation in Yonkers
Attic insulation in Yonkers starts with the wiring. In Nodine Hill and the Hollow, live knob-and-tube circuits are so common that we routinely flag them before any material gets specified. Once electrical work is done, the job itself is straightforward: seal the top plates and penetrations, block the balloon cavities, and blow to R-49 or higher. Read the full breakdown on our Attic Insulation in Yonkers page.
Crawl Space Encapsulation & Vapor Barrier in Yonkers
Older Yonkers crawl spaces are damp, shallow, and often completely unventilated. We find fiberglass batts sagging into mud, rim joists wicking moisture from stone foundations, and air moving straight from the crawl into the living space above. Encapsulation starts with air sealing the rim, then a full vapor barrier installation. Details are on the Crawl Space Encapsulation & Vapor Barrier in Yonkers page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Spray Foam Insulation in Yonkers
Spray foam in Yonkers solves a problem built into the housing stock: balloon-frame cavities and uninsulated rim joists that let conditioned air escape vertically through the entire building envelope. Closed-cell foam at the rim and open-cell foam in roof decks turns these pre-war two-families into sealed boxes, usually cutting the blower-door number by more than half. We install Spray Foam Insulation from Knauf, Icynene, and Rockwool-system components, and every job gets before-and-after air tightness readings.
Open-Cell Spray Foam
Signs you need it
Your attic is vented but the upstairs runs 8 to 10 degrees warmer than the rest of the house from June through September.
What it costs in Yonkers
Open-cell foam in Yonkers attics runs $0.55 to $1.30 per board foot, or roughly $2,600 to $5,500 for a typical roof deck.
How we do it
We mask the attic, foam the roof deck to R-38 or R-49, then run a blower-door test and hand you the before-and-after CFM50 reading.
Rim Joist Spray Foam
Signs you need it
Basement rim joists are bare or stuffed with crumbled fiberglass, and you can feel air moving along the floor above.
What it costs in Yonkers
Rim joist foaming in Yonkers basements runs $8 to $14 per linear foot, with most full perimeters landing between $1,200 and $2,300.
How we do it
We clean each joist bay, seal the sill-to-rim seam, and apply two inches of closed-cell foam to the entire perimeter.
What Spray Foam Insulation Costs in Yonkers
| Item | Typical range in Yonkers |
|---|---|
| Open-cell attic roof deck | $2,600 - $5,500 |
| Closed-cell rim joist perimeter | $1,200 - $2,300 |
| Full attic + rim joist package | $4,700 - $11,800 |
Is spray foam worth the cost in an old Yonkers house?
In balloon-frame homes, yes. Foam seals the vertical air channels that fiberglass cannot, so the performance difference shows up directly in the blower-door number we document after every job.
Can you foam over old knob-and-tube wiring?
No. New York State Energy Code prohibits any insulation over live knob-and-tube circuits. We flag the wiring, and in most Yonkers homes, electrical remediation happens first. Call (218) 261-7714 to schedule an inspection.
Blown-In Insulation in Yonkers
Blown-in insulation in Yonkers works with the stock, not against it: dense-packed cellulose fills balloon-frame wall cavities fully, and blown fiberglass brings flat attic floors to R-49 quickly. The catch is that balloon cavities need blocking at the floor and roofline before any material goes in, otherwise fill drops into the basement. We use Blown-In Insulation from GreenFiber, Johns Manville, and CertainTeed, and every job is air-sealed first.
Dense-Pack Wall Insulation
Signs you need it
Walls feel cold in winter, the rooms above the basement rim are drafty, and you can hear exterior noise clearly through the plaster.
What it costs in Yonkers
Dense-pack cellulose in Yonkers walls runs $1.60 to $2.60 per square foot, with most two-family units landing between $4,800 and $7,900.
How we do it
We drill through the siding or interior plaster, block the cavities at each floor line, and dense-pack cellulose until the wall is firm.
Blown-In Top-Up
Signs you need it
Your attic fiberglass has settled below the joist tops or a prior homeowner filled around venting badly.
What it costs in Yonkers
Top-up blowing in Yonkers attics runs $1.10 to $1.70 per square foot, or $1,200 to $2,400 for a typical 1,200-square-foot attic.
How we do it
We seal the attic floor first, add baffles where needed, then blow to R-49 and photograph the final depth at several points.
What Blown-In Insulation Costs in Yonkers
| Item | Typical range in Yonkers |
|---|---|
| Dense-pack cellulose walls | $4,800 - $7,900 per unit |
| Blown-in attic top-up | $1,200 - $2,400 |
| Full attic blow to R-49 | $1,800 - $4,100 |
Does blown-in insulation settle in old Yonkers attics?
Cellulose settles about 2 to 3 percent when dense-packed and slightly more when loose-blown; fiberglass settles very little. We install to spec so the final depth is the labeled R-value.
Can you dense-pack balloon-frame walls from inside?
Yes, and in Yonkers we often do, because brick-facing or stucco makes drilling from the exterior destructive. We work through the interior plaster. Call (218) 261-7714 for a written price.
Radiant Barrier Installation in Yonkers
Radiant barrier in Yonkers earns its keep in July and August, when the sun hits dark asphalt roofs and attics on top-floor units hit 130 degrees. It’s particularly useful on the south-facing attached row houses in Park Hill and the Hollow, where roofs are shallow-pitched and heat soaks through quickly. We install Radiant Barrier Installation as a foil roof-deck layer, always paired with proper ventilation so we don’t trap moisture in the assembly.
Attic Radiant Barrier
Signs you need it
Top-floor rooms stay hot until long after sunset and the attic door feels like it’s radiating heat into the hallway.
What it costs in Yonkers
Radiant barrier installed on attic floor or rafters in Yonkers runs $1.10 to $1.80 per square foot of area covered.
How we do it
We staple the foil to the underside of the rafters, maintain the venting gap, and document the installation with photos before finishing.
Radiant Barrier & Ventilation
Signs you need it
The attic is insulated with fiberglass but has no ridge or soffit venting, or the existing vents are buried under old insulation.
What it costs in Yonkers
Adding ventilation with radiant barrier in Yonkers runs $900 to $2,000 depending on roof size and vent specifications.
How we do it
We clear the soffit air pathway, add vents to meet Westchester code, then install the radiant barrier and verify airflow.
What Radiant Barrier Installation Costs in Yonkers
| Item | Typical range in Yonkers |
|---|---|
| Foil on attic rafters | $1.10 - $1.80 per sq ft |
| Barrier + ventilation package | $900 - $2,000 |
| Barrier with attic cleaning | $1,600 - $3,200 |
Does radiant barrier actually help in Yonkers summers?
It reduces radiant heat gain into the attic, which lowers attic temperatures and keeps the top floor cooler. It’s not a substitute for insulation; we recommend it with air sealing and proper R-value, not alone.
Is radiant barrier safe with an older roof?
Yes, provided the roof assembly is ventilated and the foil doesn’t trap moisture. In Yonkers row houses we check venting first because the roof decks run shallow. Call (218) 261-7714 for an assessment.
Insulation Removal & Replacement in Yonkers
Insulation removal in Yonkers is usually driven by two things: rodent contamination, or fiberglass that was crammed into knee walls and floor cavities decades ago without any vapor management. In the brick row houses of Park Hill and the Hollow, that pattern repeats block after block: batts stuffed tight, moisture trapped, mold behind the plaster. We remove and replace with Insulation Removal & Replacement done properly, with air sealing in between.
Contaminated Insulation Removal
Signs you need it
You hear scratching in the attic, find droppings in the insulation, or smell a persistent musty odor from above.
What it costs in Yonkers
Contaminated insulation removal in Yonkers attics runs $1.80 to $3.40 per square foot, including HEPA bagging and disposal.
How we do it
We remove all contaminated material with HEPA vacuums, bag it, sanitize the cavity, and install new insulation after air sealing.
Insulation Replacement
Signs you need it
Existing insulation is compressed, wet, or thinner than the joist tops, or a prior remodel left the attic floor half insulated.
What it costs in Yonkers
Full attic replacement in Yonkers, including removal and new blow to R-49, runs $2,700 to $5,900 for a typical 1,200-square-foot attic.
How we do it
We remove the old material, expose the attic floor, seal every penetration, and blow new insulation to the specified depth.
What Insulation Removal & Replacement Costs in Yonkers
| Item | Typical range in Yonkers |
|---|---|
| Contaminated removal | $1.80 - $3.40 per sq ft |
| Attic replacement to R-49 | $2,700 - $5,900 |
| Removal + air sealing package | $3,400 - $7,100 |
How long does insulation removal take in a Yonkers attic?
Most single attic jobs are done in a day, sometimes two if the attic is tight or the contamination is extensive. We tell you the schedule in the written scope before work starts.
Do I need to leave the house during removal?
Not usually, but we do ask that you avoid the attic access and the area around it. HEPA equipment contains the dust. Call (218) 261-7714 for details on your specific job.
Attic Air Sealing in Yonkers
Attic air sealing is the single highest-impact job we do in Yonkers. Balloon-frame homes move air vertically: every top plate, can light, and plumbing penetration is a chimney for conditioned air leaving the living space. We seal the attic floor before any insulation goes down, then prove the result with a before-and-after blower-door number. That’s the core of our Attic Air Sealing work, and it happens on every applicable Yonkers job.
Top Plate & Penetration Sealing
Signs you need it
Drafts come up through the attic floor, the upstairs is cold all winter, and the attic insulation looks dirty from air moving through it.
What it costs in Yonkers
Top plate and penetration sealing in Yonkers attics runs $1.40 to $2.20 per square foot of attic floor.
How we do it
We seal the framing seams at every top plate with foam, caulk electrical and plumbing penetrations, and document each location in photos.
Can Light & Duct Boot Sealing
Signs you need it
Recessed lights in the top-floor ceiling are open-backed, and you can feel air moving around them when the system runs.
What it costs in Yonkers
Sealing can lights and duct boots in Yonkers runs $20 to $35 per fixture or boot, with most attics landing between $400 and $900.
How we do it
We cover non-IC-rated lights with rated enclosures, foam around IC-rated housings, and mastic-seal every duct boot to the ceiling.
What Attic Air Sealing Costs in Yonkers
| Item | Typical range in Yonkers |
|---|---|
| Top plate & penetration sealing | $1.40 - $2.20 per sq ft |
| Can light & duct boot sealing | $400 - $900 per attic |
| Full attic seal package | $1,100 - $3,400 |
Why does air sealing matter more than insulation in old Yonkers homes?
Because air leaks carry heat and moisture out far faster than lack of R-value does. Sealing first means the insulation actually performs; unsealed attic insulation in a balloon-frame house is a filter, not a barrier.
How do I know air sealing made a difference?
We run a blower-door test before and after, then give you both CFM50 numbers in writing. That’s the documented performance record we leave on every applicable job. Call (218) 261-7714 to schedule a test.
Wall Insulation in Yonkers
Wall insulation in Yonkers is mostly dense-pack work in balloon-frame cavities that have never held insulation at all. The cavities run open from basement to attic, which is why blocking and air sealing matter more here than anywhere else we work. We install Wall Insulation in Nodine Hill, the Hollow, and South Broadway two-families after checking every cavity for knob-and-tube wiring and thermal bypasses.
Injection Foam Wall Insulation
Signs you need it
Walls feel cold to the touch in winter and rooms never hold their temperature even with the boiler running steadily.
What it costs in Yonkers
Injection foam wall insulation in Yonkers runs $2.90 to $4.40 per square foot of wall area.
How we do it
We drill a discrete pattern through the interior or exterior, inject foam in controlled lifts, then patch each hole and photo the process.
Exterior Wall Insulation
Signs you need it
You’re already opening walls for a gut renovation or replacing siding on a pre-war frame house, and the sheathing is exposed.
What it costs in Yonkers
Exterior wall insulation in Yonkers runs $1.90 to $3.50 per square foot depending on the assembly and sheathing condition.
How we do it
We insulate the open stud bays, air-seal the sheathing seams, and include the work in the broader scope with photo documentation.
What Wall Insulation Costs in Yonkers
| Item | Typical range in Yonkers |
|---|---|
| Injection foam walls | $2.90 - $4.40 per sq ft |
| Exterior wall insulation | $1.90 - $3.50 per sq ft |
| Dense-pack cellulose walls | $1.60 - $2.60 per sq ft |
Can you insulate old plaster walls without removing them?
Yes. Dense-pack and injection foam go in through small holes in the plaster or siding, then get patched nearly invisibly. The plaster stays intact; the cavity gets filled.
What about knob-and-tube wiring inside the walls?
Live knob-and-tube cannot be covered with insulation under New York code. We inspect each cavity first and work with your electrician on remediation before insulating. Call (218) 261-7714 to review your options.
Attic Cleaning & Rodent Proofing in Yonkers
Attic cleaning and rodent proofing in Yonkers is a prerequisite for insulation work, not a separate add-on. The pre-war frame housing stock gives squirrels and rats entry points through open soffits, gaps at the roof-wall line, and gnawed gable vents. We clean, sanitize, seal, and then insulate, in that order. Our Attic Cleaning & Rodent Proofing work includes a Documented Photo Record of every exclusion point before we leave.
Attic Cleanout
Signs you need it
The attic floor is covered in droppings, the insulation is matted and urine-stained, or a prior owner left decades of stored material blocking access.
What it costs in Yonkers
Attic cleanout in Yonkers runs $750 to $1,600 for a typical attached two-family attic, including bagging and removal of contaminated insulation.
How we do it
We remove all debris and contaminated material, HEPA-vacuum the space, and photograph the clean floor before any sealing or insulation begins.
Rodent Proofing & Exclusion
Signs you need it
You hear scratching at dawn or dusk, find gnawed wood around the roof edge, or notice squirrels entering near the gable vents.
What it costs in Yonkers
Rodent proofing and exclusion in Yonkers attics runs $400 to $1,000 depending on the number and location of entry points.
How we do it
We seal every accessible entry point with steel mesh, foam, and flashing, then check the entire perimeter and document the work.
What Attic Cleaning & Rodent Proofing Costs in Yonkers
| Item | Typical range in Yonkers |
|---|---|
| Attic cleanout | $750 - $1,600 |
| Rodent proofing & exclusion | $400 - $1,000 |
| Cleanout + exclusion + insulation | $2,300 - $6,800 |
Should rodents be gone before insulation goes in?
Yes. Insulating over an active rodent problem means contaminated material within months. We clean and exclude first, then insulate, so the new material starts out dry and clean.
How do you keep squirrels out of a Yonkers attic permanently?
By sealing every entry point with materials they can’t chew through: steel mesh, hardware cloth, and foam in combination. The key is finding all of them, not just the obvious one. Call (218) 261-7714 to schedule an inspection.
Home Energy Audit in Yonkers
A home energy audit in Yonkers gives the documented performance baseline most of this housing stock has never had. Balloon-frame homes hide air leaks in wall cavities, floor-to-floor channels, and rim joist gaps that thermal imaging exposes quickly. We run a blower-door test, walk the house with an infrared camera, and produce a written report with the numbers. That’s the foundation of our Home Energy Audit work, and it’s what we use to build a scope, not a sales pitch.
Blower Door Test
Signs you need it
Your heating bills are high, rooms are unevenly warm, or you want a verifiable number before and after an air-sealing job.
What it costs in Yonkers
A standalone blower-door test in Yonkers runs $350 to $550, and is included as documentation when we do air sealing.
How we do it
We depressurize the house with a calibrated fan, record the CFM50 reading, then show you exactly where air leaks are using a smoke pen.
Thermal Imaging Inspection
Signs you need it
Some rooms are always cold, the walls sweat in summer, or you suspect missing insulation in enclosed cavities.
What it costs in Yonkers
Thermal imaging in Yonkers runs $200 to $400 as a standalone inspection, or is included with a full home energy audit.
How we do it
We scan every wall, ceiling, and floor with an infrared camera, photograph the anomalies, and map them in the written report.
What Home Energy Audit Costs in Yonkers
| Item | Typical range in Yonkers |
|---|---|
| Blower-door test | $350 - $550 |
| Thermal imaging inspection | $200 - $400 |
| Full audit with written report | $500 - $900 |
How long does a home energy audit take in Yonkers?
Most audits run two to three hours for a typical pre-war two-family. The written report with thermal images and blower-door numbers comes after the visit, usually within a few days.
Is an energy audit required before insulation work?
Not required, but in Yonkers we recommend it, especially on balloon-frame homes where the air leakage paths are hidden. An audit gives you a documented baseline before we touch anything. Call (218) 261-7714 to book one.
Brands We Service in Yonkers
We install materials from Knauf, Rockwool, CertainTeed, and Icynene, among others. Equipment and stock for these systems are available locally through the brand’s NYC supply chain, so most Yonkers projects start within a week of a signed scope. See the full list on our brands page.
Pricing for Insulation in Yonkers, NY
| Service | Typical range in Yonkers |
|---|---|
| Open-cell spray foam attic | $2,600 - $5,500 |
| Closed-cell rim joist foam | $1,200 - $2,300 |
| Dense-pack cellulose walls | $4,800 - $7,900 per unit |
| Blown-in attic top-up | $1,200 - $2,400 |
| Radiant barrier installation | $1.10 - $1.80 per sq ft |
| Contaminated insulation removal | $1.80 - $3.40 per sq ft |
| Attic air sealing | $1.40 - $2.20 per sq ft |
| Attic cleanout | $750 - $1,600 |
| Blower-door test | $350 - $550 |
| Full home energy audit | $500 - $900 |
In Yonkers, price gets pushed up by balloon-frame blocking work, knob-and-tube remediation waits, and tight access in attached row houses. Your written price from Topside Attic Insulation is flat and delivered before any work starts; we don’t change it after the fact.
Neighborhoods We Serve in Yonkers
We work across the city, from the riverfront blocks to the eastern edge. The pre-war attached stock in the central neighborhoods is our daily work, but we also handle newer construction toward the city line.
- Nodine Hill
- The Hollow
- Park Hill
- South Broadway corridor
- Getty Square area
We typically schedule Yonkers jobs within a week of a signed scope, and dispatch from the brand’s New York City office with local crews.
Service Area - Cities Near Yonkers
We also provide the full insulation service line in neighboring communities. Our crews serve Mount Vernon, NY to the east and New Rochelle, NY along the Sound shore, applying the same sealed-first workflow and written-price standard.
Serving Yonkers, NY - Our Local Coverage Area
We’re based in the Yonkers area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Insulation in Yonkers
Most Yonkers jobs start within a week of a signed written scope. A live person answers calls 24/7 at (218) 261-7714, so you’ll get a real answer, not a callback window.
Most insulation and air sealing work doesn’t require a permit by itself, but larger renovations that pull permits increasingly include air-sealing compliance checks in Westchester County. We tell you in the written scope if permitting applies to your job.
Yes. Attached row houses in Park Hill and the Hollow are common for us. We work from the interior when exterior access is constrained, and we document the process in photos so you see what was done.
Call Topside Attic Insulation at (218) 261-7714 for a written price on any insulation job in Yonkers. Wes Okafor leads the team, and every job starts with a written scope and ends with a documented record.
What happens when you call
- 1A real person answersNo phone trees - talk to a local insulation pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3A background-checked tech heads outLicensed & insured, typically within 1-hour.
- 4You approve before work beginsNothing starts until you say go.
What Yonkers Customers Say
"Fixed price, clean work, and they hauled the old material away as agreed."
- Todd M."They photographed rodent damage in the old insulation that we had no idea about, and priced the exclusion work separately so we could decide."
- Harriet N."They air-sealed the attic floor before insulating and showed me the blower-door number before and after. The upstairs is finally the same temperature as downstairs."
- Marisol D.