Insulation is one of the highest-return upgrades you can make to a New York or New Jersey home, yet it is also one of the most misunderstood. Below, our team at The Home Insulators answers the questions homeowners across Westchester, Rockland, and Bergen County ask us most.
Which type of insulation is right for my home?
There is no single "best" insulation — the right choice depends on where it is going, whether you need an air barrier, and your budget. Here is how the common materials compare by R-value (a measure of resistance to heat flow) per inch:
- Closed-cell spray foam — roughly R-6 to R-7 per inch. It is the densest option and doubles as an air barrier and vapor retarder, making it ideal for rim joists, basements, crawl spaces, and cathedral ceilings.
- Open-cell spray foam — about R-3.5 to R-3.8 per inch. Softer and more affordable than closed-cell, it seals air leaks well and helps dampen sound in interior walls.
- Fiberglass batt — about R-3 to R-4 per inch. A cost-effective, widely used choice for open wall cavities and attic floors.
- Blown-in cellulose — about R-3.2 to R-3.8 per inch. Great for topping off attics and filling irregular spaces.
- Mineral wool — about R-3 to R-4.2 per inch. Naturally fire-resistant and excellent for soundproofing.
- Rigid board — a strong performer for continuous exterior insulation and foundation walls.
Often the best solution combines materials — for example, spray foam to seal and cellulose or fiberglass to add depth affordably.
How much insulation do I actually need?
Our region falls in a cold climate zone, so the U.S. Department of Energy recommends roughly R-49 to R-60 for attics here — the equivalent of a deep, even blanket across the attic floor. Many older Westchester, Rockland, and Bergen homes were built with a fraction of that, which is why attics are usually the first place we look. Walls, basements, and crawl spaces matter too, but the attic almost always delivers the fastest comfort and energy improvement.
Why does air sealing matter as much as R-value?
You can pile insulation into an attic and still feel drafts if the air leaks underneath are never addressed. Heat escapes through gaps around recessed lights, top plates, attic hatches, and plumbing chases. That is why we pair insulation with air sealing and weatherization — stopping the leaks first, then insulating. Together they are what deliver the comfort and the typical energy savings of 20% or more that homeowners are really after.
What does insulation cost?
Honest answer: it depends, and anyone quoting a firm price sight-unseen is guessing. Real cost is driven by:
- Material type — spray foam costs more per inch than batts or blown-in.
- Square footage and thickness — the area covered and the R-value target you are aiming for.
- Accessibility — a tight crawl space or finished wall takes more labor than an open attic.
- Removal of old insulation — damaged, wet, or rodent-soiled material may need to come out first.
The only way to get an accurate number is an on-site look, which is exactly what our free estimate provides — with no obligation.
Are there rebates or incentives available?
Yes. Both New York and New Jersey offer utility and state-run energy programs that provide rebates and incentives for insulation and weatherization, and these can meaningfully lower your out-of-pocket cost. The catch is that program details, eligibility, and funding change over time. Rather than chase a figure that may already be outdated, let our team check what you currently qualify for as part of your energy audit — we stay current on what is available in your county so you do not leave money on the table.
Since 2015, The Home Insulators has helped families across Westchester and Rockland County, NY and Bergen County, NJ make their homes warmer in winter, cooler in summer, and cheaper to run. The best first step is our free energy audit — we will inspect your home, measure where energy is escaping, and lay out your options with no pressure. Call us today at 914-233-3084 to schedule.