A home energy audit is a room-by-room inspection that pinpoints exactly where your house loses heat in winter and gains it in summer — the hidden air leaks, thin insulation, and weak spots that quietly drive up your energy bills. For homeowners across Westchester, Rockland County, and Bergen County, an audit is the honest first step before spending a dollar on insulation.
What Happens During a Home Energy Audit
A good audit is diagnostic, not a sales pitch. A technician walks your home inside and out, measures your existing insulation, and looks for the pathways where conditioned air escapes. Depending on the home, the visit may include:
- A visual inspection of the attic, walls, basement, crawlspace, and rim joists to check insulation type, depth, and condition.
- Air-leak detection around windows, doors, recessed lights, plumbing and wiring penetrations, and attic hatches.
- A blower-door test (on many audits) that depressurizes the house to reveal how leaky it really is and where the drafts originate.
- Thermal imaging that shows cold spots and missing insulation behind finished walls without any demolition.
The result is a clear picture of your home's weak points and a prioritized plan — starting with the fixes that return the most comfort and savings per dollar.
What an Audit Reveals About Your Insulation
Most older NY and NJ homes underperform for two reasons: they leak air, and they simply don't have enough insulation. Insulation is measured in R-value — its resistance to heat flow. The higher the R-value, the better the material slows heat moving through it. The U.S. Department of Energy recommends roughly R-49 to R-60 for attics in our northern climate, yet many homes we visit sit far below that.
An audit answers three questions: how much insulation you have now, how much you should have, and whether air sealing needs to come first. Air sealing and insulation work together — adding insulation over a leaky attic floor is like wearing a thick sweater with the zipper wide open.
Insulation Types and What They Do
There is no single "best" insulation — the right choice depends on the space, the goal, and the budget. Here's how the common materials compare:
Spray foam
- Closed-cell spray foam (~R-6 to R-7 per inch) — the highest R-value per inch, and it acts as both an air barrier and a vapor barrier, making it ideal for rim joists, crawlspaces, and tight spaces.
- Open-cell spray foam (~R-3.5 to R-3.8 per inch) — softer and more affordable, excellent for air sealing larger cavities and dampening sound.
Fiberglass, cellulose, and mineral wool
- Fiberglass batts (~R-3 to R-4 per inch) — cost-effective and dependable in open, standard-framed cavities.
- Blown-in cellulose (~R-3.2 to R-3.8 per inch) — settles into attics and irregular spaces to slow air movement.
- Mineral wool (~R-3 to R-4.2 per inch) — dense, fire-resistant, and a strong sound barrier.
Rigid board is also used for basement walls and exterior applications. Often the best result comes from combining approaches — for example, air sealing plus blown-in insulation in an attic.
What Drives the Cost of Insulation
The honest answer is that cost varies too much for a number to mean anything until we see your home. What actually moves the price:
- Material type — spray foam costs more than batts or blown-in, but delivers more per inch.
- Square footage of the area being treated.
- Target R-value and thickness — how much you're adding to reach the goal.
- Accessibility — an open attic is simpler than a finished wall or a tight crawlspace.
- Removal of old insulation — wet, moldy, or rodent-damaged material may need to be cleared out first.
The only fair way to price a job is a free, no-obligation estimate based on your actual home.
Rebates and Incentives
Both New York and New Jersey offer utility and state energy programs that can help offset the cost of insulation and weatherization, and these incentives change over time. A home energy audit is the natural starting point, because many programs are tied to an assessment of your home's current efficiency. As part of your free audit, we'll help you understand what you may currently qualify for — rather than guessing at figures that may be out of date.
Frequently Asked Questions
How long does a home energy audit take?
Most audits take one to a few hours, depending on the size and complexity of the home. You'll get clear feedback on what we find.
Is the audit really free?
Yes. The Home Insulators provides free energy audits and estimates, with no obligation to move forward.
How much can I really save?
Savings vary by home, but properly air-sealed and insulated homes cut a great deal of energy waste — many of our customers see 20% or more off their heating and cooling costs.
Do I need to remove my old insulation?
Not always. Sometimes we add over what's already there; other times damaged or contaminated material should be removed first. The audit tells us which.
Since 2015, The Home Insulators has helped families across Westchester, Rockland County, and Bergen County make their homes more comfortable, quieter, and less expensive to run. If you're ready to see exactly where your home is losing energy — and what it would take to fix it — schedule your free energy audit today. Call us at 914-233-3084 and let's take a look together.