Your attic is the single biggest opportunity in most homes to stop wasted energy — and it is where The Home Insulators has focused since 2015. Because heat naturally rises, an under-insulated attic quietly pulls the air you pay to heat and cool out of your living space all year long.
Why the Attic Is Where Energy Savings Begin
Warm air rises and escapes through the highest point in your house, a pressure difference known as the stack effect. In winter, the heat you pay for leaks out through the attic while cold air is drawn in around windows and doors below. In summer, an unshielded attic can climb well over 120 degrees and radiate that heat down into your bedrooms.
Proper attic insulation slows heat transfer in both directions, so your furnace and air conditioner run less often and for shorter cycles. For most of the homes we service across Westchester, Rockland, and Bergen County, sealing and insulating the attic is the highest-return improvement available — many homeowners see energy savings of 20% or more.
Choosing the Right Insulation for Your Attic
There is no single "best" insulation. The right choice depends on your attic's construction, moisture conditions, and budget. Here is how the materials we install compare by R-value, the industry measure of resistance to heat flow:
- Closed-cell spray foam — roughly R-6 to R-7 per inch, the highest of any option we use. It also acts as its own air barrier and vapor retarder, making it ideal for sealing complex roof lines and cathedral ceilings.
- Open-cell spray foam — about R-3.5 to R-3.8 per inch. It expands to fill gaps and dampens sound, a strong fit for interior attic spaces where a vapor barrier is not required.
- Blown-in cellulose — approximately R-3.2 to R-3.8 per inch. Dense, made largely from recycled fiber, and excellent for evenly covering an open attic floor.
- Fiberglass batt — about R-3 to R-4 per inch. A cost-effective, proven choice for standard joist bays and knee walls.
- Mineral wool — roughly R-3 to R-4.2 per inch, naturally fire-resistant and water-repellent.
- Rigid foam board — a high R-value-per-inch panel we use where space is tight, such as knee walls, rafters, and finished attic conversions.
Air Sealing: The Step Most Homes Skip
Insulation slows heat transfer, but it does not stop air from leaking. A thick layer of fiberglass over an unsealed attic floor still lets air rush through gaps around wiring, plumbing stacks, recessed lights, and the top plates of your walls. That is why air sealing and weatherization come first on every job we do.
We seal those hidden penetrations with caulk, foam, and gaskets before adding or topping up insulation. The result is a continuous barrier that keeps conditioned air in, blocks drafts and moisture, and lets your chosen insulation perform to its full rating instead of being short-circuited by hidden airflow.
Not sure what your attic needs? That is exactly what our free energy audit is for. A member of our family-owned team will inspect your attic, measure your current insulation, find the leaks driving up your bills, and give you honest, no-pressure recommendations. Call The Home Insulators today at 914-233-3084 to schedule your free energy audit and start saving.