Weatherization is the work of sealing a home against uncontrolled air leakage and then insulating it correctly — the two together are what keep the air you have paid to heat or cool from slipping outside. For homeowners across Westchester, Rockland, and Bergen County, it is often the single most cost-effective improvement a house can receive, and it has been the foundation of everything The Home Insulators has done since 2015.
How Weatherization Works
Most people picture insulation as the whole story, but insulation only slows heat that moves by conduction — it does very little to stop moving air. A home also loses energy through the stack effect: warm air rises and escapes through gaps near the top of the house, which creates a slight vacuum that pulls cold outdoor air in through cracks down low. In effect, the house behaves like a chimney. That is why genuine weatherization always pairs two steps.
- Air sealing closes the leaks — the pathways air actually travels through.
- Insulation then slows the heat that still tries to conduct through walls, floors, and ceilings.
Skip the sealing and even a thick blanket of insulation underperforms, because air simply flows around it. Fiberglass batt is an excellent insulator but a poor air barrier — it needs the leaks addressed first to do its job well.
Where a Home Leaks
Air escapes from predictable places, and a trained crew knows exactly where to look:
- The attic — top plates, dropped soffits, attic hatches, recessed lights, and the holes drilled for plumbing and wiring. This is usually the single biggest source of loss.
- The basement and rim joist — the band of framing where the foundation meets the wood structure is a classic cold-air entry point.
- Windows, doors, and penetrations — dryer vents, hose bibs, cable, and gas lines all leave gaps around them.
Sealing the top and bottom of the house first breaks the stack effect and delivers the largest, fastest improvement in comfort.
Materials and R-Values
R-value measures resistance to heat flow — the higher the number, the better a material insulates per inch. The right choice depends on the space being treated:
- Closed-cell spray foam — roughly R-6 to R-7 per inch (we rate ours at about R-6.88 per inch). It is dense, adds rigidity, and acts as both an air and vapor barrier, which makes it ideal for rim joists, cathedral ceilings, and unvented attics.
- Open-cell spray foam — about R-3.5 to R-3.8 per inch. It is softer, more breathable, expands to fill irregular cavities, and costs less, making it a strong choice for interior walls and many attic applications.
- Fiberglass batt — about R-3 to R-4 per inch. Affordable and dependable in standard stud and joist bays when paired with proper air sealing.
- Rigid board — depending on the type, roughly R-4 to R-6.5 per inch. It is used on foundation walls and as continuous exterior insulation to reduce thermal bridging through the framing.
There is no single best material; the real value is in matching each product to the assembly it protects.
What to Expect During a Project
Every job begins with a free energy audit. We walk the home, inspect the attic and basement, and pinpoint where energy is being lost. From there you receive a clear, honest scope — what to seal, what to insulate, and what it will cost, with no pressure.
Installation is typically completed in a day or two for most homes. Crews protect finished spaces, seal the priority leak points, and install the insulation specified for each area. Many homeowners feel the difference right away: fewer drafts, more even room-to-room temperatures, and a quieter house. Most see 20% or more off their monthly heating and cooling bills.
If your home feels drafty in winter, uneven in summer, or your energy bills keep climbing, weatherization is where the savings start. Call The Home Insulators at 914-233-3084 to schedule your free, no-obligation energy audit — we will show you exactly where your home is losing energy and what it takes to fix it.