Long Island, New York
Attic Insulation on Long Island.
Your attic is where the money leaks out. Old insulation flattens, soaks up moisture, and stops working. We remove what is failing, seal the air leaks, and blow in fresh R-38. On Long Island, that shows up on your PSEG bill.
Old insulation doesn't fail loudly. It just stops working.
Most homeowners never look at their attic until a room won't stay warm or the electric bill keeps climbing. By then the insulation has settled and flattened, or it took on moisture and lost its R-value, or rodents got into it and fouled it. On the older Capes through Levittown and Hempstead, the walk-up attic over the stairs is often packed with insulation that has not done its job in years.
The salt air and humidity off the water make it worse here than inland: damp insulation grows mold faster, so a small roof leak or an old rodent mess turns into a moisture problem, not just a comfort one. We do the whole job: pull out what is failing, seal the air leaks in the attic floor, and blow in fresh R-38 so the new insulation actually performs.
One crew, start to finish
What a real attic insulation job looks like
Inspect and measure what is really up there
We go into the attic and check what you actually have: the depth of the old insulation, where it has flattened or gone missing, and whether anything has fouled it. We look at the eaves (the lower edge of your roof where it overhangs the wall) to make sure the vents that breathe the attic are not buried. You get photos, not a sales pitch.
Remove the old or fouled insulation
If the old insulation is matted flat, water-stained, or soiled by rodents, blowing fresh material on top of it just traps the problem. We pull it out and bag it. On older Capes through Levittown and Hempstead with walk-up attics, that means hauling it down the same stairs everyone uses, and we tarp the path so your house stays clean.
Air-seal the attic floor
Insulation slows heat, but it does not stop air. The biggest losses are the gaps where warm air pours straight up out of your living space: around can lights (recessed ceiling lights), along the top plates (the framing where the walls meet the attic), and around the attic stairs cover. We seal those first, because insulating without air-sealing is the most common reason a job underperforms.
Blow in fresh R-38
Then we blow in fresh insulation to a true R-38, our sensible target for a Long Island attic, and set baffles (the channels at the eaves that keep your roof vents clear so the attic still breathes). With PSEG Long Island electric among the highest rates in the country, a properly sealed and insulated attic pays you back every month on the bill.
Why remove-and-seal beats blowing new insulation on top
The fastest job an insulation company can sell you is the wrong one. Blowing fresh material on top of old, flattened, or fouled insulation takes an afternoon and looks great from the attic hatch. But it traps whatever was wrong underneath, the moisture, the odor, the rodent mess, and it does nothing about the air leaks in the attic floor that are the real reason the old insulation underperformed. We do the job in the right order: remove what is failing, air-seal the floor, then insulate to R-38, and we photograph every step so you can see what your money actually bought.
See exactly how it's done.
The Attic Fanatics videos have pulled tens of millions of views by showing the real work: real attics, the old insulation coming out, the air-sealing, and the fresh R-38 going in. Watch what a proper attic job actually looks like before you let anyone into your home.
Watch on InstagramAttic insulation questions, answered
How much does attic insulation cost on Long Island?
It depends on what is already up there. A clean attic that just needs fresh insulation blown over a sealed floor is one job; an attic where old, soiled, or flattened insulation has to come out, the floor has to be air-sealed, and fresh R-38 goes back is a larger one, because the removal and the air-sealing are real work that a blow-on-top job skips. We give you the real number after we see the attic, never a phone guess. Our costs page walks through the honest factors that move it up or down.
Why not just blow new insulation on top of the old?
Because it usually hides the real problem instead of fixing it. If the old insulation is matted flat, water-damaged, or fouled by rodents, fresh material on top traps the moisture, the odor, and the contamination, and it still leaks air through the gaps in the attic floor that nobody sealed. Insulation-only companies do the blow-on-top job because it is fast. We remove what is failing, seal the floor, then insulate, so the new R-value actually performs.
What R-value do you recommend for a Long Island attic?
R-38 blown-in is our default recommendation for an existing Long Island home. It hits the comfort and energy gains most homeowners are after without paying for material past the point of real return. Some new-construction code targets go higher, but in a retrofit the smarter money is on getting the air-sealing right first, then insulating to R-38.
Will new insulation really lower my PSEG bill?
Usually yes, and on Long Island the math is stronger than almost anywhere. PSEG Long Island electric rates are among the highest in the country, so every degree your attic stops leaking shows up on the bill. A sealed and properly insulated attic keeps the heat you paid for in winter and the cool you paid for in summer, instead of letting it pour out through the roof.
Does the coastal humidity matter for attic insulation here?
It does. The salt air and humidity off the water grow mold in damp or soaked insulation faster than you see inland, so insulation that got wet from a roof leak, a pipe, or a rodent mess does not just lose its R-value, it becomes a moisture problem. We pull out anything that is wet or fouled before we insulate, so you are not sealing a mold issue inside a fresh layer.
Free attic inspection in your town
Tell us what your attic is doing. We schedule a visit, measure what is up there, check the air leaks, and write the plan. No phone guesses, and we will tell you straight whether you need a full job or just fresh insulation.