The attic is where Long Island homes lose the most energy: heated air rises, and an under-insulated attic floor lets it escape all winter — then bakes the living space from above all summer. Most homes here built before 1990 have half the insulation current code calls for.
Coastal Insulation Co air-seals first, then insulates to R-49 or better — because insulation without air sealing is a filter, not a barrier.
Top plates, wire and pipe penetrations, and attic hatches leak more heat than the insulation shortfall itself. We seal before we blow a single inch.
Dense, even coverage that fills irregular bays — no gaps, no compression, verified with depth markers.
Proper attic insulation plus ventilation keeps the roof deck cold — which is what actually prevents ice dams.
Utility and state efficiency programs routinely cover a meaningful share of attic work. We handle eligibility and paperwork.
Attic assessment with photos: current R-value, air leaks, ventilation, moisture
Written scope with rebate estimate
Air sealing, baffles, and blown-in installation — most attics in one day
Depth verification and before/after documentation
Current guidance for our climate zone is R-49 to R-60 — roughly 14–17 inches of blown material. If you can see your joists, you are underinsulated.
Attic air-sealing plus insulation is consistently the best-payback efficiency upgrade in Northeast homes — typical heating/cooling savings run 10–20%, and comfort improves immediately.
Written pricing, no obligation, no pressure.
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