Finding a insulation company in Oyster Bay that shows up when they say they will, prices the job in writing, and stands behind the work shouldn't be hard — but ask around at any Oyster Bay coffee shop and you'll hear otherwise. Coastal Insulation Co serves homeowners throughout Oyster Bay and the surrounding area with local crews, straight answers, and free written estimates on every job.
Many Long Island homes — especially mid-century builds in Levittown, Hicksville, and Massapequa — were built with minimal insulation. Upgrading your attic, walls, and crawl space dramatically cuts PSEG Long Island bills and improves year-round comfort. Our BPI-certified crews serve all of Nassau and Suffolk counties with spray foam, blown-in, and batt insulation.
Blown-in and batt insulation for attics — the #1 source of heat loss in most homes. Immediate energy savings.
Dense-pack cellulose and injection foam for existing walls. No major demolition required.
Closed-cell and open-cell spray foam for maximum R-value, air sealing, and moisture protection.
Rigid board, spray foam, and vapor barriers for below-grade spaces. Stop moisture and heat loss at the foundation.
Yes — Oyster Bay is inside our core Long Island service area, not the edge of it. Our crews are in and around Oyster Bay regularly, which matters for scheduling and for honoring warranty visits.
Most Oyster Bay estimates are scheduled within a few days, and urgent calls are prioritized the same day whenever crews are in the area. Call (631) 496-4322 for the current schedule.
It depends on the scope, which is why we price from an on-site assessment — not over the phone. What we commit to: the estimate is free, the price is written and fixed, and there are no change-order surprises mid-job.
Tell us about the job — we'll come take a look.
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