The Town Seat
on Main Street
Few South Shore hamlets pack in as wide a range of home ages as Islip. South of Main Street (Montauk Highway) stand Victorians and Colonial Revival houses from the village's Gilded Age past; north of it fill in the Capes, hi-ranches, and mid-century ranches built for the postwar families of the town seat.
Each era framed its roofs differently, so a job in the 11751 ZIP is never one-size-fits-all. J. Great Roofing & Siding has worked this stretch of the South Shore since 1999 — knowing how Islip homes are built is half the job, and knowing what the bay throws at them is the other half.
The Great South Bay
Climate
Islip sits right on the Great South Bay, across the water from Fire Island, with canals threading the blocks below Union Boulevard. That waterfront setting is the draw — and the thing that wears roofs out, as Superstorm Sandy made painfully clear along these low-lying streets in 2012.
Wind is the constant threat. Nor'easters drive gusts across open water with nothing to slow them before they hit a bayfront gable, and a bargain-spec roof is the first thing to peel.
- Salt-air corrosion — bay air that eats cheap fasteners and thin aluminum near the canals
- Wind-driven rain — nor'easter gusts finding every gap in a poorly sealed valley or sidewall
- Flood exposure — low blocks south of Union Boulevard hit hard by Sandy's 2012 surge
- Steep older rooflines — Victorian dormers and cross-gables near Brookwood Hall that need careful flashing
- Brittle asphalt — original three-tab roofs north of Main Street with granules gone to the gutters
- Rotted decking — plywood weakened by years of water under an aging roof, found only at tear-off
Roofing Services
in Islip
From a full tear-off on a bayfront Victorian to a single flashing repair, every roofing and exterior need across the Town of Islip, handled by our own crews and backed in writing.
Roof Replacement
Full tear-off and GAF Master Elite installation on Islip Capes, ranches, colonials, and Victorians. Most homes done in a single day.
Explore Roofing
Roof Repair
Leaks, wind-torn shingles, cracked flashing, and storm damage on bayfront and inland homes, tracked to the source and fixed right.
Roof Repair
Siding & Gutters
Vinyl and fiber-cement siding, seamless aluminum gutters, soffit and fascia built for coastal exposure off the bay.
Siding & Gutters
24/7 Emergency Service
Nor'easter or storm damage overnight? We tarp and stabilize fast, day or night, before water reaches your Islip ceilings.
Storm DamageWhy Islip Homeowners
Choose J. Great Roofing
For a home taking coastal weather off the Great South Bay year after year, a warranty that stands behind the installation — not just the shingles — is worth a great deal.
GAF Master Elite®
A certification held by only the top 3% of roofing contractors in the country.
Golden Pledge® Warranty
Lifetime coverage on both materials and our labor — protection most local roofers can't offer.
Single-Day Installs
Most full replacements are torn off, installed, and cleaned up before we leave for the day.
Since 1999
25-plus years on Long Island's South Shore, fully licensed and insured in New York State.
Rated 5.0 Stars by Islip Neighbors
Across 87+ verified reviews, homeowners point to the same things: clean single-day installs, honest estimates, and a driveway swept clear of nails. Licensed and insured in New York State, open 7am–7pm Monday through Saturday.
Neighborhoods & Nearby Areas We Cover
Our shop is in West Babylon, a quick run west on Sunrise Highway and Montauk Highway, so we cover the Islip hamlet and the surrounding Town of Islip every week — including the neighborhoods near Long Island MacArthur Airport and the villages along the bay.
See the full service areas list for every town we cover across Long Island.
Islip Roofing FAQs
Straight answers to what Islip homeowners ask us most.
Yes. Much of the housing south of Main Street (Montauk Highway) is older colonial, Victorian, and mid-century construction, and those roofs often have steeper pitches, multiple planes, dormers, and dated flashing. We tear off and rebuild them with a full GAF Master Elite system and detail the valleys, chimneys, and sidewall flashing to match the way the home was originally framed.
Waterfront and canal-front homes south of Union Boulevard take more wind-driven rain and salt air off the bay. We upsize the underlayment and ice-and-water shield, seal the perimeter and penetrations tightly, and use corrosion-resistant fasteners and aluminum gutters so the system holds up to the coastal exposure.
Our GAF Master Elite systems carry high wind ratings and are installed with the manufacturer's full nailing and sealing spec, which matters on the exposed South Shore where nor'easters and storms like Superstorm Sandy have flooded low-lying blocks near the bay and torn shingles loose. Proper starter strips, ridge caps, and flashing are what keep water and wind out during those events.
Our base is in West Babylon, a short run west on Sunrise Highway and Montauk Highway, so we reach Islip quickly. We offer 24/7 emergency response for active leaks and storm damage and can tarp and stabilize a roof the same day before water spreads through the ceilings.
We cover the Islip hamlet (11751) and the surrounding Town of Islip, including East Islip, West Islip, Bay Shore, Central Islip, Sayville, and Great River, plus the neighborhoods near MacArthur Airport. Call (631) 669-6269 for a free local estimate.