Roof Repair on Long Island
Doon Construction Corporation provides fast, licensed roof repair across Long Island — Nassau County and western Suffolk. We respond to active leaks within 24 hours (most often same-day), stop water entry immediately with tarping or emergency patching, and follow up with a permanent fix backed by a written workmanship warranty.
Long Island roofs take a beating: nor'easters off the South Shore, summer storms, ice damming in winter, and salt-air exposure year-round. Most leaks aren't from the field of the roof — they come from flashing, valleys, chimney counter-flashing, skylight curbs, vent boots, and ice-dam damage at the eaves. Those are exactly the repairs our crews handle every day.
Roof Repairs We Handle
- Active leak repair (same-day dispatch)
- Shingle replacement and re-nailing
- Flat-roof patch and seam re-seal
- Flashing repair (chimney, valley, sidewall)
- Skylight reseat and re-flash
- Chimney crown, cap, and counter-flashing
- Gutter, downspout, and ice-dam repair
- Storm and wind-damage repair
- Vent boot and pipe collar replacement
- Soffit, fascia, and drip-edge repair
Our Repair Process
Step 1 — Diagnose: Most leaks don't show up where the water enters the roof. We start with a full visual inspection of the roof, attic, and entry point to identify the actual source. Step 2 — Stabilize: For active leaks we tarp or patch immediately to stop interior damage. Step 3 — Quote: You get an itemized written estimate before any paid work begins. Step 4 — Repair: Most repairs are completed in a single day, with a 10-year workmanship warranty in writing. Step 5 — Insurance documentation: When storm damage is involved, we provide the photos and written report adjusters need.
Long Island Towns We Serve
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Roof Repair Long Island — FAQ
How fast can you respond to a roof leak on Long Island?
We dispatch roof-repair crews on Long Island within 24 hours, and most often same-day for active leaks. Every truck carries tarping, emergency patching, and waterproofing materials so we can stop water entry immediately while a permanent repair is scheduled.
How much does a roof repair cost on Long Island?
Most Long Island roof repairs run $400 to $1,800 depending on the damage type. Small repairs (replacing a few shingles, sealing a vent boot, patching flashing) start around $400. Larger repairs (skylight reseat, valley re-flash, partial shingle replacement) typically run $900–$1,800. Storm damage and structural repairs are quoted on-site with a written estimate.
What types of roofs do you repair?
We repair all common Long Island roof types: asphalt shingle (architectural and three-tab), flat roofs (TPO, EPDM, modified bitumen), metal roofing, cedar shake, and slate. We also handle gutter repair, flashing, chimney work, skylights, and storm-damage restoration.
Which Long Island towns do you cover?
We cover all of Nassau County and the western portion of Suffolk. Towns include Hempstead, North Hempstead, Oyster Bay, Glen Cove, Long Beach, Hicksville, Levittown, Garden City, Mineola, Freeport, Valley Stream, Massapequa, Syosset, Bethpage, Westbury, and surrounding areas.
Will my homeowner's insurance cover the repair?
Storm-damage repairs (wind, hail, fallen tree limbs, ice damming) are often covered by Long Island homeowner's policies. We document damage with detailed photos and written reports formatted for insurance claims, and we work with adjusters directly to make the process easier.
Do you do full roof replacements too?
Yes. If a roof is past the point of cost-effective repair, we install full asphalt-shingle, metal, and flat-roof systems with manufacturer warranties plus our 10-year written workmanship guarantee. See our Roofing Contractors Nassau County page for full-replacement detail.