Bohemia is two roofing markets on one grid: subdivision residential, and the flat-roofed commercial and industrial stock along the MacArthur corridor — shops, warehouses, flex buildings and offices. We work both, and the flat-roof side deserves the explanation because almost everything owners believe about it is shingle logic that does not transfer.
Flat roofs fail by water management, not by age
- Ponding is the enemy: water standing 48 hours after rain is degrading the membrane and loading the deck. The fix is drainage — added drains, tapered insulation to move water — not thicker membrane over a birdbath
- Seams and penetrations, not the field, are where EPDM and TPO leak: every HVAC curb, vent, and pipe boot is a detail with a lifespan
- The membrane choice is a use-case call: EPDM is the proven, repairable default; TPO's white surface earns its premium over conditioned space where summer heat gain costs real money
- Recover vs. replace has rules — one recover over a dry existing roof is legitimate; recovering over wet insulation entombs the problem, and a moisture scan settles the question before anyone quotes
What a commercial owner should demand in a scope
A core cut or moisture scan before the number, drainage addressed as line items, every penetration counted and detailed, edge metal and termination spec, and a maintenance reality: a flat roof wants a twice-yearly walk — drains cleared, seams eyed, punctures caught small. Most corridor roofs we are called to have never been walked between failures, and the difference between a $600 seam repair and a $60,000 replacement is usually two years of neglect.
The residential side, briefly
Bohemia's housing is standard flat-lot subdivision stock — predictable geometry, one-to-two-day re-roofs, the usual ventilation checks. Its one local note is the same one the driveways carry: households along the corridor run work vehicles and equipment, and garage and shop outbuildings here are often oversized and worth rolling into the same mobilization.
One contractor, both roofs
A meaningful share of Bohemia owners have one of each — the house, and the shop or small commercial building their business runs from. Carrying both trades on one crew means the pitched and flat work quote together, mobilize together, and answer to the same warranty.
Frequently Asked Questions
Water sits on my commercial flat roof after rain. Is that normal?
Standing water that is gone within a day or two is normal; ponding that persists 48 hours is actively degrading the membrane and loading the deck. The fix is drainage — added drains or tapered insulation to move the water — not a thicker membrane installed into the same birdbath. Any flat-roof quote that ignores the ponding is treating the symptom you can see and skipping the cause.
EPDM or TPO for my building?
EPDM is the proven, repairable default and the usual answer. TPO's reflective white surface earns its premium over conditioned space — offices, retail — where summer heat gain costs real money every month. Over an unconditioned warehouse, reflectivity buys little. It is a use-case decision, not a fashion one.
How long does a roof replacement take?
One to two days for a typical Long Island house. Tear-off and dry-in happen the same day — we never leave a roof open overnight.
Related Reading
- Flat and Low-Slope Roofs — EPDM, TPO and where they fail
- Commercial Roofing Services — flat and low-slope, scoped properly
- Comparing Roofing Quotes — the checklist every bid must answer
- Roof Replacement Cost on Long Island — what drives the number
- Hiring a Roofing Contractor — the questions that separate bids
- Roof contractor in Lake Ronkonkoma — three jurisdictions, one roof
Also Serving Bohemia
- Attic Insulation in Bohemia — air sealing, baffles and R-49 depth
- Basement Finishing in Bohemia — egress, ceiling height and moisture
- Bathroom Remodeling in Bohemia — full gut renovations
- Driveway Paving in Bohemia — blacktop, resurfacing and repairs
- Fallen Tree Removal & Roof Repair in Bohemia — tree off the house, roof supported and repaired
- Flood & Water Damage Cleanup in Bohemia — wet material out, drying metered
- Gutter Installation in Bohemia — seamless gutters, fascia and drainage
- Hurricane & Storm Damage Repair in Bohemia — trees, flooding, cleanup and repairs
- Interior Painting in Bohemia — the right work for the cold months
- Kitchen Remodeling in Bohemia — cabinets, counters and layout
- Storm Debris Removal & Cleanup in Bohemia — trees, building debris and hauling
- Storm Roof & Siding Repair in Bohemia — wind damage, tarped and rebuilt
Work With Alec's Construction
This guide is written by the crew that does the work. See Alec's Roofing service — tear-offs, repairs, flashing and storm damage across Suffolk and Nassau. Licensed and insured on Long Island, one crew start to finish, free walkthrough and a written estimate inside 48 hours.
Booking the cold months now: we also handle Seamless Gutters and Storm Damage & Insurance Restoration.
We pull the permits on our own jobs — if you need the building department for your town, we keep a current directory of all 23 Long Island permit offices.
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Free roof inspection with photos of what we find and a written scope listing underlayment, ice-and-water coverage and ventilation. Nassau and Suffolk County.