EPDM
Synthetic rubber membrane in large sheets, with fewer seams to maintain.
EPDM roofingFlat Roof Replacement Services in Bronx, NY
Replacing a flat roof means rebuilding a full system. We handle insulation, slope, membrane, and every edge, planned around the people who use the building below.
Complete Flat Roof Replacement
Replacement rebuilds your roof system. The old membrane comes off or is prepared, and we correct insulation and slope before the new roof goes on, fixing the parts that caused the old roof to fail.
When Should a Flat Roof Be Replaced?
- Leaks in several places, not just one. The membrane is failing broadly and patches only move the problem.
- Insulation that tests wet. Moisture readings or infrared scans showing saturation mean the system beneath has failed.
- Widespread blistering, cracking, or seam failure. A few defects can be repaired, but surface-wide failure cannot.
- Permanent ponding. Sagging areas that hold water year after year keep testing every seam.
- A roof covered in old patches. A long repair history is telling you where the roof keeps failing.
Flat Roofing Systems We Install
Our Flat Roof Replacement Process
Tear-Off
The membrane and insulation are removed to the deck, exposing hidden damage.
Deck Repair
We repair damaged decking so the new system has a sound, dry base.
Tapered Insulation and Slope
We correct slope toward the drains, the most reliable fix for ponding.
Drains and Edges
Drains, scuppers, parapets, and edge metal are replaced or renewed.
Membrane Installation
The new membrane is installed to manufacturer specification, with every seam detailed by hand.
Choosing the Right Flat Roofing System
The membrane matters, but the installer and the details matter just as much. We help you weigh EPDM, TPO, and modified bitumen against your budget, how the roof is used, and how long you plan to own the building.
Flat Roof Replacement Cost Factors
| Factor | How It Changes the Job |
|---|---|
| Roof size | More area means more material, labor, and disposal. |
| Insulation condition | Wet insulation must be replaced, adding scope once the old roof is off. |
| Membrane choice | EPDM, TPO, and modified bitumen differ in material and labor cost. |
| Slope correction | Adding tapered insulation to fix ponding adds material and design time. |
| Drains and equipment | Rooftop units, drains, and penetrations add detail work. |
| Access and staging | Tall buildings and tight sites affect equipment and time. |
Flat Roof Repair vs. Replacement
Replacement Fits When
- Failures are spread across the roof.
- Insulation is saturated.
- Repairs have become frequent and costly.
Repair Fits When
- Damage is limited to one area.
- The membrane elsewhere is sound.
- This is the first repair in that spot.
Commercial Flat Roof Replacement
On apartment buildings and commercial properties, we plan replacement around tenants, rooftop equipment, and access, and can phase the work to reduce disruption. See commercial roof replacement for more.
Frequently Asked Questions
How long does a flat roof replacement take?
Most residential-scale flat roofs are replaced in two to five days, depending on size and whether slope correction is needed. Larger commercial roofs take longer and are often phased.
Can you replace a flat roof without removing everything?
A recover, installing a new membrane over the old one, is possible when the existing roof tests dry and sound. It only works if insulation is dry, and codes limit how many layers a roof can carry.
Do you fix ponding water during replacement?
Yes. Tapered insulation that builds a gentle slope toward the drains is the most reliable way to stop ponding, and we address it as part of most replacements.
What is the difference between EPDM, TPO, and modified bitumen?
EPDM is a synthetic rubber sheet, TPO is a heat-welded reflective membrane, and modified bitumen is a layered asphalt-based system. Each has strengths, and the best choice depends on your roof and budget.
How much does a flat roof replacement cost?
Cost depends on roof size, membrane choice, insulation condition, and roof complexity. We provide a written estimate after inspecting your roof.
Can you replace a flat roof while my building stays occupied?
Yes, for most residential and commercial flat roofs. We plan access, staging, and daily cleanup around your building's normal use.
Call Bronx Roofing Pros
Request a Flat Roof Replacement Estimate
Describe your building and roof and we will walk you through your options. Call (718) 719-0780.
(718) 719-07802243 White Plains Rd, Bronx, NY 10467