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โ˜… 5.0 Star Rated GAF Certified Owens Corning Preferred Contractor

Flat Roof Replacement in NYC

Full tear-off, decking repair, and help choosing the right flat roof system โ€” EPDM, TPO, PMMA, or modified bitumen, installed correctly.

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โ˜… 5.0 Star Rated
โœ“ GAF Certified
โœ“ Owens Corning Preferred Contractor
โœ“ Licensed & Insured
Flat Roof Replacement

Replacing An Existing Flat Roof

When a flat roof has reached the end of its life โ€” persistent leaks, ponding water, membrane that's cracked or blistered โ€” a full replacement is usually the right call. We walk you through your options and handle the whole process, from tear-off to a new system installed correctly.

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Full Tear-Off

The old membrane and any waterlogged insulation is removed completely โ€” never installed over an existing failing roof.

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Decking Inspection

Decking is inspected for rot and water damage, with compromised sections replaced before anything new goes on.

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We Walk You Through The Options

EPDM, TPO, PMMA, and modified bitumen each have different costs and tradeoffs โ€” we help you pick the right one for your roof and budget.

See our Flat Roof Installation page for a full breakdown of each membrane system.

Why Choose SwiftBuild

Why Choose SwiftBuild

The membrane is only as good as the installation underneath it.

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Installed To Manufacturer Spec

Whichever system you choose, it's installed exactly to that manufacturer's requirements.

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25+ Years of Experience

Decades of flat roof replacement work across Queens, Brooklyn, and Nassau County.

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Written Warranties

Every job comes with a written workmanship warranty.

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Photos Through Every Stage

Tear-off, decking condition, and installation documented with photos.

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Transparent Pricing

A clear, itemized estimate before work starts โ€” including the cost difference between systems.

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Licensed & Insured

Fully licensed and insured for flat roofing work across NYC and Nassau County.

Our Process

How Flat Roof Replacement Works

1

Inspect The Existing Roof

We assess the current membrane, decking, and drainage to understand why it's failing.

2

Remove The Old Roof

Full tear-off down to the decking โ€” old membrane is never left in place under a new one.

3

Repair The Decking

Any rotted or water-damaged decking is replaced before insulation or membrane goes on.

4

Choose Your System Together

We review EPDM, TPO, PMMA, and modified bitumen with you and recommend what fits your roof and budget.

5

Install The New System

Insulation, membrane, seaming, and flashing installed to that system's manufacturer spec.

6

Final Walkthrough

We confirm proper drainage and walk the finished roof with you.

Flat Roof Replacement FAQ

Common Questions

If leaks are widespread, the membrane is cracked or blistered across large areas, or the roof is past its expected service life, replacement is usually more cost-effective than ongoing repairs. We'll give you an honest read during your estimate.
It depends on your budget, roof complexity, and how the roof is used. See our Flat Roof Installation page for a full comparison of EPDM, TPO, PMMA, and modified bitumen.
Yes, every estimate is free with no obligation. Call (516) 549-7665.

Get A Free Flat Roof Replacement Estimate

Serving Queens, Brooklyn & Nassau County.

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