Torch Down Roofing vs Rubber Roof (EPDM): Which Is Better for NYC Buildings?

Updated June 2026 · 8 min read · By NYC Flat Roof Pros

If you're replacing a flat roof in Queens or Brooklyn, you've probably heard about two main options: torch down roofing (modified bitumen) and rubber roofing (EPDM). Both are proven systems used on thousands of NYC buildings — but they have very different strengths, costs, and ideal applications.

This guide breaks down the real differences based on our 15+ years of installing both systems on NYC buildings.

Quick Comparison

What Is Torch Down Roofing?

Torch down roofing — technically called modified bitumen — is a multi-layer flat roof system applied with a propane torch. The installer heats the underside of the membrane roll until the asphalt coating melts, then rolls it onto the roof surface, creating a seamless waterproof bond.

Most NYC installations use a 2-ply or 3-ply system:

• Base sheet — mechanically fastened or self-adhered to the roof deck
• Cap sheet — torch-applied on top with a granulated surface for UV protection
• Optional 3rd ply — adds extra waterproofing and extends lifespan

Torch Down Pros

• Proven performance in NYC climate (handles freeze-thaw cycles well)
• Redundant waterproofing from multiple layers
• Easy and inexpensive to repair (patch with more torch-down material)
• Can be installed in colder temperatures
• Most NYC roofers are experienced with it
• Good puncture resistance from multiple layers

Torch Down Cons

• Open flame during installation (fire risk, especially on occupied buildings)
• Heavier than single-ply options (adds weight to aging structures)
• Shorter lifespan than EPDM
• Seams can separate over time if poorly installed
• Not ideal for very large flat areas (more seams = more potential failure points)

What Is Rubber Roofing (EPDM)?

EPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber membrane that comes in large sheets — sometimes large enough to cover an entire roof with a single piece. It's adhered, mechanically fastened, or ballasted (held down by gravel or pavers).

EPDM Pros

• Longest lifespan of any affordable flat roof system (25-30 years common)
• Excellent UV and ozone resistance
• Lightweight — doesn't add structural load
• No fire risk during installation
• Fewer seams on large roofs (larger sheets available)
• Environmentally friendly (recyclable)
• Stays flexible in extreme cold

EPDM Cons

• Single membrane — one puncture and water gets in
• Seam adhesive can fail over time (seam-related leaks are common)
• Black color absorbs heat (increases cooling costs in summer)
• Harder to repair than torch down (requires specific primers and adhesives)
• Shrinks over time, pulling at edges and flashings
• Installation temperature-sensitive (adhesives need 40°F+)

Which Is Better for NYC Buildings?

What About TPO?

There's a third option growing in popularity: TPO (Thermoplastic Polyolefin). TPO is white, reflects heat, and has heat-welded seams that are extremely strong. It's becoming the standard for new commercial construction in NYC. However, it's newer technology with less long-term track record than torch down or EPDM.

TPO is worth considering if energy efficiency is a priority (the white surface reflects sunlight and reduces cooling costs) or if you're building new and want the most modern system available.

Cost Comparison for a Typical Queens/Brooklyn Building

For a typical 1,500 sq ft flat roof on a residential building in Queens or Brooklyn:

• Torch Down (2-ply): $6,000-$10,000 installed
• Torch Down (3-ply): $8,000-$12,000 installed
• EPDM Rubber (fully adhered): $8,000-$14,000 installed
• TPO: $9,000-$15,000 installed

Prices include tear-off of old roof, new insulation, membrane installation, and all flashings. Actual costs depend on building access, number of penetrations, and condition of the roof deck.

Our Recommendation for Most NYC Buildings

For the majority of residential buildings in Queens and Brooklyn — brownstones, row houses, and 2-6 family homes — torch down (modified bitumen) remains the best choice. Here's why:

1. NYC has thousands of experienced torch-down installers (quality is consistent)
2. Repairs are simple and affordable (any roofer can patch it)
3. The multi-layer system provides redundant waterproofing
4. It handles NYC's freeze-thaw cycles better than any single-ply membrane
5. Installation isn't weather-dependent like EPDM

For commercial buildings over 5,000 sq ft, EPDM or TPO often makes more sense economically and performance-wise.

Questions to Ask Your Roofer

When getting quotes for a flat roof replacement, ask these questions:

1. What system do you recommend for my specific building, and why?
2. How many plies/layers are included in the price?
3. What manufacturer's materials do you use?
4. Is a full tear-off included, or are you going over existing layers?
5. What warranty do I get — both manufacturer and workmanship?
6. How do you handle flashings at walls, pipes, and edges?
7. Are you licensed and insured to work in NYC?

A quality roofer will answer all these questions without hesitation. If they can't — or won't — that's a red flag.