Expected Lifespan
20–25 years
Install Method
Mod-Bit system
Best Applications for Mod-Bit
Mod-Bit is the right material when one or more of these conditions describe your building:
- Buildings with significant rooftop HVAC equipment requiring regular service
- Roofs with high foot traffic from maintenance and contractors
- Older buildings with complex parapets and brick walls
- Owners who want redundancy of multi-ply over single-ply
- Restaurants where grease drips onto walking paths
Mod-Bit System Specifications
- Two-ply system (base sheet + cap sheet) with optional third interplay
- SBS (rubberized) or APP (plasticized) modifier options
- Torch-applied, cold-applied adhesive, or self-adhered options
- Granular-surfaced cap sheet for UV protection and walkability
- 20–25 year manufacturer warranties available
- Easy field repair with same-system materials
How We Install Mod-Bit
Substrate is prepared with primer or base sheet. Two membrane plies are applied — the base sheet first, then the cap sheet — using torch flame (most common), hot bitumen, or cold adhesive depending on building conditions and fire-safety requirements. Seams overlap and bond chemically. Flashings, penetrations, and parapets are reinforced with extra membrane patches.
Mod-Bit — Pros & Cons
Strengths
- Multi-ply redundancy survives punctures and damage better than single-ply
- Excellent for buildings with regular rooftop foot traffic
- Field repair is straightforward with same-system materials
- Long history and proven performance in NJ climate
- Granular surface looks more 'finished' than smooth single-ply
Trade-offs
- Torch-applied installation has real fire-safety risks on occupied buildings
- Heavier than single-ply — older building decks may need structural review
- Less energy-efficient than white single-ply (granular surface usually grey or tan)
- Slower install than mechanically-attached single-ply
Mod-Bit — Frequently Asked
When should I choose Mod-Bit instead of TPO or EPDM?
Mod-Bit when the roof sees significant foot traffic (HVAC contractors, regular equipment service), when the building has complex parapets or detailing that benefits from membrane redundancy, or when previous single-ply systems failed early due to puncture damage. For simpler buildings with minimal foot traffic, single-ply is usually the better value.
Is torch-applied modified bitumen safe?
Torch-applied install is the most common method but does require strict fire-safety protocols — fire watch during and 2+ hours after work, charged hoses on the roof, fire extinguishers, no torching near combustible parapets. For occupied buildings or buildings with combustible decks, we often use cold-applied adhesive or self-adhered systems instead.
How long does Mod-Bit last in NJ commercial buildings?
Quality modified bitumen systems typically last 20–25 years in NJ. Annual inspections to catch seam blistering or splits early extend life toward the upper end of that range.
Can Mod-Bit be installed over existing roofs?
Yes, in many cases — Mod-Bit can go over a single existing roof layer (asphalt or single-ply) with the right base preparation. The added weight is a consideration on older buildings; we evaluate structural capacity before quoting a recover project.
Other Commercial Roof Systems
Not sure Mod-Bit is right for your building? Compare with these alternatives:
TPO
TPO (Thermoplastic Polyolefin) Roofing
The most-installed commercial flat-roof membrane in New Jersey
EPDM
EPDM (Rubber Membrane) Roofing
Proven 30+ year flat-roof material for NJ commercial buildings
PVC
PVC (Polyvinyl Chloride) Roofing
Chemical-resistant flat-roof membrane for restaurants and industrial
Metal
Commercial Metal Roofing
Standing-seam and structural metal for warehouses and industrial