2-Ply Mod Bit Roofing by Bay Roofing and Exteriors Ltd.
When you need a commercial flat roofing system that delivers reliable waterproofing, strong durability, and proven long-term performance, 2-ply modified bitumen (Mod Bit) roofing is a trusted choice. At Bay Roofing and Exteriors Ltd., we install and service commercial 2-ply Mod Bit roofing systems built to handle demanding weather conditions and protect your property year-round.
Whether you’re reroofing an older flat roof or planning a new commercial project, our team delivers high-quality workmanship and roofing systems designed for long-term value.
Contact us today for a quote or to book a commercial roof assessment.
Modified bitumen roofing is a multi-layer flat roofing system made from asphalt-based materials reinforced for strength and flexibility.
A 2-ply Mod Bit system typically includes: A base sheet (first layer) for stability and structure, A cap sheet (top layer) designed for weather resistance and protection.
These layers are installed to form a durable roofing membrane that resists water penetration and stands up well to day-to-day commercial wear.
What Is 2-Ply Modified Bitumen Roofing?
Why Choose 2-Ply Mod Bit for a Commercial Roof?
Durable Protection for Flat Roofs
2-ply Mod Bit is designed for commercial performance. It offers strong resistance to impact, punctures, and rooftop traffic, making it ideal for buildings with equipment or regular maintenance access.
Dependable Waterproofing
The layered system adds redundancy, improving overall roof strength and leak resistance. When installed properly, it creates a solid barrier against moisture intrusion.
Flexible and Weather-Resistant
Modified bitumen is engineered to expand and contract with temperature changes—helping it perform through seasonal cycles without cracking as easily as older roofing materials.
Ideal for Many Commercial Buildings
2-ply systems are a great fit for:
- Warehouses and industrial buildings
- Retail plazas and office buildings
- Multi-unit and mixed-use properties
- Commercial additions and renovations
- Flat and low-slope roof structures
Our 2-Ply Mod Bit Commercial Roofing Services
New 2-Ply Mod Bit Installation
We install 2-ply systems using proven installation practices and attention to detail around drains, edges, penetrations, and flashing points—because the details are what protect your building long term.
Mod Bit Roof Replacement
If your existing flat roof is aging, leaking frequently, or approaching the end of its service life, we can remove and replace it with a modern 2-ply Mod Bit system designed for dependable performance.
Mod Bit Repairs and Leak Service
Not every roofing issue requires replacement. We assess the condition of the roof and perform targeted repairs to restore waterproofing and prevent further damage.
Maintenance and Roof Assessments
Regular inspections can extend roof life and reduce unexpected expenses. Our team offers assessments that help commercial owners stay ahead of wear, drainage issues, and seam vulnerabilities.
Signs Your Mod Bit Roof May Need Service
If you’re noticing any of the following, it may be time for repairs or an inspection:
- Leaks or water stains inside the building
- Soft spots or signs of trapped moisture
- Visible cracks, blisters, or surface wear
- Damaged flashing at roof edges and penetrations
- Ponding water (standing water after rainfall)
- Repairs showing up repeatedly in the same area
Bay Roofing and Exteriors Ltd. will inspect the roof and recommend the most cost-effective path forward.