Built-up roofing (BUR) and modified bitumen are both multi-layer asphalt-based systems for commercial flat roofs. For Essex County building owners, the choice between these traditional systems comes down to durability expectations, budget, and installation logistics.
System Construction Differences
Built-up roofing consists of alternating layers of bitumen and reinforcing fabrics (typically 3-5 plies), topped with a gravel or mineral cap surface. Modified bitumen uses pre-manufactured sheets of asphalt modified with polymers (APP or SBS) for enhanced flexibility and strength, applied in 2-3 layers.
BUR has been the commercial roofing standard for over a century and remains the most time-tested flat roofing system available. Modified bitumen is its modern evolution, offering similar durability with faster, more predictable installation.
Performance in Essex County
BUR's gravel surface provides excellent UV protection and adds ballast against wind uplift, important during NJ nor'easters. The multi-ply construction creates a thick, highly puncture-resistant membrane ideal for commercial buildings with rooftop equipment and regular maintenance foot traffic.
Modified bitumen offers comparable durability with better cold-weather flexibility thanks to polymer modification. SBS-modified products flex without cracking in NJ winters, while traditional BUR bitumen can become brittle below freezing. For Essex County buildings where winter roof access is needed, modified bitumen's flexibility is a practical advantage.
Making Your Choice
Choose BUR if you want the most time-proven system available, your roof gets heavy foot traffic, UV protection from gravel surface is desirable, or your existing roof is BUR and you want like-for-like replacement. Choose modified bitumen for faster installation, better cold-weather performance, lighter weight, or easier future repair access.
Budget comparison: BUR costs $6-$10 per square foot in Essex County. Modified bitumen runs $5-$8 per square foot. BUR's higher cost reflects the additional labor for multi-ply application.
Both systems provide proven, durable flat roofing for Essex County commercial buildings. BUR is the time-tested standard; modified bitumen is its more practical, modern alternative.