America and beyond. By the late 1970s and early 
1980s, MB membranes were introduced to the U.S. 
and Canadian roofing industries. Manufacturers 
adapted production techniques to meet regional 
climate conditions and regulatory standards, further 
accelerating adoption. The introduction of APP and 
SBS membranes revolutionized commercial roofing 
in North America, offering an alternative to asphalt-
based BUR systems. Advances in polymer research 
during this period also improved weather resistance, 
increasing the product’s appeal.
Growing urbanization and infrastructure development 
in Asia and the Middle East led to increased demand 
for reliable roofing solutions. In Latin America and 
Africa, the cost-effectiveness and durability of MB 
membranes made them a preferred choice for 
residential and commercial roofing in developing 
economies. Today, modified bitumen membranes are 
a global standard in low-slope roofing applications, 
with advancements in polymer technology 
further enhancing their performance. Additionally, 
regulatory shifts favoring environmentally friendly 
materials have encouraged further innovation in MB 
formulations.
Environmental Considerations and 
Sustainability 
Modified bitumen membranes are considered 
environmentally safer compared to fully synthetic 
membranes due to their faster biological 
decomposition rates. Studies indicate that MB 
membranes, particularly those with reduced polymer 
crystallinity, degrade more rapidly in nature than 
synthetic alternatives (Green Building Standards, 
‘Energy-Efficient Cool Roof Products’, 2023). 
Additionally, MB systems contribute to energy 
efficiency through reflective coatings and cool roofing 
technologies, reducing urban heat island effects and 
lowering cooling costs (Energy Star, ‘Cool Roofs 
Initiative’, 2023). 
Conclusion 
Modified bitumen membranes have 
revolutionized roofing technology, 
offering enhanced durability, 
flexibility, and sustainability. 
Their integration into global 
roofing standards highlights their 
importance in modern construction. 
As regulatory requirements for 
environmental responsibility grow, 
MB membranes will continue to 
evolve, incorporating innovative 
polymer blends and energy-efficient 
coatings. With their proven 
track record, modified bitumen 
membranes remain a reliable 
solution for commercial, industrial, 
and residential roofing needs. 
David G. Allen, from CRCA Associate 
Member firm, BITEC, Inc., has dedicated 49 
continuous years to the roofing industry and 
is a graduate of UA Little Rock. 
Throughout his nearly five decades in the industry, Allen has 
had a distinguished career in the roofing industry, playing a 
pivotal role in BITEC, Inc.’s growth and reputation. Early in his 
career, he assisted in expanding roofing technologies globally, 
contributing to international projects that advanced the adoption 
of innovative materials. His expertise was honed in the European 
www.mrca.org  —  Midwest Roofer
34
TECHNICAL & RESEARCH
Roofing 
Type 
Material 
Application Method 
Advantages 
Degradability 
 
 
 
 
 
PVC 
Polyvinyl Chloride 
Heat-welded 
High durability, 
chemical resistance 
Low – can persist in the 
environment for decades 
TPO 
Thermoplastic 
Olefin 
Heat-welded 
Energy-efficient, UV-
resistant 
Moderate – some formulations 
are recyclable 
EPDM 
Ethylene Propylene 
Diene Monomer 
Fully adhered, 
ballasted, or 
mechanically fastened 
Excellent weather 
resistance, flexibility 
Low – resistant to degradation, 
requiring special disposal 
methods 
BUR 
Built-Up Roofing 
Hot asphalt or cold 
adhesive 
Multi-layer durability, 
redundancy 
Moderate – asphalt components 
degrade over time but can be 
repurposed 
MB 
Modified Bitumen 
Heat-welded, cold-
applied, or self-
adhered 
High tensile strength, 
excellent weather 
resistance 
Variable – degradation rate 
depends on formulation and 
environmental exposure 
Figure 1. Comparison and Degradability 
Roofing Membrane Type Comparison and Degradability
Continued from page 33

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