Additionally, with vegetative roofing systems comes a marked increase in foot traffic and use of tools and equipment both small and large. Built up Roofing systems have proven far more resilient than single ply systems when it
comes to tool punctures and heavy foot traffic. Vegetative roofs also lead to the proliferation of insects and studies have shown EPDM particularly susceptible to bore holes, an issue unseen with BUR. Finally, and perhaps most importantly, Built up Roof systems comparative longevity
and low maintenance costs are key factors in offsetting the cost of maintaining vegetative roofs.