Download - Design Aspects of the Arboretum Green Roof
Design Aspects of the Arboretum Green Roof
Green Roof Symposium
Project Issues:
• Shady location• Close to natural grade• Teaching tool for arboretum
University Issues:
• Risk Management - 70% lawsuit/roof failures ratio• Maintenance• Warranties• BCOM Approval
A Short History of Roofs…
there are several types of roofs:
roofs that shed water:
▪ metal roofs▪ shingle roofs
A Short History of Roofs…
roofs that are barriers:
▪ EPDM▪ TPO▪ Modified Bitumen▪ PVC
▪ single-ply roofs (sheets) -
▪ liquid-applied membranes
there are several types of roofs:
A Short History of Roofs…
typical single-ply installations:
there are several types of roofs:
A Short History of Roofs…
IRMA roofs:
there are several types of roofs:
A Short History of Roofs…
green roofs:
there are several types of roofs:
▪ extensive/intensive▪ planted in place
▪ green grid
green roofs:
the JMU Arboretum will be extensive
green roofs:
▪ extensive/intensive
advantages:▪ wrap around warranty ▪ membrane by a reputable local installer
disadvantages:▪ more costly to repair leaks▪ single supplier requires exemption from BCOM▪ immature plants may be installed in summer, requiring watering
green roofs:
▪ planted in place
green roofs:
▪ green grid
advantages:▪ grids are removable for repair▪ can be installed on any roof membrane▪ plants can be installed later, once established & more mature
disadvantages:▪ no wrap around warranty with preferred roofing manufacturer▪ possible additional cost▪ single-source exemption from BCOM▪ available details▪ warranty
critical steps:
▪ provide information on each system▪ technical information▪ research references for each system▪ find installations for client to view▪ create comfort with decision
architect as advisor:
JMU arboretum