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When required, sheet metal cap flashings shall
continuously cover thermoplastic membrane flashing installed at
horizontal to vertical roof junctions. Sheet metal cap flashings
shall be installed as soon as practical to protect the membrane
flashing from damage.
A protected membrane roofing design is an
insulated and ballasted roofing system in which the primary
insulation is applied above the thermoplastic membrane and retained
in place by ballast.
Re-roofing encompasses both primary membrane
replacement and replacement of the entire roofing assembly above
the structural deck.
Due to the unique nature of re-roofing, relief
A vegetated roof design (green roof) is defined
as a roof membrane system with a top layer of living plants in an
engineered soil blend (growth medium). System components include a
membrane protection layer, drainage layer, filter layer and a root
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