Nine months later (right)
and most effective ways to protect the
earth from damage resulting from
development. Benefits are a
reduction of runoff which pollutes local
waterways and erodes the land,
reduction of the heat island effect
which is particularly important to
improve urban areas, insulation value,
habitat, and beauty and interest.
to support 35-50 lbs/sq ft additional load. The roof membrane
is root resistant (usually a high density epdm). We used
crickets and scuppers to drain off water not absorbed by the
green roof. Typically, plastic drainage plates (look like egg
cartons) are laid between two layers of thick wool-like fabric
and specially mixed dirt is layered on top. The dirt contains
lava rock or some other substance which is stable but light.
Plants are usually primarily sedum, but other varieties may be
used.
a few grasses and tree seedlings this first year,
but did not need to water, even during dry
periods.