For a conventional roof.
Extensive green roof design.
Intensive green roofs require the deepest soil and have the greatest impact on the structural design but they also accommodate all types of plantings including large shrubs and trees.
Extensive vegetative green roofs which are 6 inches or shallower and are frequently designed to satisfy specific engineering and performance goals extensive design typically gives the owner the highest benefit to cost ratio.
This is not desirable on an extensive vegetative roof which is not designed to support these habitats.
Extensive green roof an extensive green roof system is characterized of its vegetation ranging from sedums to small grasses herbs and flowering herbaceous plants which need little maintenance and no permanent irrigation system the growing medium depth for an extensive green roof system is typically 6 inches or less.
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Green roof design may be considered differently for stormwater retrofits.
A 2006 study by the university of michigan comparing costs of conventional and green roofs showed that on average installing a green roof costs about 22 00 sq.
Most of these projects like the academy s are standard extensive green roofs as now defined.
Offers modular extensive green roof products such as hydropack stormwater management solutions and green roof solutions for any pitch using acropack.
A smaller residential roof may accomplish some of the same environmental goals but full.
These systems are ideal for efficient stormwater.
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This style of roof is usually designed to be almost self sustaining with very minimal weight or maintenance.
Successful stormwater management plans will combine appropriate materials and designs specific to each site.
Extensive green roofs.
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In most climates a properly designed extensive vegetative green roof cover will provide a durable low maintenance system that can realize the many benefits that.
The design of green roofs is not limited to the examples shown within this text which focuses primarily on extensive green roofs.
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Extensive green roofs are usually designed for 10 25 pounds of vegetation installed per square foot on the green roof.
Insects spiders snails birds and rodents rats mice squirrels all promote damage to the.
8 to 20 per square foot.
Vegetation growing in a shallow 3 to 6 inch layer of lightweight soil medium contained in a special assembly system over a waterproof membrane.
Successful extensive green roofs result from a holistic design approach influenced by regional climates rooftop microclimates plant needs and most importantly the green roof goals.
Intensive systems allow the designer to create a park like setting so they are the best option for roof gardens that will be occupied.
