anybody know where I can get information on how to engineer the load for a green roof?
Oh and welcome Chris Magwood, look forward to reading your post here this week
Thanks for the welcome, Tim. This is certainly a warm online community!
Our green roof builder (Leslie Doyle at Restoration Gardens) gives me these general rules of thumb for fully saturated green roof weights:
Extensive (thin growing medium, mostly sedum-based plantings): 10-35 lb/sf
Semi-intensive (soil/growing medium hybrid, flowers and grasses): 35-50 lb/sf
Intensive (soil, flowers, grasses, vegetables & small shrubs): 50-300 lb/sf
These are still pretty wide ranges, but will give you some idea. Of course, you must add the full snow load to these figures in cold climates.
Hope this helps!
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