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Originally Posted by Arm&Kedzie
You can grow 30' trees in 3' of soil... if you pick the correct trees (Birch, Carpinus, etc.) . I design/install them on residential rooftops all the time.
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That's pretty surprising, actually. How do trees with such shallow root systems hold themselves upright in adverse atmopheric conditions?
Typically trees of that size have 7 to 9' deep root systems, not just for stabilization but also for access to deep soil water. During dry spells, the top layers of soil dehydrate to the point where transpiration and capillary action cant really keep the tree adequately hydrated.
Quote:
Originally Posted by Kumdogmillionaire
Adding to that, I've seen 40 foot trees growing out of rocks on cliffs a million times. That dude is just looking for something to complain about when it comes to this project
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Trees that grow out of cliff side rocks typically have grown out of a crack where they can access soil in order to procure nutrients and water, which (adversely to your argument) necessitates a deep root system. The rock itself doesn't sustain the tree.
And yes, I do dislike the location of this garage, especially with existing empty lots in the immediate vicinity available.