Building garage foundation near mature willow oak tree

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Old 08-15-05, 10:41 AM
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Building garage foundation near mature willow oak tree

Does anyone here have any experience with building a foundation over tree roots?

We would like to build a garage, located well within the dripline of a large oak tree.

The tree is big, mature, beautiful willow oak. We would much like to keep it!

Unfortunately, the property is such that a garage will only fit in this corner; so it is garage near tree or no garage.

Digging a trench for the edge of the foundation will likely kill about 25% of the root structure.

But we could dig two trenches parallel to the tree root system, killing a lot less roots. Then bridge over the trenches; i.e. have a foundation only anchored on the sides.


Am I making sense ... is this crazy?

Any experience, thoughts, suggestions appreciated!

(This is cross-posted in the Concrete forum.)
 
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Old 08-15-05, 04:37 PM
Join Date: Dec 1999
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I guess its up to you, but I would cut through the root. 25% of roots will not hurt that tree. Even if you cut through the root, it is very likely that the roots will grow up into the concrete, or under the concrete and make it rise and crack. That is what will happen. Now you have to decide. Good Luck
 
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