
|
Strong uphill winds have pushed against the tree.
http://wiki.answers.com/Q/What_is_the_most_likely_...
|
|
Trees that make surface roots or are shallow rooted are bad and those that love moist conditions, like willows, are the worst offenders. Here is a list of shallow rooted trees: Acer
http://www.answerbag.com/q_view/567637
|
|
Recommendations to remove trees because of the risk of structural damage or subsidence caused by roots have become more common. This is a highly specialised area of concern to engineers
http://www.querycat.com/question/a49be6aaeeade4efe...
|
|
Insurance companies use 30 feet as a guide. In reality I'd be worried if it was less than that. Above that, the roots will be nutritanal feeders and not structural for the tree, so
http://uk.answers.yahoo.com/question/index?qid=200...
|