Exposed Tree Roots
Hope to get some ideas from this forum regarding a tree we have with some extreme root exposure. It's on a lakeside bank which has eroded quite a bit. The tree is very healthy and growing straight (not tipping), but you can see right through from the top of the bank on one side to the water.
I would like to fill in the root cavity - mainly to prevent critters from moving in and doing tree damage, If I fill it with dirt/gravel I'm afraid it will eventually get washed away. I was wondering if I could fill the lower part with some expanding foam, and then dirt fill over that. Also thinking concrete, but not sure either would do more harm than good.
Any feedback would be great. Thank you!