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Tree roots and walls
The ground surface behind the 5 foot high stone wall in the back of
garden is about 5 foot higher than my garden surface. The wall was built on a 3 or 4 inch foundation of broken stones. There was no cement put into the foundation. Tree roots from the ground behind the wall (there's a line of quick growing conifers about 4 foot behind the wall, and there's a Finish White Beam and a tall Poplar tree) have squeezed under the foundation and then proceeded to fan out over the surface of my lawn and damaged it. Below about 4 or 5 inch of the ground surface I have sandy stony ground. I'm redoing the lawn and the wall. I'm going to keep the old wall in place, and put a brick wall in front of it with a proper cemented foundation. This new wall will be spaced about 2 inch away from the old wall. I've got some pavement flags (slabs) 2 goot by 2.5 foot, 2 inch thick. I'm going to put them in the ground adjacent to the base of the old wall, with about 6 inch sticking up above ground surface. So, the flags will penetrate 1.5 foot below my ground surface just in front of the old wall. Then I'll fill the 2 inch gap between the walls with stones. Okay, is this going to divert any roots downwards from under the old wall, into the sandy rocky soil and stop roots growing on the surface of my lawn? TIA. |
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