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Man, if this will tip anyone off ahead of concrete replacement IÔÇÖll be glad - if IÔÇÖd had any inkling 4 years ago I couldÔÇÖve trenched between the driveway and trees in question and saved ourselves a bundle! (Of course, there are electric and irrigation lines down there somewhere so, more on that idea later)
In a nutshell we thought our concrete driveway beginning to crack was either a chronic issue (I.e., drainage, etc) or acute occurrence (I.e., many many ton propane truck deliveries, etc)
Even a local arborist was shocked we found Virginia pine roots as thick as 5ÔÇØ under the concrete and weirdest part of all is the roots are (well, WERE) only 1-1/2ÔÇØ at the point they went from a few inches below the soil to just under the edge of the 4+ÔÇØ thick concrete pad. (Once under the concrete the roots expand in diameter the farther they advance under the pad. Kinda weird seeing roots ÔÇ£fattenÔÇØ the farther they get from the trunk.
On the bright side (we live in a ÔÇ£planned communityÔÇØ under NC law with rules about getting approval before felling trees in excess of a certain girth) the POA was swift in saying, ÔÇ£Take ÔÇÿem down!ÔÇØ
NOTE: Please do not start discussion of the obvious - the ills of HOA/POAÔÇÖs and sidetrack the point of this - IF YOU HAVE TREES WITHIN 15-FEET OF YOUR DRIVEWAY LET OUR EXPEN$IVE EXPERIENCE HELP YOU AVOID REPAIR$!!!!
What a pia - some of the remaining trees are IN EXCESS OF 110- feet TALL! which I have a chance to get ahead of (there is another spot further down the driveway where cracking is starting and I found the root coming off the tall pine is OVER NINE INCHES in diameter where the root leaves the trunk at soil level and heads straight down, UNDER a massive brick retaining wall and up under the adjacent concrete pad!
Im in the process of excavating that / those roots now in order to chainsaw them but not ruin my blade (IÔÇÖll probably mark a storage bag and relegate this blade to such chores for future and go with a new chain for regular timber sectioning)
Did I mention what an expensive PIA this all is?
Hope this helps save someone else a simi,ar headache / expense 
In a nutshell we thought our concrete driveway beginning to crack was either a chronic issue (I.e., drainage, etc) or acute occurrence (I.e., many many ton propane truck deliveries, etc)
Even a local arborist was shocked we found Virginia pine roots as thick as 5ÔÇØ under the concrete and weirdest part of all is the roots are (well, WERE) only 1-1/2ÔÇØ at the point they went from a few inches below the soil to just under the edge of the 4+ÔÇØ thick concrete pad. (Once under the concrete the roots expand in diameter the farther they advance under the pad. Kinda weird seeing roots ÔÇ£fattenÔÇØ the farther they get from the trunk.
On the bright side (we live in a ÔÇ£planned communityÔÇØ under NC law with rules about getting approval before felling trees in excess of a certain girth) the POA was swift in saying, ÔÇ£Take ÔÇÿem down!ÔÇØ
NOTE: Please do not start discussion of the obvious - the ills of HOA/POAÔÇÖs and sidetrack the point of this - IF YOU HAVE TREES WITHIN 15-FEET OF YOUR DRIVEWAY LET OUR EXPEN$IVE EXPERIENCE HELP YOU AVOID REPAIR$!!!!
What a pia - some of the remaining trees are IN EXCESS OF 110- feet TALL! which I have a chance to get ahead of (there is another spot further down the driveway where cracking is starting and I found the root coming off the tall pine is OVER NINE INCHES in diameter where the root leaves the trunk at soil level and heads straight down, UNDER a massive brick retaining wall and up under the adjacent concrete pad!
Im in the process of excavating that / those roots now in order to chainsaw them but not ruin my blade (IÔÇÖll probably mark a storage bag and relegate this blade to such chores for future and go with a new chain for regular timber sectioning)
Did I mention what an expensive PIA this all is?
Hope this helps save someone else a simi,ar headache / expense 
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