I'm stumped. Need help with stump.

[RopeShield]

We removed this tree a few months ago for a customer. It was grown next to building and a cinderblock wall. I told him I wouldn't be able to grind the stump due to its location and that it has concrete blocks grown in it. Fast forward 3 months and now he is rebuilding the wall and grading dirt. The new wall needs to be right down the middle of the stump due to lot lines. I told him to excavate it out but after excavating some dirt we discovered the building didn't have the footer it should have been built with and instead was poured on a slab only. That means the tree roots are growing under the garage floor. Excavation will likely ruin the garage floor and create a cavity under the building. My initial thought is build an earth ramp to the stump and just grind through it, concrete and all. I hate to do that to my machine and teeth.

The mulberry stump is impregnated with lots of concrete. What is the best way to remove this stump without damaging the garage? Your input is much appreciated.

Chainsaw digger to clean away all to clean wood than do the rest with another saw.

 

[guymayor]

I'm with Tom; Excavate with air, and cut the roots going under the building? If you get it excavated well enough, maybe you can even use a chainsaw.

Wanna rent an Air/Water Knife?
Could be done manually too.

 

[Merle Nelson]

I bought some of those Oregon 'Power Sharp' bar and chains for purposely cutting into dirt ladden roots. Back to ok cutting sharpness in 5 seconds with saws power and can go through the resharpening process about 20 times before I discarded chain.

 

[Hotsaw]

Shove a truk tire under it, douse it in 2 parts diesel to 1 part gas , set garden sprinklers to spray house then lighter up , or bump the wall out, drop the floor elevation, and make a coffee table or stool out of it.

On a more serious note, you may have a problem there that goes beyond the scope of an arborist. Specifically what is goin to happen after the stump is gone and the roots decay,and has the wall been compromised to the point where removing the stump may cause the wall to fail if preventative measures to support it arent taken prior to stump removal? I know i wouldnt want that one against my insurance if it didnt work out as planned lol

 

[thedutchone]

I would definitely get a grinder in there. concrete shouldn't harm the teeth too much. Grind as much as you can then try a cutoff saw if necessary. Grinding most of the stump will make it easier to deal with.

 

[matdand]

I think a screw type spliiter may work but you really need to watch the side pressure that may develop. It could damage the wall further

What if you go at it from the top?

 

[AmericanArborist]

Thanks for the advice everyone. Everyone gave some very good constructive advice. This is why I like tree buzz.
The landscaper was able to hand dig the dirt and cut roots with an axe. I'm certain that this circumstance won't be the only encounter in the future though and when it does present itself again I will have a few options to try.