As you may recall from my recent posts I’m lowering the floor in a basement. This process has presented problems and challenges.

A home’s foundation has a footing on the bottom that helps distribute the weight of the foundation. When I excavated below the foundation the footing was exposed. Naturally, my plan was to extend the foundation and to add a new footing. However, there was a problem. When the original foundation was poured overflow concrete seeped out forming excess clumps of concrete. This concrete would need to be removed if I hoped to correctly pour the new foundation extension.

I tried several methods to cut off the excess concrete, but none worked successfully. I had no choice but to rent an hydraulic Ring Saw. This tool has a large 18 HP gas powered external unit which is connected to a relatively light saw by hydraulic hoses. In addition, a third hose is connected to a water source as this is a wet saw. The water is used to reduce friction, and to keep the blade cool. I needed to use this complicated system as its engine component could be placed outside of the basement. Using a gas powered saw directly in a closed space is never a good idea.

The saw’s engine component is very heavy, but luckily I have my own Bobcat. The tool rental store loaded the saw on my truck, and I rolled it from the truck to the scoop on the Bobcat.

Using the saw was awkward, but I had an assistant to help me manage the hoses. However, the water from the sawing process added to the overall mud in the basement.

I was able to make a deep cut separating the excess concrete from the footing. I then used a handheld electric jackhammer in this cut to remove the excess concrete.

The process was messy, but I was able to remove the excess concrete allowing me to properly build concrete forms to extend the foundation to its new lower depth. I’ll show you that process in a future post.

Moving the Ring Saw’s hydraulic unit from the truck to my Bobcat.
Successfully loaded, I moved this very heavy unit to the back of the house. Long hoses connect it to the actual Ring Saw.
Here you can see the excess concrete that needed to be cut off.
Another view of the foundation/footing showing the rough excess concrete that needed to be removed.
The saw. The two black hoses are the hydraulic hoses, and the yellow hose is for the water connection.
Cutting into the excess concrete using the Ring Saw.
The Ring Saw added more water to an already muddy mess.
I used a hand-held electric jackhammer to further pry the excess concrete from the foundation. You can see the clean edge that this method yielded.