How to Cut Sonotube
Concrete form tube cutting has gotten complicated with all the diameter variations, cut techniques, and accuracy requirements flying around. As someone who has used sonotubes for every foundation type, I learned everything there is to know about getting clean cuts. Today, I will share it all with you.
What Sonotubes Are
Probably should have led with this section, honestly—sonotubes are cardboard forming tubes for round concrete columns and footings.
Cutting Methods
That’s what makes technique selection endearing to us concrete workers:
- Hand Saw: Works for all sizes, slower but controlled
- Circular Saw: Faster for larger tubes
- Reciprocating Saw: Good for field cuts
Steps for Clean Cuts
- Mark cut line around entire circumference
- Use tape as guide for straight line
- Support tube to prevent rolling
- Cut slowly for clean edge
- Remove any ragged edges
Tips
- Keep blade perpendicular for square cuts
- Rotate tube while cutting for even depth
- Use fine-tooth blade for cleaner edge
- Wear dust mask—cardboard dust is irritating
