How Many Holes Can You Cut in One Joist for Plumbing?

If you’re renovating your bathroom, installing a new sink, or rerouting pipes through your floor, you’ve probably asked yourself: “How many holes can I safely cut in one joist for plumbing?” You’re not alone. Many DIYers and even some contractors struggle with balancing plumbing needs and structural safety. Cutting too many holes—or cutting them in…