Norway Maple Zip‑Line Nails: Sap Flow = Wound, Not Disease

Nails Tapped Sap Stream

Zip‑line nails broke bark seal → spring root pressure pushed sap out. Same principle as maple syrup tapping.

Outcome

• Flow stops as wound calluses (weeks).
• Nails will eventually loosen as decay fungi enter.
• Tree won’t die, but hollow may start at nail sites.

Never nail into trees. Use straps with protective padding for attachments.