Is this a typo in the moisture section?

  • Decay Hazard Index ≤ 20: maximum lumber MC at finish installation = 10%;
  • Decay Hazard Index 20 to 70: maximum lumber MC at finish install = 12%; and
  • Decay Hazard Index ≥ 70: maximum lumber MC at finish install = 15%.

How come youre allowed to have more moisture in the wood if the decay hazard is higher??

Are you asking how come the decay hazard is higher if the moisture content in the wood is higher?

no, the percentages are saying what the allowable maximum moisture is in the wood at the finishing part of the install.

Where does it say allowed? who allows it? It is saying the decay hazard is higher if there is more moisture in the wood. Duh!

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