Can Fiberon Decking be installed over existing joists and framing?

Yes, Fiberon Decking can be installed over an existing substructure if the following conditions are met:

  1. The existing framework must be free of any damage or decay; i.e., in good, workable condition (consider having the space assessed by a licensed deck inspector)
  2. The joists must be spaced correctly
  3. There must be adequate cross ventilation and unobstructed airflow under 50% of the deck. Allow a minimum of 1.5 inches (4 cm) between bottom of joist and the ground. Water must be able to flow away from under the deck. Improve drainage or grade flat areas where standing water may gather, and do not install decking directly to an existing or solid surface.

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