Instructions / Assembly

Joist Spacing and Blocking
Quick Reference Guide
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Blocking: should be
installed edge to edge to
allow for fastening of the
interior blocking.
Blocking required every 4’ - 6'.
Blocking must be equally spaced in rows, maximum of 4 to 6 feet apart.
WHY IS BLOCKING NEEDED?
Solid wood blocking will help reduce up or down movement and/or twisting of
joists. Limiting joist movement can help reduce excessive gapping and also ensure
a more uniform finished surface of your TimberTech Deck.
Required Blocking
STEP THREE