Section 6.4.6

Timber Floor Decking

Holes created within the web of joists are a necessity to allow the passing of services and notching and drilling shall be carried out within the recognised limits. The flange of I-joist not be notched or drilled under any circumstance.

  • D4 glue applied to the top of the joists and perimeter noggins.

  • First board to be laid on to one continuous 6mm bead of adhesive.

  • Panels should be fixed at the perimeter, using annular ringshank nails or screws at 200mm-300mm centres.

  • Follow design for setting out process.

  • Lay perimeter boards to a line to ensure a correct expansion gap is maintained.

  • D4 adhesive applied generously into the groove of the chip board.

  • Liberal amount of adhesive applied to the top of the tongue.

  • Boards laid to a brick bond pattern.

  • Ensure an appropriately sized timber is used to shunt the boards into position to prevent damage to the board.

  • Excess adhesive should be left to dry.

  • D4 adhesive is not to be used as a gap filler.

  • Protect the edge of the board and any exposed nails with D4 adhesive.

  • The excess glue can be scraped off after the building becomes water tight.

  • Ensure expansion gap to rigid upstands are a minimum of 10mm.

  • Add an additional 2mm per meter for lengths over 5m.

  • Unsupported perimeter edges and short end joints should be supported by a noggin.