Installation Guide For Composite Decking

​​In addition to the manufacturers fixing instructions, the following notes highlight specific guidance from BoDa composite:

Wood Composite deck boards are subject to expansion and contraction when exposed to variations in temperature. To accommodate for this potential thermal movement:

• Allow a 30mm expansion gap around the perimeter of the deck giving consideration to all walls, posts and other obstacles.
• Allow a 10mm expansion gap between the ends of boards
• To prevent ‘creep’ secret fix each board with a single screw, positioned half way along its length, angled at 45 degrees and fixed through the bottom lip of the groove and into the joist or bearer below.

In addition:

• To aid water run off prepare the sub-frame to accommodate a fall of 2mm per metre along the length of the deck boards.

• Fix joists at a maximum of 35cm centres when boards are fitted perpendicular to the joist direction. When boards are fitted diagonal to the direction of the joist/bearer provide supports at 30cm centres.
• If the deck is to be raised or used for commercial use, seek guidance from a qualified engineer to ensure the structure is sufficient to carry the potential loading.