This was a wooden deck built in balau for a client who had opened a Bed and Breakfast on the coast. As you can see form the pics the wooden deck was built in the front of the property overlooking the sea. There were of course strict time lines in which we had to complete this wooden deck as they had already made confirmed bookings. With these job which are a fair distance from home we normally rent accommodation and pay the builders a live out allowance for food etc. It inevitably pushes the cost of the build up slightly which is unavoidable.
There are some before and after pics in this article. We had to excavate the soil below. It is always best to leave a fair amount of space below the bottom of the structure and the bottom of the deck boards to allow sufficient airflow for water evaporation. If the deck structure is touching the ground then one would need to use H4 CCA Treated timber which has a minimum life span of 20 years in constant contact with wet soil as per SAWPA (South African Wood Preservers Association). H3 CCA Treated pine as a structure which is NOT in constant contact with wet soil has a minimum life span of 50 years if correctly installed. So it makes sense to keep the structure to H3 for cost purposes, and expected minimum life span, but keep it well clear of any soil. By allowing air to flow freely between the structure and the ground keeps everything relatively dry below and the deck structure will last a lot longer. Continual dampness below speeds up rot and premature failure. In this instance we excavated to at least 300mm below the structure.
There was a pool that had been installed prior to our build by Clear Blue Pools – Gary Botha (071 679 1013) and we worked closely with the pool builder so that the concrete ring beam of the pool was set down 60mm from the desired deck height (top of deck). This allows us a 40mm batten on top of the concrete ring beam and a 19mm deck board. 40mm is the minimum we like to allow for this purpose, again to allow for sufficient air flow to keep things dry between the deck surface and the ring beam. These cleats or battens are fixed directly to the concrete ring beam and the rest of the joists which are suspended above soil become a 38 x 114 to give it lateral strength.
The rest of the deck was pretty much the same then as the other decks we’ve built using 19 x 68mm yellow balau deck boards, counter sunk screw holes filled with clear epoxy and saw dust mixture, sanded flat and oiled using a decking oil.
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