Here’s some before pics and some after pics of a deck in Westville that had rotted and was removed and replaced.
The original deck had been built using H2 CCA Treated pine as a structure and what looked like balau deck boards and H2 CCA treated timber was used in the balustrade. See here for an article on the correct Hazard Classification for using treated pine in outdoor projects. https://blog.thewoodjoint.co.za/2015/06/21/balau-vs-cca-treated-substructure-in-your-wooden-deck-durban-and-cape-town/.
It is vitally important to use at least H3 CCA treated pine in any outdoor application where occasional wetting occurs. H2 CCA pine is designed for roofs and will rot outdoors. H3 is designed for outdoors and will last at least 50 years outdoors in the rain provided it has a chance to dry out after it rains.
The balau deck boards on this deck run in the opposite direction to the way we normally build them. In other words they run the width rather than the length. The reason for this was that we needed to follow the curve of the existing paving and running the deck boards the length would have resulted in long thin slivers of deck boards to get the curve. Running them the width meant we could cut the end of the deck board to follow the curve. A much neater job at the end of the day and less chance of splintering.
Because of the way the deck boards run it results in short main beams and longer joists as can be seen from the front view of the deck. The mean beams always run in the same direction as the deck boards with joists on top of beams running perpendicular to deck boards. The ends of these main beams of 228mm can look unsightly and can be clad to cover the pine. In this instance though the client opted not to clad them as there is unfortunately an additional cost and the front of this deck is not really seen unless one is standing in the garden on the lower level. We did clad the sides though as these are very visible. This we did at no extra cost. You know, “going the extra mile” and all.
The balustrade is full balau this time around and should outlast at least me. Maybe not my kids, as all wood will rot in time. The balau just takes a lot longer to rot which makes it the ideal outdoor timber to be used in timber decks and balustrades.
The deck was oiled as opposed to being coated which retains the natural look and feel of the wood and is easy to maintain going forward as you simply clean it and put more oil on it.
For a free no obligation quote on your timber decking, balustrade, pergola, screens and other outdoor work, please contact us on 082 496 5444 or use the contact us form below. We also supply install in door wooden floors.