Here’s a wooden pool deck we built in La Lucia, Durban recently. In the gallery above you can see pics of the old deck and then pics of the new deck. The old wooden pool deck had started to rot at critical points. The reason for rot in many wooden decks is that the screw holes are not plugged, water gets in and travels up the end grain of the wood resulting in rot at the screw holes. Water travels more easily along the end grain of wood than the side or face grain. So it is important to seal the end grain as far as possible to prevent this. In the case of the end of deck boards the water never really gets trapped so it can drain away quickly enough to prevent rot. However in the case of a screw holes water collects in the screw hole and then has enough time to be absorbed by the end grain before it evaporates. As a standard procedure we fill counter sunk screw holes with epoxy to prevent this from happening.
The epoxy we use is clear so that saw dust can be mixed with it to match the colour as closely as possible. It is also slightly pliable. In hot and cold weather, wood expands and contracts, as does most materials. If you consider a screw hole. The sides of the screw hole will expand thereby closing the screw hole or making it smaller. Whatever is in the screw hole, as a plug, will also expand. So if the screw hole is getting smaller and the plug is getting bigger it makes sense that whatever is in there will likely try to “pop” out. Using a slightly pliable epoxy can reduce the chance of this plug popping out. Hence the reason for not using solid wood plugs cut with a plug cutter. The epoxy should be pliable enough to take up the expansion of the screw hole but hard enough not to degrade due to weather conditions.
We used 90mm balau deck boards on this deck. They are slightly more expensive but some clients prefer them to the standard 68mm boards. Being a wider board one needs to secure them on both shoulders on each joist rather than just a single screw in the middle of the boards, as is the case with a 68mm board.
The job took a bit longer than I would have liked because the substrate that we were building on top of, paving and concrete in this case, were quite uneven so we had to shim and trim joists to get the top of our joists level, flat and at the desired height to be flush with the inside of the house. The jacuzzi cladding was also quite tricky because we had to build a removable structure so that one can access the front of and below the jacuzzi. One side of the jacuzzi step is also wider than the other one so the corner required some fancy carpentry work in order to get the boards to line up and match. I’m glad I took so many pics of the deck before we removed it so that we could copy it exactly.
There were also some wedges that we had to cut along the front edge as the tiles and existing patio were not square to the wall we were building our wooden deck up against. Whenever the existing buildings are not square there is always some sacrifice one needs to make and the trick is to get it least visible to the eye. In this case the client wanted the wedges rather than cutting the tiles or bringing the front of the deck past the line of existing buildings.
For a free no obligation quote on your wooden pool deck, or other balau timber construction, please call us on 082 496 5444, or use the contact form below and one of our representatives will get in touch with you.