After the rot was dealt with on this deck, the next step is to get the framing ready for new plywood. Where this deck had been rotting, the framing had began to sag and droop over the years. With part of the ledger removed, now is the time to straighten the deck up and help water flow off the deck. With the deck sagging, water will start to the puddle in the middle of the deck which doesn’t look great and can cause further problems.
We ran a string line between 2 joists and framed the new joists to this height. Rather than the deck sagging into the middle near the door, the back edge of the deck now runs flat and helps improve slope towards the front of the deck. The joists used in this deck are 2×6, and we hung them by using joist hangers and hanger nails into the ledger.
Joists can sit at different distances apart from deck to deck, but most commonly they are 16″ on centre. This means that every 16″ is the start of a new joist. The distance between joists can make or break a deck frame. Too far apart and deck will be weak and feel bouncy to walk on. Now having joists too close might seem like the smarter idea, but this can be overkill and is unnecessary for most common applications. When we are installing vinyl flooring, we typically use 3/4″ plywood on top of 16 OC joists. This offers a great feeling deck and is plenty strong to last many many years.
Here in Vancouver the most common wood used for framing is Spruce or Fir. This softwood comes in many different sizes and lengths which is great for framing. This wood can be pressure treated with a chemical to help weather proof it if exposed to the elements.