Project Overview

Once your posts are in place it’s time to install the plinth and rails for your fence. Follow this step-by-step guide and we’ll show you how to attach the fixing blocks and the plinth to your posts. You’ll see how to measure and cut checks in your posts for the rails.  Plus, how to cut and attach the railing posts, including an angled corner post.
Continue to step-by-step instructions
This D.I.Y. Advice is part of a series How to build a picket fence

Step by Step Instructions

1 Attach the plinth boards
2 Measure and mark rail positions
3 Cut the slots for your rails
4 Measure and attach your rails
  • Step 1. Attach the plinth boards

    Mark the height of the plinth on the posts. Measure and mark the same depth as your plinth. Cut fixing blocks from treated pine timber and nail them to the posts. Place your first plinth in place and nail it to one of the fixing blocks. Use your spirit level to make sure the plinth is level and nail it off at both ends.  Continue along the fence line
  • Step 2. Measure and mark rail positions

    Measure and mark the position of your rails on one of your posts. For a big fence you need a top, middle and bottom rail. Place a picket on top of the plinth and mark on it where the top and bottom of each rail will be. Use the picket to transfer these positions to the other posts.  Use your square to run lines around the posts. Mark the depth of the rail on each post. Put a cross on the area of timber to be cut out. 

  • Step 3. Cut the slots for your rails

    Set the depth of the saw to the width of the rail. Make a few cuts in the marked rail positions. Use your hammer to knock out the cuts and tidy them with a chisel. Corner posts need a housing joint. Mark it the same as the others. Just cut the corner area out. Use the chisel to tidy it up. 
  • Step 4. Measure and attach your rails

    Take measurements between the first two posts. If the length of the fence is longer than the timber make a join in the center of a post. Make the cut for the corner post at a 45 degree angle. This means the two rails meeting at the corner will fit together.  Place the rails in the slots and nail them off. Continue along the fence for your middle, top and bottom rails.

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