I keep getting conflicting advice on installing closeboard fencing.
Some say to only put one nail in across the width of the featheredge plank, thereby trapping the thin edge or the underlying plank to allow for expansion and contraction. While others say nail through the wide edge of the feather edge plank and then through the thin edge of the underlying plank to trap both. (as per the guidance on the project page of this site).
From a brief look around my local area about 60% of the fences have been nailed through both planks, with the rest using the trapping method (nailing only one plank). Also couple of builder friends recommended nailing both planks same as the project recommendation on this site.
I am using a 30-40% overlap on 6" plank (want a strong fence) and nailing through both planks at the moment, but I am worried about reports of splitting from some of those using this method and I just can't find any reliable guidance about which method is best. I am also using two nails per aris rail (6 nails per plank) for a very strong fix and using 50m oval nails to minimise splitting.
Any guidance appreciated.