Another big question in the cedar world is. What type of fasteners do I use with cedar.
A.) Regular zinc coated screws.
B.) Hot dip galvanized steel.
C.) Epoxy or porcelain coated.
D.) Stainless steel screws.
If you chose (A) you would have terrible blackening in the cedar around the screw head and eventual failure of the screw itself.
If you chose (B) you would also have blackening of the cedar around the fastener but the galvanized coating would keep it from rotting through.
If you chose (C) you would only have blackening where the coating failed and the screw would stay true as long as the barrier stayed true.
If you chose (D) you have made the right choice. No blackening of the wood and no rotting of the metal of any kind. It is pretty self explanatory that stainless steel is the only choice.
Choosing an under mount fastening system is another way of adding longevity to your deck project. This will eliminate any surface water penetration point.