Hello Dave,

Like I said, I've had some shingles standing outside just leaning up against the fence for about 5 years which are in good shape still, Other planks that are outside lying on the ground - off-cuts and so - start to show signs of serious degradation after two or three years. The sawer at the sawmill, a real wind powered sawmill, told me that poplar fencing he had seen lasted 20 years and only rotted from one side. All that said, I guess it is a subjective matter in the end.

Greetings,

Don Wagstaff