If the fence that you purchased has a fifteen (15) year written warranty, you have had the fence for eight (8) years and you have discovered that it is defective where the manufacturer agrees that defective materials were used but wants to charge you to remove the defective fence and replace it with a new fence, if you filed an action be it in the small claims court or in a court with greater jurisdiction for awards beyond small claims, you would not be barred by any statute of limitations.The reason is that by virtue of the fifteen (15) year manufacturer's warranty, you have fifteen (15) years to bring a lawsuit after installation for breach of warranty.Good luck.