Do your post tops look like they have some "disease"? Are they rotting because of water or snow damage over years? You can prevent that from happening in the future. All you have to do is purchase metal or Miterless wood post caps. If you cover your posts with a "slip over" post cap so the post cap actually slips over the post, you can prevent that water damage. 

The best caps to buy are copper, stainless or tropical, Miterless wood post caps. You spend all this money on a fence or a deck and you want to preserve your posts so they look as good as the deck. now you know how….. jointless post caps are the answer.