We have a two story house on an angled slope in Wellington with large amount of wodden decking on the both levels cconnected with wodden steps in between. This was added sometime in the late 90's and I think it's pine but I can't be certain.. (it's the standard bevelled style decking you see everywhere). Also, the upper level gets more or less all day sun.
Our access is horrible so if we ever have to repalce this much decking it will be a nightmere. In this context collgues have told me that I should really be staining it in order to prolong its life but this isn't something we have done since buying the house in late 2014.
Now that the rest of our rennovations are finished, i'm contemplating taking on the staining task before this summer is over. However, having done some research it seems that no one is happy with the stain they have used. Either it's still tacky a year on, or it's faded and patchy looking a year on, or both. This seems true of various products, not just one type. My parants are so upset with their stain that they are going to flip the planks and start over.
So i'm a bit spooked by all these bad experiences, generally worn out by 3 years of rennovating and wondering if this is something we need to do?? Can anyone provide some perspective about whether staining a deck of this age would materially add to its life?