I purchased a new house and discovered the existing deck was rotted due to whomever built the deck, used Doug fir for the under layment. It would be just a matter of time before it collapsed. I live just south of Portland, Oregon and there is lots of rain in the winter. I had no choice but to jump on this right away. 6 wks later it is almost done. And it was built during the winter when we had record rains. Notice the 2 packing crates my wife brought from work for her herb garden.