![]() I am sure there are many more options now for decking than in 2011 and perhaps some of the shortcomings of composite has been addressed. The deck was build with joists 12" on center and is solid. We went with Trex Transcends as we determined we wanted full poly, but could not afford it. The composite boards really faded, the best I could describe it is that the cut end on a new board is about the color it will fade to. One side was built with boards that had sat out for a year, the other side was done with fresh boards. ![]() The local lumberyard had a deck built in their show room with all the composite decking they offered in most the colors. This was critical for us as the deck is under a walnut tree. They also got blueberry, raspberry, and coffee grounds smushed on them and sat for a day. She would drop a cement block on it while one end was supported on a brick to see how they handled impacts. We looked at over a dozen different decking options. Time will tell, but it would appear to working much better than leaving exposed holes in the top of the joist to fill with water. When putting the new decking down the hardware screws are sealed by the butyl rubber. Anyway, with the tape installed and the "wings sticking out very little of the joists actually get wet and any joints stay pretty dry. It spanned over the top where the joist would meet ledger board. So actually it was really only in contact on the very top of the joist. When it was installed it would stick on the side of the joints but eventually popped up like little wings. The joist tape that I purchased was like butyl rubber on a very thin plastic sheet-sticky on both sides though. ![]() The holes from previous decking were holding water for days after the rains. The joists were exposed to rain while we were replacing the rim joist on the house. In our case we removed a previous deck and kept the original joists, The ledger board had some rot(very small and was able to remove/replace) where it was holding water between the OSB sheeting on the home. I understand what you are saying about trapping water.
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