Zver11, I had a carpenter bee problem in my shed and I panted the critical areas with driveway sealer, looks like crap, but no bee problem for about 5 or 6 years now. I tried the same thing out where the sun could hit it and it scaled of in just 2 or 3 years. I have heard that plain house paint would work, but I was looking for something cheap and did not care how it looked.

Commanche, What's up chief? I saw your comment about using untreated pine - now thats something I never heard of before. I suspect it would not pass building codes, but you do have me thinking about it. Its just hard to beleive that stained untreated pine would hold up to any adverse weather/sun conditions. What stain did you use? Anybody else ever try this? On the other had, it does seem that the (questionable) protection from today pressure treating has the adverse effect of making the wood very high in moisture content when its bought and then it moves all over the place as it dries. If I did buy PT, I would prefer to sticker it and let it air dry for a year or so but I don't have that kind of time (or should have thought about that last year). Any one know where you can get PT wood that has been thoroughly dried down to a guranteed moister content? Factor applied water seal and moldicide would be even better. There is still a downside in that PT would often has that greenish color from the PT process and it does not look natural, or even looks like mold. Anyway, thanks again to all who have made suggestions. I am still researching my options and I am learning a lot form this forum. PS - anybody use the CAMO Marksman hidden screw system. It has a screw alignment jig that angles the screw in the edge of the board at a 45 degree angle. I will see if I can find a thread on this. Link below. http://www.protoolreviews.com/reviews/hardware/screws-nails/camo-marksman-pro-fastener Here is a link that might be useful: CAMO hidden screw system

Well, maybe the angle of the shot wasn't the greatest, but it certainly is the underside of the deck. It is painted and has mold.

I am having my current deck resurfaced with trex decking and looking to add a under decking drainage system to prevent water from dripping under the deck in to my patio. There are several drainage systems with loads of pros and cons. My main question is since I’m putting new decking on there are a few systems that are installed before the decking material vs the under decking systems with gutters that are put on after. Which is the better systems to prevent water from leaking Underneat?