There is a saying in the window industry – “A window is only as good as the installer”
I believe that applies to deck building also. Here are a few of our detailed installation techniques.
We recommend every deck be built with a Single picture frame border, The border acts as a drip edge for the decking, and covers the framing / fascia gap. This is a nice design feature, but it’s main function; is to prevent “rot”, “oil canning” and debris build up in the framing / fascia gap. Another one of our features is a triple stack fascia that covers all the horizontal framing, adds more depth to the deck rim, and gives a decorative stack trim or crown molding look.
Notice in the first picture below (grey deck) where there is no picture frame border, and you have oil canning of the fascia board. In the next two pictures you can see a cedar deck that didn’t have a picture frame border, and you can see how the fascia board cap of the rim joist creates an area where water and debris can build up.
Now below you can see how the picture frame border covers the fascia/frame gap. This also allows water to run through on the inside of the picture frame border, unlike the decks above there is not a joist directly underneath where the water and debris will fall through. The last function of the picture frame border is that it covers the cut ends of the decking which is kind of like a bull-nose in tile work.
In the first picture below you can see we just finished installing the decking and picture frame border, notice how the border is hung way over the rim joist. In the next two pictures you can see how the picture frame border covers over the triple stack fascia protecting the fascia/framing gap. This is an important detail in proper deck construction techniques!