Does anyone have experience with pushing the limits of joist span for composite decking? My joists are generally 16" OC but a few gaps are up to 17.5" max (one has a short section at 18"). I'm worried that the composite or even 5/4" pressure treated pine will produce a bounce. Everywhere I see 1" composite they all say max 16" for residential, 12" commercial (this is a residential project).
Is an extra inch or two going to make a big difference? Is there any easy(ish) way of fixing this short of moving my joists or installing intermediates? The easiest solution I can think of is pulling off all the joists and inserting a new one. This isn't especially fun though because they aren't spanning a parallel frame (they will have to be cut slightly to shift down).