[jrainwat]

How soon can I paint treated lumber? And could I used screws or nails on treated lumber?

[tickle]

I don't know how you would put 'treated' lumber together for anything you are building without using screws and nails. You don't have to wait to paint treated lumber.

[ThomasCKeat]

Paint when dry, Pilot holes if predrilled will prevent your lumber from splitting when nailed or screwed just drill a hole a little smaller then the shank size of your screw or nail before placing nail or screw to prevent unsightly splits and cracks

[glavine]

Don't nail it, the treated wood shinks so much after it drys you nails may not hold like they should, we use 3 screws on the handrails and joists and 2 1/2 on the decking boards, we use nails or nail gun to just get the framing started and that's it, as for paint as long as its not really green and wet , id say a month wait time would be fine, you'll hear of many more months than that but if it looks dry prime it and paint it,