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I have a small entry area deck outside my front door, roughly 70 sqft. The deck is currently made of 2x4's and a few 2x6's screwed into ~16" on center floor joists.

I replaced the front door and siding. I now want to replace the deck surface. I am thinking of replacing the current 2x4 and 2x6 boards with 1x4 hardwood deck boards.

I can unscrew the current 2x4 floor boards, but then how do I makeup for the 3/4" difference (2x vs 1x) in floor board thickness?

I want the new deck to work with the current door threshold height. Will I need to replace the current floor joists?

  • Why not just attach some 1x boards to the joists to shim them 3/4" higher? – mbeckish Aug 5 '15 at 21:11
  • Oh, whoops I see. Is there some standard way that people do this? Maybe this is it. Are you suggesting that I take 1x something boards, rip these into 1x2 (3/4” x 1 ½”) boards, screw the 1 ½” face of these boards to the joists, and then nail the decking into these? I could do this. Does this stand the test of time? What kind of wood might I use for this? The current joists are made of pressure treated lumber. – DavidC Aug 5 '15 at 23:17

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