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Create a Moisture Gap at the Bottom

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1:31
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How to hang drywall

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What happens here

Leave at least a 1/2-inch gap between the bottom edge of the drywall and the floor. This critical gap prevents any potential moisture from the floor (e.g., from spills or humidity) from wicking up into the drywall panel, which can lead to moisture damage, mold growth, and structural degradation of the drywall.

Goal: Prevent moisture damage to drywall by leaving a gap at the floor.

Tools and materials

  • Drywall — Demonstrating the gap
  • Pencil — Marking the gap

What they say

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and you don't railroad your seams like this. Don't have one seam going all the way down and this seam going all the way across and so on. Having the seam that ends right here instead of goes all the way down helps prevent cracking in the mud. Leave at least a half inch gap on the bottom of your drywall so moisture doesn't go up into your drywall. When you go to screw up your drywall, always start in the center and work your way out. Fasten your drywall 3/8 of an inch on your tapered end and put a screw every 12 inches in the field. Working on the butt end of your drywall,

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