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Stesso

Sand the Joint Compound Smooth

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0:37
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Day 1 of renovating my garage

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What happens here

Once the joint compound is thoroughly dry, sand the filled areas and seams smooth. Use sandpaper (e.g., 80-120 grit) on a sanding block or an orbital sander. Ensure the surface is uniform and free of ridges, bumps, or rough spots. Wipe away all sanding dust completely using a damp cloth or shop vacuum before proceeding to the next coat of joint compound or the priming stage. This sanding step is iterative and should be performed after each coat of joint compound application to build up a perfectly smooth surface.

Goal: Achieve a perfectly smooth and seamless surface by sanding the dried joint compound.

Tools and materials

  • Dust Mask / Respirator — Protecting lungs from fine dust particles
  • Orbital Sander — Faster sanding over large areas
  • Safety Glasses — Protecting eyes from sanding dust
  • Sanding Block — Holding sandpaper for manual sanding
  • Damp Cloth — Wiping away fine dust after sanding
  • Sandpaper — Smoothing the dried joint compound

What they say

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unevenly. Just painting it won't fix this. If you don't prep this wall, it's actually going to make this worse. You need to clean it really well, pound in all your nails and your staples or pull them out, then go ahead and seal your seams, sand it down, and then prime and top coat. I'm going to be taking this wall from this to over the next week. If you don't want your OSB turning out like trash, follow along.

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