Prepare the Corner

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Taping inside corners

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What happens here

Before applying new joint compound, use a drywall knife to scrape and knock off any large clumps or excess material left over from previous pre-fill applications. This ensures a smooth and clean surface for the new mud and tape.

Goal: Create a smooth surface in the inside corner for mud application.

Tools and materials

Drywall Knife — Scraping off excess pre-fill and smoothing the surface

What they say

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Do you struggle taping and mudding inside corners? Well, I got you. Let's get after it. Go ahead, take your knife and knock off any large clumps that you have from your pre-fill. Load your all-purpose mud in a tray, take a scoop of it like this. You can either side swipe it and just run it all the way up like that. Or if that's a little bit harder, just go ahead and just do little sections at a time like this.

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